[jeeplus] 使用笔记 (gridSelect、datetimepicker etc.)
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PeterChu •作者
怎么让主附表中的附表也打开横向滚动条?
用 CSS 样式控制显示出来吗?尝试一下<style> .tab-content{ overflow-x: scroll; width: 3000px; } </style>
添加该样式后显示不正确。
暂且在 list.jsp 中添加:<style> .tabs-container .tab-content > .active, .tabs-container .pill-content > .active { display: block; overflow-x: auto; width: 3000px; } </style>
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PeterChu •作者
慎用
select *
当自己手写一些 sql 时,如果查找的对象/表中有封装了其他对象,那么,当 sql 中有
select *
时会导致封装对象为 Null 的现象。
因此,如果有会使用到封装的对象,那么 xml 中的 sql 还是加上映射关系吧。
eg:<!-- 根据年份、省份、高校、文理科、批次查找记录 findListByYPNWB --> <select id="findListByYPNWB" resultType="Eucode" > SELECT <include refid="EucodeColumns"/> FROM e_uecode a <include refid="EucodeJoins"/> WHERE a.year = #{year} AND a.province = #{province.id} AND a.universityid = #{university.id} AND a.wltype = #{wltype} AND a.schoolbatches = #{schoolBatches} AND (a.r3 != "2" OR ISNULL(a.r3)) AND (a.r3 != "3" OR ISNULL(a.r3)) </select>
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PeterChu • • 1 评论作者
Mysql 中对一个表中的字段进行汇总计算后 赋值给 其中一个字段
如:招生计划表中,按照年份、省份、批次、文理科、学校 分组汇总后,将各专业招生计划数汇总后,赋值给该校该年度该批次该省份该文理科中的 招生计划总数。
查询语句:
SELECT COUNT(zhaoshengjihua) AS jihuazongshu, zhaoshengjihuazongshu, shengfen, nianfen, wenlike, pici, daxuedaima, daxuemingcheng FROM d_zhaoshengjihuabiao GROUP BY shengfen, nianfen, wenlike, pici, daxuedaima;
*zhaoshengjihuazongshu 字段中已经被赋值了,原来该字段中的值为空最开始写出的 sql 如下,但是完全不正确。
UPDATE d_zhaoshengjihuabiao a SET a.zhaoshengjihuazongshu = ( SELECT COUNT(b.zhaoshengjihua) AS b.cou, b.shengfen, b.nianfen, b.wenlike, b.pici, b.daxuedaima FROM d_zhaoshengjihuabiao b GROUP BY b.shengfen, b.nianfen, b.wenlike, b.pici, b.daxuedaima ) WHERE b.shengfen = a.shengfen AND b.nianfen = a.nianfen AND b.wenlike = a.wenlike AND b.pici = a.pici AND b.daxuedaima = a.daxuedaima
在网上搜索后,看到如下 2 条 sql 做为参考:
-- 1 UPDATE au_window_re_project aw SET aw.project_name = ( SELECT ap.SERVICENAME FROM apas_service ap WHERE ap.unid = aw.PROJECT_ID ) -- 2 UPDATE test_user_points AS a LEFT JOIN ( SELECT user_id, sum(point) AS point_count FROM test_point_log GROUP BY user_id ) AS b ON a.user_id = b.user_id SET a.point_count = b.point_count
最终参考第 2 条 SQL 写出如下语句,可以实现要求:
UPDATE d_zhaoshengjihuabiao AS a LEFT JOIN ( SELECT COUNT(zhaoshengjihua) AS cou, shengfen, nianfen, wenlike, pici, daxuedaima FROM d_zhaoshengjihuabiao GROUP BY shengfen, nianfen, wenlike, pici, daxuedaima ) AS b ON ( a.shengfen = b.shengfen AND a.wenlike = b.wenlike AND a.nianfen = b.nianfen AND a.pici = b.pici AND a.daxuedaima = b.daxuedaima ) SET a.zhaoshengjihuazongshu = b.cou ;
最开始的 SQL 还不知道错在了哪里,应该是用子查询实现的呀PeterChu • - 查看全部回帖