Firebird 同一字段的多行合并为一行用LIST函数类似于MYSQL的GROUP_CONCAT. 具体用法如下: SELECT LIST(a.GG_NAME||':'||a.GG_VALUE) as GuiGEName, a.SP_IDFROM SP_GUIGE a group by a.SP_ID
(转载)http://blog.csdn.net/wxwstrue/article/details/6784774 Union all join 是平行合并 为水平连接 Union all 是垂直合并 是将两个结果联结起来 Union all 的语法: [SQL 语句 1] Union all [SQL 语句 2] Union 语法跟Union all 一样 Union 会排除重复记录 效果类似 DISTINCT *----------------------------- 合并数据集合的理论基
using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Drawing.Design; using System.Windows.Forms; /// <summary> /// DataGridView行合并.请对属性MergeColumnNames 赋值既可 /// </summary> public parti