SQL 合并行，返回带分隔字符的字符串
--合并行，并返回合并的值
Create proc [dbo].[proUniteRow]
@tab varchar(30), --表名
@col varchar(30), --合并的列名
@where varchar(2000), --合并的条件
@firstSplit varchar(100), --连接字符前缀
@lastSplit varchar(100), --连接字符后缀
@order varchar(100), --排序
@val nvarchar(2000)='' output –返回值
as
begin
declare @sql nvarchar(2000)
set @sql='
declare @retStr varchar(2000)
set @retStr=''''
declare cur cursor
read_only
for select
'+@col+' from '+@tab
if len(@where)>0
set @sql=@sql+' where '+@where
if len(@order)>0
set @sql=@sql+' order by '+@order
set @sql=@sql+'
declare @str varchar(2000)
open cur
fetch next from cur into @str
while (@@fetch_status =0)
begin
set @retStr=@retStr+'''+@firstSplit+'''+@str+'''+@lastSplit+'''
fetch next from cur into @str
end
close cur
deallocate cur
if len(@retStr)>0
set @strEnd=substring(@retStr,1,len(@retStr)-1)
'
exec sp_executesql @sql,N'@strEnd nvarchar(2000) output',@val output
end
执行：
表pro_lbsxb:
ID lbsx_value lbsx_isList lbsx_order
1 A 1 1
2 B 1 2
3 C 1 3
4 D &
相关文档：
SELECT g.rid, room_no, planed_count,cc from
(SELECT rid,room_no, planed_count from YC_HOTEL_ROOM_T ) r
left join
(SELECT rid,count(*) cc from YC_GUEST_INFO_T group by rid ) g
ON r.rid = g.rid WHERE planed_ ......
从Table 表中取出第 m 条到第 n 条的记录：(Not In 版本)
SELECT TOP n-m+1 *
from Table
WHERE (id NOT IN (SELECT TOP m-1 id from Table ))
--从TABLE表中取出第m到n条记录 (Exists版本)
SELECT TOP n-m+1 * from TABLE AS a WHERE Not Exists
(Select * from (Select Top m-1 * from TABLE orde ......
alert index mem_ct monitoring usage;
desc v$object_usage;
set linesize 190
select * from v$object_usage;
SQL>SET AUTOTRACE ON;
*autotrace功能只能在SQL*PLUS里使用
其他一些使用方法：
2.2.1、在SQLPLUS中得到语句总的执行时间
SQL> set timing on;
2.2.2、只显示执行计划--(会同� ......
1、查询两个时间之间
select * from [tablename] where date between \'value1\' and \'value2\'
2、显示最后回复时间
select a.title,a.username,b.adddate from table a,(select max(adddate) adddate from table where table.title=a.title) b
3、日程安排提前5分钟提醒
select * from 日程安排 w ......
