{"id":5524,"date":"2023-02-22T11:50:13","date_gmt":"2023-02-22T11:50:13","guid":{"rendered":"https:\/\/otus.ru\/journal\/?p=5524"},"modified":"2023-02-22T11:50:14","modified_gmt":"2023-02-22T11:50:14","slug":"null-v-sql","status":"publish","type":"post","link":"https:\/\/otus.ru\/journal\/null-v-sql\/","title":{"rendered":"NULL \u0432 SQL"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u0417\u0430\u043f\u0438\u0441\u044c \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0433\u043e \u0443\u0440\u043e\u043a\u0430 \u043e\u043d\u043b\u0430\u0439\u043d-\u043a\u0443\u0440\u0441\u0430 <a href=\"https:\/\/otus.ru\/lessons\/postgresql-dba\/?utm_source=oj&amp;utm_medium=affilate&amp;utm_campaign=postgre-basic&amp;mxm=[[hash_metrika]]&amp;relogin=True&amp;token=[[token]]\" target=\"_blank\" rel=\"noopener\" title=\"\u00abPostgreSQL \u0434\u043b\u044f \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u043e\u0432 \u0431\u0430\u0437 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432\u00bb\">\u00abPostgreSQL \u0434\u043b\u044f \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u043e\u0432 \u0431\u0430\u0437 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432\u00bb<\/a><\/h2>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"NULL \u0432 SQL \/\/ \u0414\u0435\u043c\u043e-\u0437\u0430\u043d\u044f\u0442\u0438\u0435 \u043a\u0443\u0440\u0441\u0430 \u00abPostgreSQL \u0434\u043b\u044f \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u043e\u0432 \u0431\u0430\u0437 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432\u00bb\" width=\"770\" height=\"433\" src=\"https:\/\/www.youtube.com\/embed\/hskcEB3EuPU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>NULL \u0432 SQL \u2014 \u044d\u0442\u043e \u043e\u0434\u043d\u0430 \u0438\u0437 \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043d\u0435\u043e\u0434\u043d\u043e\u0437\u043d\u0430\u0447\u043d\u044b\u0445 \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u0439, \u0441 \u043a\u043e\u0442\u043e\u0440\u044b\u043c\u0438 \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u043e \u0441\u0442\u0430\u043b\u043a\u0438\u0432\u0430\u044e\u0442\u0441\u044f \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u0431\u0430\u0437 \u0434\u0430\u043d\u043d\u044b\u0445. \u0420\u0430\u0437\u0431\u0435\u0440\u0435\u043c\u0441\u044f \u0436\u0435 \u0432 \u043d\u0435\u043e\u0434\u043d\u043e\u0437\u043d\u0430\u0447\u043d\u043e\u0439 \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u0438.<\/p>\n\n\n\n<p>\u0427\u0442\u043e \u0431\u044b\u043b\u043e \u043d\u0430 \u044d\u0442\u043e\u043c \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0443\u0440\u043e\u043a\u0435:<\/p>\n\n\n\n<p>\u2014 \u041e\u0431\u0441\u0443\u0434\u0438\u043b\u0438, \u043a\u0430\u043a\u0438\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0447\u0430\u0449\u0435 \u0432\u0441\u0435\u0433\u043e \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u044e\u0442 \u043f\u0440\u0438 \u0440\u0430\u0431\u043e\u0442\u0435 \u0441 NULL.<br>\u2014 \u0421\u0440\u0430\u0432\u043d\u0438\u043b\u0438 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e NULL \u0432 SQL \u0441 \u0435\u0433\u043e \u0442\u0451\u0437\u043a\u0430\u043c\u0438 \u0432 \u0440\u0430\u0437\u043d\u044b\u0445 \u044f\u0437\u044b\u043a\u0430\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f.<br>\u2014 \u0420\u0430\u0437\u043e\u0431\u0440\u0430\u043b\u0438 \u0447\u0451\u0442\u043a\u0438\u0435 (\u0438 \u043d\u0435 \u043e\u0447\u0435\u043d\u044c) \u043f\u0440\u0430\u0432\u0438\u043b\u0430 \u0440\u0430\u0431\u043e\u0442\u044b \u0441 NULL.