{"id":1045,"date":"2021-10-28T15:53:08","date_gmt":"2021-10-28T07:53:08","guid":{"rendered":"http:\/\/dba.qishuo.xin\/?p=1045"},"modified":"2021-10-28T16:56:46","modified_gmt":"2021-10-28T08:56:46","slug":"mariadb%e6%97%a5%e6%9c%9fsql%e6%95%b4%e7%90%86%ef%bc%9a%e4%bb%8a%e5%a4%a9%e3%80%81%e6%98%a8%e5%a4%a9%e3%80%81%e6%98%8e%e5%a4%a9%e3%80%81%e6%9c%88%e5%88%9d%e3%80%81%e6%9c%88%e6%9c%ab","status":"publish","type":"post","link":"http:\/\/dba.qishuo.xin\/?p=1045","title":{"rendered":"MariaDB\u65e5\u671fSQL\u6574\u7406\uff1a\u4eca\u5929\u3001\u6628\u5929\u3001\u660e\u5929\u3001\u6708\u521d\u3001\u6708\u672b"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-6a022ee930a3c\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a022ee930a3c\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#1_%E6%97%A5%E6%9C%9F%E5%87%BD%E6%95%B0%E4%BB%8B%E7%BB%8D\" >1. \u65e5\u671f\u51fd\u6570\u4ecb\u7ecd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#2_%E9%9D%9E%E5%A4%8D%E5%90%88%E5%9E%8B%E6%97%B6%E9%97%B4%E9%97%B4%E9%9A%94%E7%A4%BA%E4%BE%8B\" >2. \u975e\u590d\u5408\u578b\u65f6\u95f4\u95f4\u9694\u793a\u4f8b<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#21_%E5%BD%93%E5%89%8D%E6%97%A5%E6%9C%9F\" >2.1. \u5f53\u524d\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#22_%E6%98%8E%E5%A4%A9%E6%97%A5%E6%9C%9F\" >2.2. \u660e\u5929\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#23_%E6%98%A8%E5%A4%A9%E6%97%A5%E6%9C%9F\" >2.3. \u6628\u5929\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#24_%E5%89%8D%E4%B8%80%E4%B8%AA%E5%B0%8F%E6%97%B6%E6%97%B6%E9%97%B4\" >2.4. \u524d\u4e00\u4e2a\u5c0f\u65f6\u65f6\u95f4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#25_%E5%90%8E30%E5%88%86%E9%92%9F%E6%97%B6%E9%97%B4\" >2.5. \u540e30\u5206\u949f\u65f6\u95f4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#26_%E6%9C%AC%E6%9C%88%E6%9C%88%E5%88%9D%E6%97%A5%E6%9C%9F\" >2.6. \u672c\u6708\u6708\u521d\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#27_%E6%9C%AC%E6%9C%88%E6%9C%88%E6%9C%AB%E6%97%A5%E6%9C%9F\" >2.7. \u672c\u6708\u6708\u672b\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#28_%E4%B8%8A%E6%9C%88%E6%9C%88%E5%88%9D%E6%97%A5%E6%9C%9F\" >2.8. \u4e0a\u6708\u6708\u521d\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#29_%E4%B8%8A%E6%9C%88%E6%9C%88%E6%9C%AB%E6%97%A5%E6%9C%9F\" >2.9. \u4e0a\u6708\u6708\u672b\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#210_%E4%B8%8B%E6%9C%88%E6%9C%88%E5%88%9D%E6%97%A5%E6%9C%9F\" >2.10. \u4e0b\u6708\u6708\u521d\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#211_%E4%B8%8B%E6%9C%88%E6%9C%88%E6%9C%AB%E6%97%A5%E6%9C%9F\" >2.11. \u4e0b\u6708\u6708\u672b\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#212_%E6%9C%AC%E5%91%A8%E7%AC%AC%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\" >2.12. \u672c\u5468\u7b2c\u4e00\u5929\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#213_%E6%9C%AC%E5%91%A8%E6%9C%80%E5%90%8E%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\" >2.13. \u672c\u5468\u6700\u540e\u4e00\u5929\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#214_%E4%B8%8A%E5%91%A8%E7%AC%AC%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\" >2.14. \u4e0a\u5468\u7b2c\u4e00\u5929\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#215_%E4%B8%8A%E5%91%A8%E6%9C%80%E5%90%8E%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\" >2.15. \u4e0a\u5468\u6700\u540e\u4e00\u5929\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#216_%E6%9C%AC%E5%AD%A3%E5%BA%A6%E7%AC%AC%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\" >2.16. \u672c\u5b63\u5ea6\u7b2c\u4e00\u5929\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#217_%E6%9C%AC%E5%AD%A3%E5%BA%A6%E6%9C%80%E5%90%8E%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\" >2.17. \