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<title data-rh="true">Самоучитель по языку SQL с нуля: освоите основы, изучите функционал бесплатно</title>
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<style type="text/css" data-chunk="LcFeatures" data-name="LcFeatures">.swiper-container{position:relative;z-index:1;overflow:hidden;margin:0 auto;padding:0;list-style:none}.swiper-container-no-flexbox .swiper-slide{float:left}.swiper-container-vertical>.swiper-wrapper{flex-direction:column}.swiper-wrapper{position:relative;z-index:1;display:flex;box-sizing:content-box;width:100%;height:100%;transition-property:transform}.swiper-container-android .swiper-slide,.swiper-wrapper{transform:translate3d(0,0,0)}.swiper-container-multirow>.swiper-wrapper{flex-wrap:wrap}.swiper-container-free-mode>.swiper-wrapper{margin:0 auto;transition-timing-function:ease-out}.swiper-slide{position:relative;flex-shrink:0;width:100%;height:100%;transition-property:transform;-ms-flex-negative:0}.swiper-slide-invisible-blank{visibility:hidden}.swiper-container-autoheight,.swiper-container-autoheight .swiper-slide{height:auto}.swiper-container-autoheight .swiper-wrapper{align-items:flex-start;transition-property:transform,height;-webkit-box-align:start}.swiper-container-3d{perspective:1200px}.swiper-container-3d .swiper-wrapper,.swiper-container-3d .swiper-slide,.swiper-container-3d .swiper-slide-shadow-left,.swiper-container-3d .swiper-slide-shadow-right,.swiper-container-3d .swiper-slide-shadow-top,.swiper-container-3d .swiper-slide-shadow-bottom,.swiper-container-3d .swiper-cube-shadow{transform-style:preserve-3d}.swiper-container-3d .swiper-slide-shadow-left,.swiper-container-3d .swiper-slide-shadow-right,.swiper-container-3d .swiper-slide-shadow-top,.swiper-container-3d .swiper-slide-shadow-bottom{position:absolute;z-index:10;top:0;left:0;width:100%;height:100%;pointer-events:none}.swiper-container-3d .swiper-slide-shadow-left{background-image:linear-gradient(to left, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0))}.swiper-container-3d .swiper-slide-shadow-right{background-image:linear-gradient(to right, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0))}.swiper-container-3d .swiper-slide-shadow-top{background-image:linear-gradient(to top, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0))}.swiper-container-3d .swiper-slide-shadow-bottom{background-image:linear-gradient(to bottom, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0))}.swiper-container-wp8-horizontal,.swiper-container-wp8-horizontal>.swiper-wrapper{touch-action:pan-y}.swiper-container-wp8-vertical,.swiper-container-wp8-vertical>.swiper-wrapper{touch-action:pan-x}.swiper-button-prev,.swiper-button-next{position:absolute;z-index:10;top:50%;margin-top:-22px;cursor:pointer}.swiper-button-prev:focus-visible,.swiper-button-next:focus-visible{outline:2px solid #7f5dd8;border-radius:2px}.lc-page__screens-carousel>.lc-carousel__controls .swiper-button-prev,.lc-page__screens-carousel>.lc-carousel__controls .swiper-button-next,.lc-page__screens-carousel>.lc-carousel__controls .swiper-pagination{position:fixed}.swiper-button-prev.swiper-button-disabled,.swiper-button-next.swiper-button-disabled{cursor:auto;pointer-events:none;opacity:.35}.swiper-button-prev,.swiper-container-rtl .swiper-button-next{right:auto;left:10px;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20viewBox%3D%270%200%2027%2044%27%3E%3Cpath%20d%3D%27M0%2C22L22%2C0l2.1%2C2.1L4.2%2C22l19.9%2C19.9L22%2C44L0%2C22L0%2C22L0%2C22z%27%20fill%3D%27%23007aff%27%2F%3E%3C%2Fsvg%3E")}.swiper-button-next,.swiper-container-rtl .swiper-button-prev{right:10px;left:auto;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20viewBox%3D%270%200%2027%2044%27%3E%3Cpath%20d%3D%27M27%2C22L27%2C22L5%2C44l-2.1-2.1L22.8%2C22L2.9%2C2.1L5%2C0L27%2C22L27%2C22z%27%20fill%3D%27%23007aff%27%2F%3E%3C%2Fsvg%3E")}.swiper-button-prev.swiper-button-white,.swiper-container-rtl .swiper-button-next.swiper-button-white{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20viewBox%3D%270%200%2027%2044%27%3E%3Cpath%20d%3D%27M0%2C22L22%2C0l2.1%2C2.1L4.2%2C22l19.9%2C19.9L22%2C44L0%2C22L0%2C22L0%2C22z%27%20fill%3D%27%23ffffff%27%2F%3E%3C%2Fsvg%3E")}.swiper-button-next.swiper-button-white,.swiper-container-rtl .swiper-button-prev.swiper-button-white{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20viewBox%3D%270%200%2027%2044%27%3E%3Cpath%20d%3D%27M27%2C22L27%2C22L5%2C44l-2.1-2.1L22.8%2C22L2.9%2C2.1L5%2C0L27%2C22L27%2C22z%27%20fill%3D%27%23ffffff%27%2F%3E%3C%2Fsvg%3E")}.swiper-button-prev.swiper-button-black,.swiper-container-rtl 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1s steps(12, end) infinite}.swiper-lazy-preloader:after{display:block;width:100%;height:100%;content:'';background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg%20viewBox%3D%270%200%20120%20120%27%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20xmlns%3Axlink%3D%27http%3A%2F%2Fwww.w3.org%2F1999%2Fxlink%27%3E%3Cdefs%3E%3Cline%20id%3D%27l%27%20x1%3D%2760%27%20x2%3D%2760%27%20y1%3D%277%27%20y2%3D%2727%27%20stroke%3D%27%236c6c6c%27%20stroke-width%3D%2711%27%20stroke-linecap%3D%27round%27%2F%3E%3C%2Fdefs%3E%3Cg%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%20transform%3D%27rotate%2830%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%20transform%3D%27rotate%2860%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%20transform%3D%27rotate%2890%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%20transform%3D%27rotate%28120%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%20transform%3D%27rotate%28150%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.37%27%20transform%3D%27rotate%28180%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.46%27%20transform%3D%27rotate%28210%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.56%27%20transform%3D%27rotate%28240%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.66%27%20transform%3D%27rotate%28270%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.75%27%20transform%3D%27rotate%28300%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.85%27%20transform%3D%27rotate%28330%2060%2C60%29%27%2F%3E%3C%2Fg%3E%3C%2Fsvg%3E");background-repeat:no-repeat;background-position:50%;background-size:100%}.swiper-lazy-preloader-white:after{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg%20viewBox%3D%270%200%20120%20120%27%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20xmlns%3Axlink%3D%27http%3A%2F%2Fwww.w3.org%2F1999%2Fxlink%27%3E%3Cdefs%3E%3Cline%20id%3D%27l%27%20x1%3D%2760%27%20x2%3D%2760%27%20y1%3D%277%27%20y2%3D%2727%27%20stroke%3D%27%23fff%27%20stroke-width%3D%2711%27%20stroke-linecap%3D%27round%27%2F%3E%3C%2Fdefs%3E%3Cg%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%20transform%3D%27rotate%2830%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%20transform%3D%27rotate%2860%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%20transform%3D%27rotate%2890%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%20transform%3D%27rotate%28120%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.27%27%20transform%3D%27rotate%28150%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.37%27%20transform%3D%27rotate%28180%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.46%27%20transform%3D%27rotate%28210%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.56%27%20transform%3D%27rotate%28240%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.66%27%20transform%3D%27rotate%28270%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.75%27%20transform%3D%27rotate%28300%2060%2C60%29%27%2F%3E%3Cuse%20xlink%3Ahref%3D%27%23l%27%20opacity%3D%27.85%27%20transform%3D%27rotate%28330%2060%2C60%29%27%2F%3E%3C%2Fg%3E%3C%2Fsvg%3E")}@keyframes 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.swiper-slide-active{pointer-events:auto}.swiper-container-cube .swiper-slide-active,.swiper-container-cube .swiper-slide-next,.swiper-container-cube .swiper-slide-prev,.swiper-container-cube .swiper-slide-next+.swiper-slide{visibility:visible;pointer-events:auto}.swiper-container-cube .swiper-slide-shadow-top,.swiper-container-cube .swiper-slide-shadow-bottom,.swiper-container-cube .swiper-slide-shadow-left,.swiper-container-cube .swiper-slide-shadow-right{z-index:0;backface-visibility:hidden}.swiper-container-cube .swiper-cube-shadow{position:absolute;z-index:0;bottom:0;left:0;width:100%;height:100%;opacity:.6;background:#000;filter:blur(50px)}.swiper-container-flip{overflow:visible}.swiper-container-flip .swiper-slide{z-index:1;pointer-events:none;backface-visibility:hidden}.swiper-container-flip .swiper-slide .swiper-slide{pointer-events:none}.swiper-container-flip .swiper-slide-active,.swiper-container-flip .swiper-slide-active 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Поймёте, как работает язык запросов SQL, научитесь выгружать, преобразовывать, фильтровать и сортировать данные. Решите 70 задач.