做如下替换: 将字符串asd#sdf#sdfsf中含# …# 形式的子串删除,写出sql语句 sql语句如下: UPDATE MM SET name =substring(name,0,CHARINDEX('#',name))+reverse(substring(reverse(name),0,CHARINDEX('#',reverse(name)))) WHERE name like '%#%#%'
sql server 查找包含字符串的对象 SELECT sm.object_id, OBJECT_NAME(sm.object_id) AS object_name, o.type, o.type_desc, sm.definition FROM sys.sql_modules AS sm JOIN sys.objects AS o ON sm.object_id = o.object_id where sm.definition like '%要匹配的内容%' --collate SQL_L
python字符串replace()方法 >>> help(str.replace)Help on method_descriptor:replace(...) S.replace(old, new[, count]) -> string Return a copy of string S with all occurrences of substring old replaced by new. If the optional argument cou
转自芙蓉清秀的BLOG http://blog.sina.com.cn/liurongxiu1211 sql去除重复语句 (2012-06-15 15:00:01) sql 单表/多表查询去除重复记录 单表distinct 多表group by group by 必须放在 order by 和 limit之前,不然会报错 ************************************************************************************ 1.
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
SQL去除重复记录 if not object_id('Tempdb..#T') is null drop table #T Go Create table #T([ID] int,[Name] nvarchar(1),[Memo] nvarchar(2)) Insert #T select 1,N'A',N'A1' union all select 2,N'A',N'A2' union all select 3,N'A',N'A3' union all select 4,N'B',N'