u672c\u5b63\u5ea6\u6700\u540e\u4e00\u5929\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#218_%E4%B8%8A%E5%AD%A3%E5%BA%A6%E7%AC%AC%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\" >2.18. \u4e0a\u5b63\u5ea6\u7b2c\u4e00\u5929\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#219_%E4%B8%8A%E5%AD%A3%E5%BA%A6%E6%9C%80%E5%90%8E%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\" >2.19. \u4e0a\u5b63\u5ea6\u6700\u540e\u4e00\u5929\u65e5\u671f<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"http:\/\/dba.qishuo.xin\/?p=1045\/#3_%E5%A4%8D%E5%90%88%E5%9E%8B%E6%97%B6%E9%97%B4%E9%97%B4%E9%9A%94%E7%A4%BA%E4%BE%8B\" >3. \u590d\u5408\u578b\u65f6\u95f4\u95f4\u9694\u793a\u4f8b<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"1_%E6%97%A5%E6%9C%9F%E5%87%BD%E6%95%B0%E4%BB%8B%E7%BB%8D\"><\/span>1. \u65e5\u671f\u51fd\u6570\u4ecb\u7ecd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>mysql\u4e2d\u5185\u7f6e\u51fd\u6570 <code>date_add<\/code> \u548c <code>date_sub<\/code>,\u4ed6\u4eec\u80fd\u5bf9\u6307\u5b9a\u7684\u65f6\u95f4\u8fdb\u884c\u589e\u52a0\u6216\u51cf\u5c11\u4e00\u4e2a\u6307\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\uff0c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-sql line-numbers\">DATE_ADD(date,INTERVAL expr type)\nDATE_SUB(date,INTERVAL expr type)\n<\/code><\/pre>\n<ul>\n<li><strong>DATE_SUB() \u51fd\u6570\u4ece\u65e5\u671f\u51cf\u53bb\u6307\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u3002<\/strong><\/li>\n<li><strong>DATE_ADD() \u51fd\u6570\u5411\u65e5\u671f\u6dfb\u52a0\u6307\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u3002<\/strong><\/li>\n<\/ul>\n<p>\u5176\u4e2ddate\u662f\u6307\u5b9a\u7684\u65e5\u671f\uff0cINTERVAL\u4e3a\u5173\u952e\u8bcd\uff0cexpr\u662f\u5177\u4f53\u7684\u65f6\u95f4\u95f4\u9694\uff0ctype\u662f\u65f6\u95f4\u5355\u4f4d\u3002\u6ce8\u610f\uff1atype\u53ef\u4ee5\u590d\u5408\u578b\u7684\uff0c\u6bd4\u5982 <code>YEAR_MONTH<\/code>\u3002<span style='color:red'> \u5982\u679ctype\u4e0d\u662f\u590d\u5408\u578b\u7684\uff0c<code>DATE_ADD<\/code>\u548c<code>DATE_SUB<\/code>\u5176\u5b9e\u53ef\u4ee5\u901a\u7528\uff0c\u56e0\u4e3aexpr\u53ef\u4ee5\u4e3a\u4e00\u4e2a\u8d1f\u6570\u3002<\/span> \u53ef\u7528\u7684type\u5982\u4e0b\u8868\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th align=\"left\">type<\/th>\n<th align=\"left\">\u65f6\u95f4\u542b\u4e49<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"left\">MICROSECOND<\/td>\n<td align=\"left\">\u95f4\u9694\u5355\u4f4d\uff1a\u6beb\u79d2<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">SECOND<\/td>\n<td align=\"left\">\u95f4\u9694\u5355\u4f4d\uff1a\u79d2<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">MINUTE<\/td>\n<td align=\"left\">\u95f4\u9694\u5355\u4f4d\uff1a\u5206\u949f<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">HOUR<\/td>\n<td align=\"left\">\u95f4\u9694\u5355\u4f4d\uff1a\u5c0f\u65f6<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">DAY<\/td>\n<td align=\"left\">\u95f4\u9694\u5355\u4f4d\uff1a\u5929<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">WEEK<\/td>\n<td align=\"left\">\u95f4\u9694\u5355\u4f4d\uff1a\u661f\u671f<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">MONTH<\/td>\n<td align=\"left\">\u95f4\u9694\u5355\u4f4d\uff1a\u6708<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">QUARTER<\/td>\n<td align=\"left\">\u95f4\u9694\u5355\u4f4d\uff1a\u5b63\u5ea6<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">YEAR<\/td>\n<td align=\"left\">\u95f4\u9694\u5355\u4f4d\uff1a\u5e74<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">SECOND_MICROSECOND<\/td>\n<td align=\"left\">\u590d\u5408\u578b\uff0c\u95f4\u9694\u5355\u4f4d\uff1a\u79d2\u3001\u6beb\u79d2\uff0cexpr\u53ef\u4ee5\u7528\u4e24\u4e2a\u503c\u6765\u5206\u522b\u6307\u5b9a\u79d2\u548c\u6beb\u79d2<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">MINUTE_MICROSECOND<\/td>\n<td