</div></div></div></div></section></div></div><div class="lc-grid2-item" data-grid-item-id="false" style="grid-row-end:6;grid-row-start:4;grid-column-end:4;grid-column-start:3;width:min-content;height:45px;justify-self:start;align-self:end;margin-left:24px;margin-bottom:24px"><div class="lc-background-empty lc-background-empty_inLcGrid2" data-image-src=""><section id="button" class="lc-section lc-section_is-expanded lc-section_no-paddings lc-section_no-margins lpc-section "><div class="lc-offsets" style="padding:0px 0px 0px 0px"><div class="lc-button-component lc-button-component_in-grid2"><span style="--font-family-base:YS Text, Helvetica, Arial, sans-serif;--font-weight-base:400;--color-base:#ffffff;--background-color-base:#1e1e1e;--border-radius-base:6px 6px 6px 6px;--border-base:none;--shadow-base:none;--font-family-hover:YS Text, Helvetica, Arial, sans-serif;--font-weight-hover:400;--color-hover:#ffffff;--background-color-hover:#1e1e1e;--border-radius-hover:6px 6px 6px 6px;--border-hover:none;--shadow-hover:none;--font-family-active:YS Text, Helvetica, Arial, sans-serif;--font-weight-active:400;--color-active:#ffffff;--background-color-active:#1e1e1e;--border-radius-active:6px 6px 6px 6px;--border-active:none;--shadow-active:none;--sizes-width:120px;--sizes-height:50px;--sizes-padding-left:20px;--sizes-padding-right:20px;--sizes-font-size:16px;--sizes-letter-spacing:0px;--sizes-icon-height:20px;--sizes-icon-offset:5px"><a class="Link link lc-link lc-button2 lc-button2_size_min lc-button2_animation_scale lc-button2_type_link undefined " href="https://start.practicum.yandex/sql-database-basics/?from=blog-practicum" target="_blank" data-clickable="true" rel="['noopener']"><div class="lc-button2__under"></div><span class="lc-button2__text"><div class="lc-styled-text"><span class="lc-styled-text__text lc-styled-text__text_align_center">Начать учиться бесплатно</span></div></span></a></span></div></div></section></div></div></div></div></section></div><div class="lc-background-empty" data-image-src=""><section id="chto-takoe" class="lc-section lpc-section "><div class="lc-offsets" style="padding:36px 0px 16px 0px"><div class="lc-text lc-text_align_left"><div class="lc-text lc-text_column_xxl"><div class="lc-text-block lc-text-block_size_s40 lc-text-block_bpsize_s40 lc-text-block_font_display lc-text__title" style="--font-weight:500;--color:rgba(0, 0, 0, 1);--font-family:YS Display, Helvetica, Arial, sans-serif;--letter-spacing:normal;line-height:120%" aria-hidden="false"><div class="lc-styled-text"><h2 class="lc-styled-text__text lc-styled-text__text_align_left">Что такое SQL</h2></div></div><div class="lc-text-block lc-text-block_size_s20 lc-text-block_bpsize_s20 lc-text-block_font_text lc-text__text" style="--font-weight:400;--color:#2F2F2F;--font-family:YS Text, Helvetica, Arial, sans-serif;--letter-spacing:normal;line-height:28px" aria-hidden="false"><div class="lc-styled-text"><div class="lc-styled-text__text lc-styled-text__text_align_left">SQL (Structured Query Language) - это язык программирования, который используется для работы с базами данных. Он позволяет создавать, изменять и извлекать данные из баз данных, а также выполнять различные операции, такие как выборка, вставка, обновление и удаление данных. SQL является одним из самых популярных языков программирования для работы с базами данных, и он используется во многих приложениях, включая веб-сайты, мобильные приложения и корпоративные системы.