Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

oracle±È½Ï¿ìµÄ·ÖÒ³sql

 ·½°¸1 ÊÊÓÃÓÚoracle9iÒÔÉÏ£¡
select * from
(select row_number() over(order by sendid desc) rn,m.* from xxt_msgreceive m )
where rn <1010 and rn>=1000
·½°¸2
SELECT * from (SELECT A.*, ROWNUM RN from (SELECT * from xxt_msg where sendstatus=1  order by msgid desc) A WHERE ROWNUM <= 4010)WHERE RN >=4000;
¾­²âÊÔ£¬·½°¸2ËÙ¶ÈÒª¿ì


Ïà¹ØÎĵµ£º

SQL ÓÐÌõ¼þµØÉ¸Ñ¡Öظ´Êý¾Ý

 --»ù´¡Á˽⣺
1) select distinct name from table --´ò¿ªÖظ´¼Ç¼µÄµ¥¸ö×Ö¶Î
2) select * from table where fid in(Select min(fid) from table group by name)--´ò¿ªÖظ´¼Ç¼µÄËùÓÐ×Ö¶ÎÖµ
3) select * from table where name in(select name from table group by name having count(name)=1)--´ò¿ªÖظ´ÈÎÒâ´ÎÊýµ ......

DBA³£ÓÃsql(Ò»)

--¼à¿ØË÷ÒýÊÇ·ñʹÓà alter index &index_name monitoring usage; alter index &index_name nomonitoring usage; select * from v$object_usage where index_name = &index_name;
--ÇóÊý¾ÝÎļþµÄI/O·Ö²¼ select df.name,phyrds,phywrts,phyblkrd,phyblkwrt,singleblkrds,readtim,writetim from v$filestat fs,v ......

¹ÜÀí SQL Server µÄÊÂÎñÈÕÖ¾

ÎÄÕÂÀ´Ô´£ºHttp://www.simple-talk.com
Ô­ÎĵØÖ·£ºhttp://www.simple-talk.com/sql/learn-sql-server/managing-transaction-logs-in-sql-server/
Ô­×÷ÕߣºRobert Sheldon
·­Ò룺Èý½úÒ»Ö¦»¨
ÒëÎÄÔ­µØÖ·£ºhttp://prj.souty.cn/Admin/Knowledges/ShowKnowledge.aspx?id=44dbde74-d2c5-41a5-a8e9-375ba7103025
ÔÚ SQL Serv ......

SQL£ºÈçºÎ°Ñ¶àÐвéѯ½á¹û£¬×÷ΪһÐзµ»Ø

CREATE    FUNCTION dbo.UF_GetInvoiceSerials( @bizCode VARCHAR(10))
   RETURNS VARCHAR(100)
AS
BEGIN
   DECLARE @ret AS VARCHAR(1000)
   SELECT @ret=Coalesce(@ret + ', ','') +
         CASE e.ID
     ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