{"id":679,"date":"2019-04-11T09:35:54","date_gmt":"2019-04-11T09:35:54","guid":{"rendered":"http:\/\/lg.yusemo.com\/?p=679"},"modified":"2019-04-11T09:37:12","modified_gmt":"2019-04-11T09:37:12","slug":"mysqlzhongnowhesysdatedequbie","status":"publish","type":"post","link":"https:\/\/lg.yusemo.com\/?p=679","title":{"rendered":"mysql\u4e2dNOW()\u548cSYSDATE()\u7684\u533a\u522b"},"content":{"rendered":"\n<p>mysql\u4e2d\u65e5\u671f\u51fd\u6570\u8fd8\u662f\u6bd4\u8f83\u5e38\u7528\u7684\u3002\u4e3b\u8981\u6709NOW()\u548cSYSDATE()\u4e24\u79cd\uff0c\u867d\u7136\u90fd\u8868\u793a\u5f53\u524d\u65f6\u95f4\uff0c\u4f46\u4f7f\u7528\u4e0a\u6709\u4e00\u70b9\u70b9\u533a\u522b\u3002<\/p>\n\n\n\n<p>NOW()\u53d6\u7684\u662f\u8bed\u53e5\u5f00\u59cb\u6267\u884c\u7684\u65f6\u95f4\uff0cSYSDATE()\u53d6\u7684\u662f\u52a8\u6001\u7684\u5b9e\u65f6\u65f6\u95f4\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p><a href=\"https:\/\/dev.mysql.com\/doc\/refman\/5.5\/en\/date-and-time-functions.html#function_now\"><code>NOW()<\/code><\/a>\u00a0returns a constant time that indicates the time at which the statement began to execute. (Within a stored function or trigger,\u00a0<a href=\"https:\/\/dev.mysql.com\/doc\/refman\/5.5\/en\/date-and-time-functions.html#function_now\"><code>NOW()<\/code><\/a>\u00a0returns the time at which the function or triggering statement began to execute.) This differs from the behavior for\u00a0<a href=\"https:\/\/dev.mysql.com\/doc\/refman\/5.5\/en\/date-and-time-functions.html#function_sysdate\"><code>SYSDATE()<\/code><\/a>, which returns the exact time at which it executes.<\/p><cite><a href=\"https:\/\/dev.mysql.com\/doc\/refman\/5.5\/en\/date-and-time-functions.html#function_now\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">https:\/\/dev.mysql.com\/doc\/refman\/5.5\/en\/date-and-time-functions.html#function_now<\/a><\/cite><\/blockquote>\n\n\n\n<p>\u5982\u4e0b\u6267\u884c\u793a\u4f8b<\/p>\n\n\n\n<p>SELECT NOW(),LOCALTIME(),LOCALTIMESTAMP,SYSDATE(),SLEEP(3),NOW(),LOCALTIME(),LOCALTIMESTAMP(),SYSDATE()<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" loading=\"lazy\" width=\"1269\" height=\"157\" src=\"http:\/\/lg.yusemo.com\/wp-content\/uploads\/2019\/04\/image-9.png\" alt=\"\" class=\"wp-image-680\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>mysql\u4e2d\u65e5\u671f\u51fd\u6570\u8fd8\u662f\u6bd4\u8f83\u5e38\u7528\u7684\u3002\u4e3b\u8981\u6709NOW()\u548cSYSDATE()\u4e24\u79cd\uff0c\u867d\u7136\u90fd\u8868\u793a\u5f53\u524d\u65f6\u95f4\uff0c\u4f46\u4f7f\u7528\u4e0a\u6709\u4e00\u70b9\u70b9\u533a\u522b\u3002 NOW()\u53d6\u7684\u662f\u8bed\u53e5\u5f00\u59cb\u6267\u884c\u7684\u65f6\u95f4\uff0cSYSDATE()\u53d6\u7684\u662f\u52a8\u6001\u7684\u5b9e\u65f6\u65f6\u95f4\u3002 NOW()\u00a0returns a constant time that indicates the t&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[45],"tags":[44],"_links":{"self":[{"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/posts\/679"}],"collection":[{"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=679"}],"version-history":[{"count":1,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/posts\/679\/revisions"}],"predecessor-version":[{"id":681,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/posts\/679\/revisions\/681"}],"wp:attachment":[{"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=679"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=679"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=679"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}