</div></div></div></div></div></div></section></div><div class="lc-background-empty" data-image-src=""><section id="fichi-1" class="lc-section lc-section_is-expanded lpc-section "><div class="lc-offsets" style="padding:16px 0px 16px 0px"><div class="lc-features lc-features_align_left lc-features_columns_3 lc-features_has-breakpoints"><div class="lc-features__base-wrapper"><div class="lc-features__items"><section data-row="0_default" class="lc-features__item lc-features__col lc-features__col_3"><div class="lc-borders__advanced-borders-wrapper lc-features__with-borders" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div style="background-color:rgba(233, 242, 252, 1)" class="lc-features__item-wrap lc-features__item-wrap_no-overflow lc-features__item-wrap_feature-back lc-features__item-wrap_clickable"><div data-spacer-id="image" class="lc-features__spacer-wrapper"><div class="lc-features__image"><div class="lc-picture lc-picture_has-thumbnail lc-picture_migrated lc-features__image-el" style="width:100%"><div class="lc-borders__advanced-borders-wrapper" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div style="padding-bottom:43.697479%"><img class="lc-picture__full-size-block lc-picture__thumbnail lc-picture__thumbnail_pulsing_false" src="https://avatars.mds.yandex.net/get-lpc/1635340/58899313-e54c-4700-a1ae-7e6adc4ee7ad/lqip" width="1904" height="832" aria-hidden="true"/></div></div><div class="lc-borders__shadow" style="border-radius:12px"></div><div class="lc-borders__border" style="border-radius:12px"></div></div></div></div><div class="lc-features__spacer"></div></div><div data-spacer-id="title" class="lc-features__spacer-wrapper"><div class="lc-features__title"><header><div class="lc-text-block lc-text-block_size_s16 lc-text-block_bpsize_s16 lc-text-block_font_text" style="--font-weight:500;--color:rgba(0, 0, 0, 1);--font-family:YS Text, Helvetica, Arial, sans-serif;--letter-spacing:normal" aria-hidden="false"><div class="lc-styled-text"><div class="lc-styled-text__text lc-styled-text__text_align_left">Как устроен язык SQL и почему он так востребован</div></div></div></header></div><div class="lc-features__spacer"></div></div><a class="Link link lc-link lc-features__area-link" href="https://practicum.yandex.ru/blog/chto-takoe-sql/" data-clickable="true" tabindex="0" aria-label="Перейти" aria-hidden="false"></a></div></div><div class="lc-borders__shadow" style="border-radius:12px"></div><div class="lc-borders__border" style="border-radius:12px"></div></div></section></div></div></div></div></section></div><div class="lc-background-empty" data-image-src=""><section id="tipy-dannyh-i-operatory" class="lc-section lpc-section "><div class="lc-offsets" style="padding:16px 0px 16px 0px"><div class="lc-text lc-text_align_left"><div class="lc-text lc-text_column_xxl"><div class="lc-text-block lc-text-block_size_s40 lc-text-block_bpsize_s40 lc-text-block_font_display lc-text__title" style="--font-weight:500;--color:rgba(0, 0, 0, 1);--font-family:YS Display, Helvetica, Arial, sans-serif;--letter-spacing:normal;line-height:120%" aria-hidden="false"><div class="lc-styled-text"><h2 class="lc-styled-text__text lc-styled-text__text_align_left">Типы данных и операторы в SQL</h2></div></div><div class="lc-text-block lc-text-block_size_s20 lc-text-block_bpsize_s20 lc-text-block_font_text lc-text__text" style="--font-weight:400;--color:#2F2F2F;--font-family:YS Text, Helvetica, Arial, sans-serif;--letter-spacing:normal;line-height:28px" aria-hidden="false"><div class="lc-styled-text"><div class="lc-styled-text__text lc-styled-text__text_align_left">В SQL есть несколько типов данных и операторов, которые помогают в работе с базами данных. Типы данных включают числа, строки, даты, время, логические значения и бинарные данные. А операторы позволяют выполнять различные действия над этими данными, например, выбирать, вставлять, обновлять и удалять записи из базы данных.