using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using CYSoft.UI.Common; using CYSoft.Common; using CYSoft.TS.Entit
1.去重语句:DELETE FROM `v_klg_item` WHERE id NOT IN (SELECT * FROM (SELECT MAX(id) FROM `v_klg_item` GROUP BY NAME) AS tmp); 2.数据库不同表之间列的复制语句:INSERT INTO crm_add (id,address,pid) SELECT id,NAME,parentId FROM labos_area;
--判断数据库是否存在 IF EXISTS (SELECT * FROM MASTER.sys.sysdatabases WHERE NAME = '库名') PRINT 'exists ' else PRINT 'not exists' -- 判断要创建的表名是否存在 IF EXISTS (Select * From sysObjects Where Name ='表名' And Type In ('S','U')) PRINT 'exists' ELSE PRINT 'not exists'