这条语句适用于a表比b表大的情况select * from ecs_goods a where cat_id in(select cat_id from ecs_category);这条语句适用于b表比a表大的情况select * from ecs_goods a where EXISTS(sele...
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数据库 时间:
2015-11-17 23:20:35
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212
Summit导出命令Summit_export –ENT EXTSYSTEM –SQL “where ExtSystem in (’……’,’……’)” –XML –O ……导出application:–ENT APP导出mapping: –ENT MAP_DEFSummit导入命令Trade_im...
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其他好文 时间:
2015-11-17 20:42:32
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274
use DangJianSELECT vale1, value2 into Table2 from Table1select COUNT(*) from tmpdangyuan where 手机号 in (select phone from T_YEWU_User)select COUNT(1) f...
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其他好文 时间:
2015-11-17 18:56:22
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135
CREATE PROCEDURE sp_GetInfo(in _where varchar(2000),in _orderby varcahr(200),in _pageindex int,in _pagesize int,out _totalcount)BEGIN SET @startrow =....
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数据库 时间:
2015-11-17 16:37:40
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129
update a00 ,(select a,b as bb from a00) as T2 set a00.d =CONCAT("{themeCode:",'"',T2.bb,'"',"}") where a00.a =T2.a
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数据库 时间:
2015-11-17 12:55:38
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146
Add Two NumbersYou have two numbers represented by a linked list, where each node contains a single digit. The digits are stored inreverseorder, such ...
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其他好文 时间:
2015-11-17 12:52:20
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180
DISTINCT 语法1 SELECT DISTINCT NAME FROM TABLENAME删除去重SQL语法DELETE FROM QuestionLib where ID in ( select min(ID) ID FROM QuestionLib group by NAME having...
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其他好文 时间:
2015-11-17 12:31:52
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109
using System;using System.Collections.Generic;public class MyClass{ static void DoStuff(T t,S s) where T:MyClass { Console.WriteLine("T:{0}",t); Con.....
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其他好文 时间:
2015-11-17 12:30:51
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113
1=1 永真, 11 永假。 11 的用处: 用于只取结构不取数据的场合 例如: create table table_temp tablespace tbs_temp as select * from table_ori where 11 建成一个与table_ori 结构相同的表table_te...
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数据库 时间:
2015-11-17 12:21:11
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146
获取表字段: select *? from user_tab_columns? where Table_Name=‘用户表‘? order by column_name 获取表注释: select *? from user_tab_comments? where Table_Name=‘用户表‘ order by Table_Name 获取字...
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数据库 时间:
2015-11-17 11:12:09
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195