</div></div></div></div></div></div></section></div><div class="lc-background-empty" data-image-src=""><section id="fichi-6" class="lc-section lc-section_is-expanded lpc-section "><div class="lc-offsets" style="padding:16px 0px 16px 0px"><div class="lc-features lc-features_align_left lc-features_columns_3 lc-features_has-breakpoints"><div class="lc-features__base-wrapper"><div class="lc-features__items"><section data-row="0_default" class="lc-features__item lc-features__col lc-features__col_3"><div class="lc-borders__advanced-borders-wrapper lc-features__with-borders" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div style="background-color:rgba(233, 242, 252, 1)" class="lc-features__item-wrap lc-features__item-wrap_no-overflow lc-features__item-wrap_feature-back lc-features__item-wrap_clickable"><div data-spacer-id="image" class="lc-features__spacer-wrapper"><div class="lc-features__image"><div class="lc-picture lc-picture_has-thumbnail lc-picture_migrated lc-features__image-el" style="width:100%"><div class="lc-borders__advanced-borders-wrapper" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div style="padding-bottom:43.697479%"><img class="lc-picture__full-size-block lc-picture__thumbnail lc-picture__thumbnail_pulsing_false" src="https://avatars.mds.yandex.net/get-lpc/1635340/ddb79283-cd61-4797-81eb-33ea5b0473c1/lqip" width="952" height="416" aria-hidden="true"/></div></div><div class="lc-borders__shadow" style="border-radius:12px"></div><div class="lc-borders__border" style="border-radius:12px"></div></div></div></div><div class="lc-features__spacer"></div></div><div data-spacer-id="title" class="lc-features__spacer-wrapper"><div class="lc-features__title"><header><div class="lc-text-block lc-text-block_size_s16 lc-text-block_bpsize_s16 lc-text-block_font_text" style="--font-weight:500;--color:rgba(0, 0, 0, 1);--font-family:YS Text, Helvetica, Arial, sans-serif;--letter-spacing:normal" aria-hidden="false"><div class="lc-styled-text"><div class="lc-styled-text__text lc-styled-text__text_align_left">Типы данных SQL: что о них нужно знать начинающему аналитику</div></div></div></header></div><div class="lc-features__spacer"></div></div><a class="Link link lc-link lc-features__area-link" href="https://practicum.yandex.ru/blog/tipy-dannyh-sql/" data-clickable="true" tabindex="0" aria-label="Перейти" aria-hidden="false"></a></div></div><div class="lc-borders__shadow" style="border-radius:12px"></div><div class="lc-borders__border" style="border-radius:12px"></div></div></section><section data-row="0_default" class="lc-features__item lc-features__col lc-features__col_3"><div class="lc-borders__advanced-borders-wrapper lc-features__with-borders" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div style="background-color:rgba(233, 242, 252, 1)" class="lc-features__item-wrap lc-features__item-wrap_no-overflow lc-features__item-wrap_feature-back lc-features__item-wrap_clickable"><div data-spacer-id="image" class="lc-features__spacer-wrapper"><div class="lc-features__image"><div class="lc-picture lc-picture_has-thumbnail lc-picture_migrated lc-features__image-el" style="width:100%"><div class="lc-borders__advanced-borders-wrapper" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div style="padding-bottom:43.697479%"><img class="lc-picture__full-size-block lc-picture__thumbnail lc-picture__thumbnail_pulsing_false" src="https://avatars.mds.yandex.net/get-lpc/1635340/be5a841d-a049-4e1f-9083-948835947c0b/lqip" width="1904" height="832" aria-hidden="true"/></div></div><div class="lc-borders__shadow" style="border-radius:12px"></div><div class="lc-borders__border" style="border-radius:12px"></div></div></div></div><div class="lc-features__spacer"></div></div><div data-spacer-id="title" class="lc-features__spacer-wrapper"><div class="lc-features__title"><header><div class="lc-text-block lc-text-block_size_s16 lc-text-block_bpsize_s16 lc-text-block_font_text" style="--font-weight:500;--color:rgba(0, 0, 0, 1);--font-family:YS Text, Helvetica, Arial, sans-serif;--letter-spacing:normal" aria-hidden="false"><div class="lc-styled-text"><div class="lc-styled-text__text lc-styled-text__text_align_left">Базовые вопросы: как SQL помогает анализировать данные для бизнеса</div></div></div></header></div><div class="lc-features__spacer"></div></div><a class="Link link lc-link lc-features__area-link" href="https://practicum.yandex.ru/blog/operatory-sql/" data-clickable="true" tabindex="0" aria-label="Перейти" aria-hidden="false"></a></div></div><div class="lc-borders__shadow" style="border-radius:12px"></div><div class="lc-borders__border" style="border-radius:12px"></div></div></section><section id="ficha-1" data-row="0_default" class="lc-features__item