{"id":794,"date":"2021-07-08T08:09:04","date_gmt":"2021-07-08T08:09:04","guid":{"rendered":"https:\/\/www.bearloga.space\/?page_id=794"},"modified":"2021-07-08T08:27:17","modified_gmt":"2021-07-08T08:27:17","slug":"funkczii-dlya-raboty-s-chislami","status":"publish","type":"page","link":"https:\/\/www.bearloga.space\/uk\/funkczii-dlya-raboty-s-chislami\/","title":{"rendered":"\u0424\u0443\u043d\u043a\u0446\u0438\u0438 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0447\u0438\u0441\u043b\u0430\u043c\u0438"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u0414\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0447\u0438\u0441\u043b\u043e\u0432\u044b\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u043c\u0438 MySQL \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0440\u044f\u0434 \u0444\u0443\u043d\u043a\u0446\u0438\u0439:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>ROUND<\/strong>: \u043e\u043a\u0440\u0443\u0433\u043b\u044f\u0435\u0442 \u0447\u0438\u0441\u043b\u043e. \u0412 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043f\u0435\u0440\u0432\u043e\u0433\u043e \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430 \u043f\u0435\u0440\u0435\u0434\u0430\u0435\u0442\u0441\u044f \u0447\u0438\u0441\u043b\u043e. \u0412\u0442\u043e\u0440\u043e\u0439 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440 \u0443\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442 \u043d\u0430 \u0434\u043b\u0438\u043d\u0443. \u0415\u0441\u043b\u0438 \u0434\u043b\u0438\u043d\u0430 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u043f\u043e\u043b\u043e\u0436\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u0447\u0438\u0441\u043b\u043e, \u0442\u043e \u043e\u043d\u043e \u0443\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442, \u0434\u043e \u043a\u0430\u043a\u043e\u0439 \u0446\u0438\u0444\u0440\u044b \u043f\u043e\u0441\u043b\u0435 \u0437\u0430\u043f\u044f\u0442\u043e\u0439 \u0438\u0434\u0435\u0442 \u043e\u043a\u0440\u0443\u0433\u043b\u0435\u043d\u0438\u0435. \u0415\u0441\u043b\u0438 \u0434\u043b\u0438\u043d\u0430 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u043e\u0442\u0440\u0438\u0446\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u0447\u0438\u0441\u043b\u043e, \u0442\u043e \u043e\u043d\u043e \u0443\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442, \u0434\u043e \u043a\u0430\u043a\u043e\u0439 \u0446\u0438\u0444\u0440\u044b \u0441 \u043a\u043e\u043d\u0446\u0430 \u0447\u0438\u0441\u043b\u0430 \u0434\u043e \u0437\u0430\u043f\u044f\u0442\u043e\u0439 \u0438\u0434\u0435\u0442 \u043e\u043a\u0440\u0443\u0433\u043b\u0435\u043d\u0438\u043512<code>SELECT<\/code> <code>ROUND(1342.345, 2),&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- 1342.35<\/code><code>(<\/code><code>SELECT<\/code> <code>ROUND(1342.345, -2));&nbsp;&nbsp; <\/code><code>-- 1300;<\/code><\/li><li><strong>TRUNCATE<\/strong>: \u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0432 \u0434\u0440\u043e\u0431\u043d\u043e\u0439 \u0447\u0430\u0441\u0442\u0438 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0435 \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u0441\u0438\u043c\u0432\u043e\u043b\u043e\u04321<code>SELECT<\/code> <code>TRUNCATE<\/code><code>(1342.345, 2);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- 1342.34<\/code><\/li><li><strong>ABS<\/strong>: \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u0430\u0431\u0441\u043e\u043b\u044e\u0442\u043d\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0447\u0438\u0441\u043b\u0430.1<code>SELECT<\/code> <code>ABS<\/code><code>(-123)&nbsp;&nbsp;&nbsp; <\/code><code>-- 123<\/code><\/li><li><strong>CEILING<\/strong>: \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u043d\u0430\u0438\u043c\u0435\u043d\u044c\u0448\u0435\u0435 \u0446\u0435\u043b\u043e\u0435 \u0447\u0438\u0441\u043b\u043e, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u0431\u043e\u043b\u044c\u0448\u0435 \u0438\u043b\u0438 \u0440\u0430\u0432\u043d\u043e \u0442\u0435\u043a\u0443\u0449\u0435\u043c\u0443 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044e.12<code>SELECT<\/code> <code>CEILING(-123.45),&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- -123<\/code><code>(<\/code><code>SELECT<\/code> <code>CEILING(123.45));&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- 124<\/code><\/li><li><strong>FLOOR<\/strong>: \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u043d\u0430\u0438\u0431\u043e\u043b\u044c\u0448\u0435\u0435 \u0446\u0435\u043b\u043e\u0435 \u0447\u0438\u0441\u043b\u043e, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u043c\u0435\u043d\u044c\u0448\u0435 \u0438\u043b\u0438 \u0440\u0430\u0432\u043d\u043e \u0442\u0435\u043a\u0443\u0449\u0435\u043c\u0443 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044e.12<code>SELECT<\/code> <code>FLOOR(-123.45),&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- -124<\/code><code>(<\/code><code>SELECT<\/code> <code>FLOOR(123.45));&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- 