{"id":143,"date":"2021-12-20T01:10:33","date_gmt":"2021-12-19T17:10:33","guid":{"rendered":"https:\/\/www.zhangshuwei.com\/?p=143"},"modified":"2021-12-20T01:10:33","modified_gmt":"2021-12-19T17:10:33","slug":"%e3%80%90mybatis-plus%e3%80%91sum%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b0%e7%9a%84%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.zhangshuwei.com\/index.php\/2021\/12\/20\/%e3%80%90mybatis-plus%e3%80%91sum%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b0%e7%9a%84%e4%bd%bf%e7%94%a8\/","title":{"rendered":"\u3010MyBatis-Plus\u3011sum\u805a\u5408\u51fd\u6570\u7684\u4f7f\u7528"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java\">\/\/ \u83b7\u53d6\u5408\u540c\u5305\u4e0b\u6240\u6709\u5408\u540c\u7684\u603b\u91d1\u989d\u4e4b\u548c\r\nQueryWrapper&lt;ContractMgt> contract_wrapper = new QueryWrapper&lt;ContractMgt>();\r\ncontract_wrapper.eq(\"package_id\", contractMgt.getPackageId());\r\ncontract_wrapper.select(\"ifnull(sum(amount_total),0) as total \");\r\nMap&lt;String, Object> map = contractMgtService.getMap(contract_wrapper);\r\n\t\t\r\nDouble package_total_amount = Double.valueOf(String.valueOf(map.get(\"total\")));\r\n<\/code><\/pre>\n\n\n\n<p>\u5bf9\u5e94\u7684SQL\u8bed\u53e5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"sql\" class=\"language-sql\">\rselect ifnull(sum(amount_total),0) as total\r\nfrom contract_mgt\r\nwhere package_id=2\r<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5bf9\u5e94\u7684SQL\u8bed\u53e5<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[39],"class_list":["post-143","post","type-post","status-publish","format-standard","hentry","category-databases","tag-mybatis-plus"],"_links":{"self":[{"href":"https:\/\/www.zhangshuwei.com\/index.php\/wp-json\/wp\/v2\/posts\/143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zhangshuwei.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangshuwei.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangshuwei.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangshuwei.com\/index.php\/wp-json\/wp\/v2\/comments?post=143"}],"version-history":[{"count":1,"href":"https:\/\/www.zhangshuwei.com\/index.php\/wp-json\/wp\/v2\/posts\/143\/revisions"}],"predecessor-version":[{"id":144,"href":"https:\/\/www.zhangshuwei.com\/index.php\/wp-json\/wp\/v2\/posts\/143\/revisions\/144"}],"wp:attachment":[{"href":"https:\/\/www.zhangshuwei.com\/index.php\/wp-json\/wp\/v2\/media?parent=143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangshuwei.com\/index.php\/wp-json\/wp\/v2\/categories?post=143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangshuwei.com\/index.php\/wp-json\/wp\/v2\/tags?post=143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}