lc-features__col lc-features__col_3"><div class="lc-borders__advanced-borders-wrapper lc-features__with-borders" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div style="background-color:rgba(233, 242, 252, 1)" class="lc-features__item-wrap lc-features__item-wrap_no-overflow lc-features__item-wrap_feature-back lc-features__item-wrap_clickable"><div data-spacer-id="image" class="lc-features__spacer-wrapper"><div class="lc-features__image"><div class="lc-picture lc-picture_has-thumbnail lc-picture_migrated lc-features__image-el" style="width:100%"><div class="lc-borders__advanced-borders-wrapper" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div style="padding-bottom:43.697479%"><img class="lc-picture__full-size-block lc-picture__thumbnail lc-picture__thumbnail_pulsing_false" src="https://avatars.mds.yandex.net/get-lpc/16904900/0158b066-5f40-474f-9af3-aa4def2824ef/lqip" width="1428" height="624" aria-hidden="true"/></div></div><div class="lc-borders__shadow" style="border-radius:12px"></div><div class="lc-borders__border" style="border-radius:12px"></div></div></div></div><div class="lc-features__spacer"></div></div><div data-spacer-id="title" class="lc-features__spacer-wrapper"><div class="lc-features__title"><header><div class="lc-text-block lc-text-block_size_s16 lc-text-block_bpsize_s16 lc-text-block_font_text" style="--font-weight:500;--color:rgba(0, 0, 0, 1);--font-family:YS Text, Helvetica, Arial, sans-serif;--letter-spacing:normal" aria-hidden="false"><div class="lc-styled-text"><div class="lc-styled-text__text lc-styled-text__text_align_left">Как работать с датами и временем в SQL (на примере PostgreSQL)</div></div></div></header></div><div class="lc-features__spacer"></div></div><a class="Link link lc-link lc-features__area-link" href="https://practicum.yandex.ru/blog/kak-rabotat-s-datoy-i-vremenem-v-sql/" data-clickable="true" tabindex="0" aria-label="Перейти" aria-hidden="false"></a></div></div><div class="lc-borders__shadow" style="border-radius:12px"></div><div class="lc-borders__border" style="border-radius:12px"></div></div></section></div></div></div></div></section></div><div class="lc-background-empty" data-image-src=""><section id="tablitcy-sql" class="lc-section lpc-section "><div class="lc-offsets" style="padding:16px 0px 16px 0px"><div class="lc-text lc-text_align_left"><div class="lc-text lc-text_column_xxl"><div class="lc-text-block lc-text-block_size_s40 lc-text-block_bpsize_s40 lc-text-block_font_display lc-text__title" style="--font-weight:500;--color:rgba(0, 0, 0, 1);--font-family:YS Display, Helvetica, Arial, sans-serif;--letter-spacing:normal;line-height:120%" aria-hidden="false"><div class="lc-styled-text"><h2 class="lc-styled-text__text lc-styled-text__text_align_left">Таблицы в SQL</h2></div></div><div class="lc-text-block lc-text-block_size_s20 lc-text-block_bpsize_s20 lc-text-block_font_text lc-text__text" style="--font-weight:400;--color:#2F2F2F;--font-family:YS Text, Helvetica, Arial, sans-serif;--letter-spacing:normal;line-height:28px" aria-hidden="false"><div class="lc-styled-text"><div class="lc-styled-text__text lc-styled-text__text_align_left">В мире баз данных таблицы играют ключевую роль, позволяя удобно хранить и обрабатывать информацию. В SQL есть разные типы таблиц: обычные, секционированные, временные, системные и широкие. Каждый тип имеет свои особенности и предназначен для разных задач. Мы рассмотрим, как создавать таблицы, как с ними работать и какие операции можно выполнять.</div></div></div></div></div></div></section></div><div class="lc-background-empty" data-image-src=""><section id="fichi-2" class="lc-section lc-section_is-expanded lpc-section "><div class="lc-offsets" style="padding:16px 0px 16px 0px"><div class="lc-features lc-features_align_left lc-features_columns_3 lc-features_has-breakpoints"><div class="lc-features__base-wrapper"><div class="lc-features__items"><section id="1" data-row="0_default" class="lc-features__item lc-features__col lc-features__col_3"><div class="lc-borders__advanced-borders-wrapper lc-features__with-borders" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div style="background-color:rgba(233, 242, 252, 