align=\"left\">\u590d\u5408\u578b\uff0c\u95f4\u9694\u5355\u4f4d\uff1a\u5206\u3001\u6beb\u79d2<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">MINUTE_SECOND<\/td>\n<td align=\"left\">\u590d\u5408\u578b\uff0c\u95f4\u9694\u5355\u4f4d\uff1a\u5206\u3001\u79d2<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">HOUR_MICROSECOND<\/td>\n<td align=\"left\">\u590d\u5408\u578b\uff0c\u95f4\u9694\u5355\u4f4d\uff1a\u5c0f\u65f6\u3001\u6beb\u79d2<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">HOUR_SECOND<\/td>\n<td align=\"left\">\u590d\u5408\u578b\uff0c\u95f4\u9694\u5355\u4f4d\uff1a\u5c0f\u65f6\u3001\u79d2<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">HOUR_MINUTE<\/td>\n<td align=\"left\">\u590d\u5408\u578b\uff0c\u95f4\u9694\u5355\u4f4d\uff1a\u5c0f\u65f6\u5206<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">DAY_MICROSECOND<\/td>\n<td align=\"left\">\u590d\u5408\u578b\uff0c\u95f4\u9694\u5355\u4f4d\uff1a\u5929\u3001\u6beb\u79d2<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">DAY_SECOND<\/td>\n<td align=\"left\">\u590d\u5408\u578b\uff0c\u95f4\u9694\u5355\u4f4d\uff1a\u5929\u3001\u79d2<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">DAY_MINUTE<\/td>\n<td align=\"left\">\u590d\u5408\u578b\uff0c\u95f4\u9694\u5355\u4f4d\uff1a\u5929\u3001\u5206<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">DAY_HOUR<\/td>\n<td align=\"left\">\u590d\u5408\u578b\uff0c\u95f4\u9694\u5355\u4f4d\uff1a\u5929\u3001\u5c0f\u65f6<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">YEAR_MONTH<\/td>\n<td align=\"left\">\u590d\u5408\u578b\uff0c\u95f4\u9694\u5355\u4f4d\uff1a\u5e74\u3001\u6708<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"2_%E9%9D%9E%E5%A4%8D%E5%90%88%E5%9E%8B%E6%97%B6%E9%97%B4%E9%97%B4%E9%9A%94%E7%A4%BA%E4%BE%8B\"><\/span>2. \u975e\u590d\u5408\u578b\u65f6\u95f4\u95f4\u9694\u793a\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"21_%E5%BD%93%E5%89%8D%E6%97%A5%E6%9C%9F\"><\/span>2.1. \u5f53\u524d\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT CurDate();\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"22_%E6%98%8E%E5%A4%A9%E6%97%A5%E6%9C%9F\"><\/span>2.2. \u660e\u5929\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE_ADD(CurDate(), INTERVAL 1 DAY) ;\n\u6216\nSELECT DATE_SUB(CurDate(), INTERVAL -1 DAY) ;\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"23_%E6%98%A8%E5%A4%A9%E6%97%A5%E6%9C%9F\"><\/span>2.3. \u6628\u5929\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE_SUB(CurDate(), INTERVAL 1 DAY) ;\n\u6216\nSELECT DATE_ADD(CurDate(), INTERVAL -1 DAY) ;\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"24_%E5%89%8D%E4%B8%80%E4%B8%AA%E5%B0%8F%E6%97%B6%E6%97%B6%E9%97%B4\"><\/span>2.4. \u524d\u4e00\u4e2a\u5c0f\u65f6\u65f6\u95f4<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE_SUB(Now(), INTERVAL 1 HOUR);\n\u6216\nSELECT DATE_ADD(Now(), INTERVAL -1 HOUR);\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"25_%E5%90%8E30%E5%88%86%E9%92%9F%E6%97%B6%E9%97%B4\"><\/span>2.5. \u540e30\u5206\u949f\u65f6\u95f4<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE_ADD(Now(), INTERVAL 30 MINUTE);\n\u6216\nSELECT DATE_SUB(Now(), INTERVAL -30 MINUTE);\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"26_%E6%9C%AC%E6%9C%88%E6%9C%88%E5%88%9D%E6%97%A5%E6%9C%9F\"><\/span>2.6. \u672c\u6708\u6708\u521d\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE_ADD(CurDate(), INTERVAL - day(CurDate()) + 1 DAY);\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"27_%E6%9C%AC%E6%9C%88%E6%9C%88%E6%9C%AB%E6%97%A5%E6%9C%9F\"><\/span>2.7. \u672c\u6708\u6708\u672b\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT LAST_DAY(CurDate());\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"28_%E4%B8%8A%E6%9C%88%E6%9C%88%E5%88%9D%E6%97%A5%E6%9C%9F\"><\/span>2.8. \u4e0a\u6708\u6708\u521d\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE_ADD(CurDate() - DAY(CurDate()) + 1, INTERVAL -1 MONTH);\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"29_%E4%B8%8A%E6%9C%88%E6%9C%88%E6%9C%AB%E6%97%A5%E6%9C%9F\"><\/span>2.9. \u4e0a\u6708\u6708\u672b\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT LAST_DAY(DATE_SUB(Now(), INTERVAL 1 MONTH));\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"210_%E4%B8%8B%E6%9C%88%E6%9C%88%E5%88%9D%E6%97%A5%E6%9C%9F\"><\/span>2.10. \u4e0b\u6708\u6708\u521d\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE_ADD(CurDate() - DAY(CurDate()) + 1, INTERVAL 1 MONTH);\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"211_%E4%B8%8B%E6%9C%88%E6%9C%88%E6%9C%AB%E6%97%A5%E6%9C%9F\"><\/span>2.11. \u4e0b\u6708\u6708\u672b\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT LAST_DAY(DATE_SUB(Now(), INTERVAL -1 MONTH));\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"212_%E6%9C%AC%E5%91%A8%E7%AC%AC%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\"><\/span>2.12. \u672c\u5468\u7b2c\u4e00\u5929\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong>\u6ce8\uff1a\u4ee5\u661f\u671f\u4e00\u4e3a\u672c\u5468\u7684\u7b2c\u4e00\u5929\uff0c\u4e0b\u540c\u3002<\/strong><\/p>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE_SUB(CurDate(),INTERVAL WEEKDAY(CurDate()) DAY);\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"213_%E6%9C%AC%E5%91%A8%E6%9C%80%E5%90%8E%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\"><\/span>2.13. \u672c\u5468\u6700\u540e\u4e00\u5929\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE_SUB(CurDate(), INTERVAL WEEKDAY(CurDate()) - 6 DAY);\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"214_%E4%B8%8A%E5%91%A8%E7%AC%AC%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\"><\/span>2.14. \u4e0a\u5468\u7b2c\u4e00\u5929\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE_SUB(CurDate(),INTERVAL WEEKDAY(CurDate()) + 7 DAY)\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"215_%E4%B8%8A%E5%91%A8%E6%9C%80%E5%90%8E%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\"><\/span>2.15. \u4e0a\u5468\u6700\u540e\u4e00\u5929\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE_SUB(CurDate(),INTERVAL WEEKDAY(CurDate()) + 1 DAY);\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"216_%E6%9C%AC%E5%AD%A3%E5%BA%A6%E7%AC%AC%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\"><\/span>2.16. \u672c\u5b63\u5ea6\u7b2c\u4e00\u5929\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE(concat(YEAR(CurDate()),'-', elt(QUARTER(CurDate()),1,4,7,10),'-',1));\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"217_%E6%9C%AC%E5%AD%A3%E5%BA%A6%E6%9C%80%E5%90%8E%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\"><\/span>2.17. \u672c\u5b63\u5ea6\u6700\u540e\u4e00\u5929\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT LAST_DAY(MAKEDATE(EXTRACT(YEAR FROM CURDATE()),1) + INTERVAL QUARTER(CURDATE()) * 3 - 1 MONTH);\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"218_%E4%B8%8A%E5%AD%A3%E5%BA%A6%E7%AC%AC%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\"><\/span>2.18. \u4e0a\u5b63\u5ea6\u7b2c\u4e00\u5929\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT DATE(concat(date_format(LAST_DAY(MAKEDATE(EXTRACT(YEAR FROM CURDATE()),1) + INTERVAL QUARTER(CURDATE()) * 3 - 6 month),'%Y-%m-'),'01'));\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"219_%E4%B8%8A%E5%AD%A3%E5%BA%A6%E6%9C%80%E5%90%8E%E4%B8%80%E5%A4%A9%E6%97%A5%E6%9C%9F\"><\/span>2.19. \u4e0a\u5b63\u5ea6\u6700\u540e\u4e00\u5929\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-sql