<br>\u2014 \u041d\u0430\u0443\u0447\u0438\u043b\u0438\u0441\u044c \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0435\u0433\u043e \u043f\u0440\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0438 \u0431\u0430\u0437 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u0440\u0430\u0431\u043e\u0442\u0435 \u0441 \u043d\u0438\u043c\u0438.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>\u0421\u043f\u0438\u043a\u0435\u0440:<\/strong> \u0414\u043c\u0438\u0442\u0440\u0438\u0439 \u041a\u0438\u0440\u0438\u043b\u043b\u043e\u0432, \u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0434\u0438\u0440\u0435\u043a\u0442\u043e\u0440 1\u0421-\u0421\u0442\u0430\u0440\u0442<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0417\u0430\u043f\u0438\u0441\u044c \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0433\u043e \u0443\u0440\u043e\u043a\u0430 \u043e\u043d\u043b\u0430\u0439\u043d-\u043a\u0443\u0440\u0441\u0430 \u00abPostgreSQL \u0434\u043b\u044f \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u043e\u0432 \u0431\u0430\u0437 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432\u00bb NULL \u0432 SQL \u2014 \u044d\u0442\u043e \u043e\u0434\u043d\u0430 \u0438\u0437 \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043d\u0435\u043e\u0434\u043d\u043e\u0437\u043d\u0430\u0447\u043d\u044b\u0445 \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u0439, \u0441 \u043a\u043e\u0442\u043e\u0440\u044b\u043c\u0438 \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u043e \u0441\u0442\u0430\u043b\u043a\u0438\u0432\u0430\u044e\u0442\u0441\u044f \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u0431\u0430\u0437 \u0434\u0430\u043d\u043d\u044b\u0445. \u0420\u0430\u0437\u0431\u0435\u0440\u0435\u043c\u0441\u044f \u0436\u0435 \u0432 \u043d\u0435\u043e\u0434\u043d\u043e\u0437\u043d\u0430\u0447\u043d\u043e\u0439 \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u0438. \u0427\u0442\u043e \u0431\u044b\u043b\u043e \u043d\u0430 \u044d\u0442\u043e\u043c \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0443\u0440\u043e\u043a\u0435: \u2014 \u041e\u0431\u0441\u0443\u0434\u0438\u043b\u0438, \u043a\u0430\u043a\u0438\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0447\u0430\u0449\u0435 \u0432\u0441\u0435\u0433\u043e \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u044e\u0442 \u043f\u0440\u0438 \u0440\u0430\u0431\u043e\u0442\u0435 \u0441 NULL.\u2014 \u0421\u0440\u0430\u0432\u043d\u0438\u043b\u0438 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e NULL \u0432 SQL<\/p>\n","protected":false},"author":10,"featured_media":5525,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[38,226],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/otus.ru\/journal\/wp-json\/wp\/v2\/posts\/5524"}],"collection":[{"href":"https:\/\/otus.ru\/journal\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/otus.ru\/journal\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/otus.ru\/journal\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/otus.ru\/journal\/wp-json\/wp\/v2\/comments?post=5524"}],"version-history":[{"count":1,"href":"https:\/\/otus.ru\/journal\/wp-json\/wp\/v2\/posts\/5524\/revisions"}],"predecessor-version":[{"id":5526,"href":"https:\/\/otus.ru\/journal\/wp-json\/wp\/v2\/posts\/5524\/revisions\/5526"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/otus.ru\/journal\/wp-json\/wp\/v2\/media\/5525"}],"wp:attachment":[{"href":"https:\/\/otus.ru\/journal\/wp-json\/wp\/v2\/media?parent=5524"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/otus.ru\/journal\/wp-json\/wp\/v2\/categories?post=5524"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/otus.ru\/journal\/wp-json\/wp\/v2\/tags?post=5524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}