1)" class="lc-features__item-wrap lc-features__item-wrap_no-overflow lc-features__item-wrap_feature-back lc-features__item-wrap_clickable"><div data-spacer-id="image" class="lc-features__spacer-wrapper"><div class="lc-features__image"><div class="lc-picture lc-picture_has-thumbnail lc-picture_migrated lc-features__image-el" style="width:100%"><div class="lc-borders__advanced-borders-wrapper" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div style="padding-bottom:43.697479%"><img class="lc-picture__full-size-block lc-picture__thumbnail lc-picture__thumbnail_pulsing_false" src="https://avatars.mds.yandex.net/get-lpc/10704932/95108543-cf15-4dfc-a1c1-8810c831fcb3/lqip" width="952" height="416" aria-hidden="true"/></div></div><div class="lc-borders__shadow" style="border-radius:12px"></div><div class="lc-borders__border" style="border-radius:12px"></div></div></div></div><div class="lc-features__spacer"></div></div><div data-spacer-id="title" class="lc-features__spacer-wrapper"><div class="lc-features__title"><header><div class="lc-text-block lc-text-block_size_s16 lc-text-block_bpsize_s16 lc-text-block_font_text" style="--font-weight:500;--color:rgba(0, 0, 0, 1);--font-family:YS Text, Helvetica, Arial, sans-serif;--letter-spacing:normal" aria-hidden="false"><div class="lc-styled-text"><div class="lc-styled-text__text lc-styled-text__text_align_left">Таблицы в SQL: типы и операции</div></div></div></header></div><div class="lc-features__spacer"></div></div><a class="Link link lc-link lc-features__area-link" href="https://practicum.yandex.ru/blog/tablicy-v-sql/" data-clickable="true" tabindex="0" aria-label="Перейти" aria-hidden="false"></a></div></div><div class="lc-borders__shadow" style="border-radius:12px"></div><div class="lc-borders__border" style="border-radius:12px"></div></div></section><section id="2" data-row="0_default" class="lc-features__item lc-features__col lc-features__col_3"><div class="lc-borders__advanced-borders-wrapper lc-features__with-borders" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div 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SQL является важным инструментом для работы аналитика, так как позволяет быстро и эффективно получать нужные данные из баз данных и использовать их для принятия решений.</div></div></div></div></div></div></section></div><div class="lc-background-empty" data-image-src=""><section id="fichi-4" class="lc-section lc-section_is-expanded lpc-section "><div class="lc-offsets" style="padding:16px 0px 16px 0px"><div class="lc-features lc-features_align_left lc-features_columns_3 lc-features_has-breakpoints"><div class="lc-features__base-wrapper"><div class="lc-features__items"><section data-row="0_default" class="lc-features__item lc-features__col lc-features__col_3"><div class="lc-borders__advanced-borders-wrapper lc-features__with-borders" style="border-radius:12px"><div class="lc-borders__component-wrapper" style="border-radius:12px"><div style="background-color:rgba(233, 242, 252, 1)" class="lc-features__item-wrap lc-features__item-wrap_no-overflow lc-features__item-wrap_feature-back 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Он нужен, чтобы создавать базы данных и управлять ими, суммировать, фильтровать, группировать и объединять данные из разных таблиц для отчетов. </span></span><br/></p></div></div></div></div></div></section></div><div class="visibility-actions visibility-actions_visible"><div class="lc-background-empty" data-image-src=""><section id="sql-data-analyst" class="lc-section lc-section_is-expanded lpc-section "><div class="lc-offsets" style="padding:0px 0px 0px 0px"><div class="lc-group"><div class="lc-group__content lc-group__content_justify_start lpc-section"><div class="lc-background-empty" data-image-src=""><section id="banner-course" class="lc-section lc-section_is-expanded lc-section_no-margins lpc-section "><div class="lc-offsets lc-grid2-offsets" style="padding:0px 0px 0px 0px"><div class="lc-grid2 lpc-section" style="row-gap:0px;column-gap:0px;grid-template-columns:calc((100% - 0px - (24px + 610px + 310px + 24px)) * 0.5) 24px 610px 310px 24px calc((100% - 0px - (24px + 610px + 310px 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