line-numbers\">SELECT LAST_DAY(MAKEDATE(EXTRACT(YEAR FROM CURDATE()),1) + INTERVAL QUARTER(CurDate()) * 3 - 4 MONTH);\n<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"3_%E5%A4%8D%E5%90%88%E5%9E%8B%E6%97%B6%E9%97%B4%E9%97%B4%E9%9A%94%E7%A4%BA%E4%BE%8B\"><\/span>3. \u590d\u5408\u578b\u65f6\u95f4\u95f4\u9694\u793a\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5bf9\u5e94\u590d\u5408\u578b\u7684type\uff0c\u9700\u8981\u4f7f\u7528\u5f15\u53f7\u5bf9\u4e24\u4e2a\u53c2\u6570\u8fdb\u884c\u5f15\u7528\u8d77\u6765\uff0c\u4e2d\u95f4\u7528\u4efb\u4f55\u975e\u6570\u5b57\u5b57\u7b26\u4f5c\u4e3a\u95f4\u9694\u5373\u53ef\uff0c\u5e76\u4e14\u4e0d\u80fd\u4f7f\u7528\u8d1f\u6570\u3002\u5982\u679c\u65f6\u95f4\u95f4\u9694\u53ea\u6307\u5b9a\u4e86\u4e00\u4e2a\u503c\uff0c\u4e5f\u80fd\u6b63\u5e38\u5de5\u4f5c\uff0c\u4f46\u662f\u5bf9\u5e94XXX_YYY\u4f7f\u7528\u7684\u5355\u4f4d\u4e3aYYY\uff0c\u4e5f\u5c31\u76f8\u5f53\u4e8e\u5355\u4e00\u5355\u4f4d\u7684type\uff0c\u540c\u65f6\u53ef\u4ee5\u4f7f\u7528\u8d1f\u6570\u3002<\/p>\n<pre><code class=\"language-sql line-numbers\">mysql&gt; SELECT DATE_ADD('2013-01-18', INTERVAL '1 2' YEAR_MONTH);\n+-----------------------------------------------------+\n| date_add('2013-01-18', interval '1 2' YEAR_MONTH) |\n+-----------------------------------------------------+\n| 2014-03-18                                          |\n+-----------------------------------------------------+\nmysql&gt; SELECT DATE_ADD('2013-01-18', INTERVAL '1-2' YEAR_MONTH);\n+----------------------------------------------------+\n| date_add('2013-01-18', interval '1-2' YEAR_MONTH) |\n+----------------------------------------------------+\n| 2014-03-18                                         |\n+----------------------------------------------------+\nmysql&gt; SELECT DATE_ADD('2013-01-18', INTERVAL '1,2' YEAR_MONTH);\n+---------------------------------------------------+\n| date_add('2013-01-18', interval '1,2' YEAR_MONTH) |\n+---------------------------------------------------+\n| 2014-03-18                                        |\n+---------------------------------------------------+\nmysql&gt; SELECT DATE_ADD('2013-01-18', INTERVAL 1 YEAR_MONTH);\n+-----------------------------------------------+\n| date_add('2013-01-18', interval 1 YEAR_MONTH) |\n+-----------------------------------------------+\n| 2013-02-18                                    |\n+-----------------------------------------------+\nmysql&gt; SELECT DATE_ADD('2013-01-18', INTERVAL -1 YEAR_MONTH);\n+------------------------------------------------+\n| date_add('2013-01-18', interval -1 YEAR_MONTH) |\n+------------------------------------------------+\n| 2012-12-18                                     |\n+------------------------------------------------+\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>1. \u65e5\u671f\u51fd\u6570\u4ecb\u7ecd mysql\u4e2d\u5185\u7f6e\u51fd\u6570 date&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39,3],"tags":[12,143],"class_list":["post-1045","post","type-post","status-publish","format-standard","hentry","category-mariadb-sql","category-mariadbmysql","tag-mariadb","tag-sql"],"_links":{"self":[{"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/posts\/1045","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1045"}],"version-history":[{"count":10,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/posts\/1045\/revisions"}],"predecessor-version":[{"id":1057,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/posts\/1045\/revisions\/1057"}],"wp:attachment":[{"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1045"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1045"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1045"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}