要把图2显示成图1的方法:要用到stuff函数,并且图1显示的时间有所截断. 图2sql,只是很普通的sql ), SKSJ, )=' order by SKSJ 图1sql,用了stuff拼接 ), SKSJ, ),,) from Access_Statistics where SFZH=mj.SFZH and CONVERT(varchar(),SKSJ, )=, , '') from Access_Statistics mj inner join Readers dz on dz.SFZH…
原文地址:https://blog.csdn.net/u010673842/article/details/79637618 select ID, ,,'') from class a group by ID --测试 SQL GROUP 组字符串拼接 SELECT NCOMPONENTCODE, ,,'') AS NCOMPONENTCODES, ,,'') AS PROJECTNAMES from TB_PROJECTS10 a group by NCOMPONENTCODE --查看重复的…
Sql动态查询拼接字符串的优化 最原始的 直接写:string sql="select * from TestTables where 1=1";... 这样的代码效率很低的,这样影响了数据库的索引引用如下所示:private void TestOneMethod() { string querySql = "select * from TestTables where 1=1"; if (hasOneCo…