123<\/code><\/li><li><strong>POWER<\/strong>: \u0432\u043e\u0437\u0432\u043e\u0434\u0438\u0442 \u0447\u0438\u0441\u043b\u043e \u0432 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u0443\u044e \u0441\u0442\u0435\u043f\u0435\u043d\u044c.12<code>SELECT<\/code> <code>POWER(5, 2),&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- 25<\/code><code>(<\/code><code>SELECT<\/code> <code>POWER(5, 3));&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- 125<\/code><\/li><li><strong>SQRT<\/strong>: \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u0442 \u043a\u0432\u0430\u0434\u0440\u0430\u0442\u043d\u044b\u0439 \u043a\u043e\u0440\u0435\u043d\u044c \u0447\u0438\u0441\u043b\u0430.1<code>SELECT<\/code> <code>SQRT(225);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- 15<\/code><\/li><li><strong>SIGN<\/strong>: \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 -1, \u0435\u0441\u043b\u0438 \u0447\u0438\u0441\u043b\u043e \u043c\u0435\u043d\u044c\u0448\u0435 0, \u0438 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 1, \u0435\u0441\u043b\u0438 \u0447\u0438\u0441\u043b\u043e \u0431\u043e\u043b\u044c\u0448\u0435 0. \u0415\u0441\u043b\u0438 \u0447\u0438\u0441\u043b\u043e \u0440\u0430\u0432\u043d\u043e 0, \u0442\u043e \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 0.12<code>SELECT<\/code> <code>SIGN(-5),&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- -1<\/code><code>(<\/code><code>SELECT<\/code> <code>SIGN(7));&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- 1<\/code><\/li><li><strong>RAND<\/strong>: \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0443\u0435\u0442 \u0441\u043b\u0443\u0447\u0430\u0439\u043d\u043e\u0435 \u0447\u0438\u0441\u043b\u043e \u0441 \u043f\u043b\u0430\u0432\u0430\u044e\u0449\u0435\u0439 \u0442\u043e\u0447\u043a\u043e\u0439 \u0432 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d\u0435 \u043e\u0442 0 \u0434\u043e 1.12<code>SELECT<\/code> <code>RAND();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- 0.707365088352935<\/code><code>SELECT<\/code> <code>RAND();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/code><code>-- 0.173808327956812<\/code><\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432\u043e\u0437\u044c\u043c\u0435\u043c \u0442\u0430\u0431\u043b\u0438\u0446\u0443:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>1<br>2<br>3<br>4<br>5<br>6<br>7<br>8<\/td><td><code>CREATE<\/code> <code>TABLE<\/code> <code>Products<\/code><br><code>(<\/code><br><code>Id INT<\/code> <code>AUTO_INCREMENT PRIMARY<\/code> <code>KEY,<\/code><br><code>ProductName VARCHAR(30) NOT<\/code> <code>NULL,<\/code><br><code>Manufacturer VARCHAR(20) NOT<\/code> <code>NULL,<\/code><br><code>ProductCount INT<\/code> <code>DEFAULT<\/code> <code>0,<\/code><br><code>Price DECIMAL<\/code> <code>NOT<\/code> <code>NULL<\/code><br><code>);<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u043a\u0440\u0443\u0433\u043b\u0438\u043c \u043f\u0440\u043e\u0438\u0437\u0432\u0435\u0434\u0435\u043d\u0438\u0435 \u0446\u0435\u043d\u044b \u0442\u043e\u0432\u0430\u0440\u0430 \u043d\u0430 \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u044d\u0442\u043e\u0433\u043e \u0442\u043e\u0432\u0430\u0440\u0430:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>1<br>2<\/td><td><code>SELECT<\/code> <code>ProductName, ROUND(Price * ProductCount, 2)<\/code><br><code>FROM<\/code> <code>Products;<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u0414\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0447\u0438\u0441\u043b\u043e\u0432\u044b\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u043c\u0438 MySQL \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0440\u044f\u0434 \u0444\u0443\u043d\u043a\u0446\u0438\u0439: ROUND: \u043e\u043a\u0440\u0443\u0433\u043b\u044f\u0435\u0442 \u0447\u0438\u0441\u043b\u043e. \u0412 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043f\u0435\u0440\u0432\u043e\u0433\u043e \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430 \u043f\u0435\u0440\u0435\u0434\u0430\u0435\u0442\u0441\u044f \u0447\u0438\u0441\u043b\u043e. \u0412\u0442\u043e\u0440\u043e\u0439 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[75],"tags":[],"class_list":["post-794","page","type-page","status-publish","hentry","category-rukovodstvo-po-mysql"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages\/794","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/comments?post=794"}],"version-history":[{"count":0,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages\/794\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/media?parent=794"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/categories?post=794"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/tags?post=794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}