SQL²éѯÊý¾Ý¿âÖÐÿÕűíµÄ¼Ç¼Êý
±¾ÎÄÀ´×Ô£ºhttp://hi.baidu.com/darkroot/blog/item/7b74be2cf06d76e78b139903.html
declare @tbName nvarchar(500)
declare @ct int
declare @csql nvarchar(500)
declare #tb cursor for SELECT OBJECT_NAME (id) As TableName from sysobjects WHERE xtype = 'U' AND OBJECTPROPERTY (id, 'IsMSShipped') = 0
open #tb
fetch next from #tb into @tbName
while @@fetch_status=0
begin
set @csql = N'Select @ct= Count(*) from ' + @tbName
Exec dbo.sp_executesql @csql,N'@ct int output',@ct output
Print @tbName + '---' + Cast(@ct As nvarchar(500))
fetch next from #tb into @tbName
end
close #tb
deallocate #tb
Ïà¹ØÎĵµ£º
Èç: ±í:consume_record
×Ö¶Î:consume (moneyÀàÐÍ) date (datetimeÀàÐÍ)
ÇëÎÊÔõôдËÄÌõsqlÓï¾ä·Ö±ð°´ÈÕ,°´ÖÜ,°´ÔÂ,°´¼¾Í³¼ÆÏû·Ñ×ÜÁ¿.
Èç:1ÔÂ 1200Ôª
2ÔÂ 3400Ôª
3ÔÂ 2800Ôª
--°´ÈÕ
select sum(consume),day([date]) from& ......
sql replace Ìæ»»×Ö¶ÎÖв¿·ÝÖ¸¶¨ÄÚÈÝ
´´½¨Êý¾Ý¿â½Ì³Ì
create database cnnet;
´´½¨Êý¾Ý±í
CREATE TABLE `cnnet`.`test` (
`id` INT( 4 ) NOT NULL AUTO_INCREMENT ,
`url` VARCHAR( 50 ) NULL ,
PRIMARY KEY ( `id` )
) ENGINE = MYISAM
²å¼¸ÌõÊý¾Ý:
INSERT INTO `test` (`id`, `url`) VALUES
(1, 'www.1aa.cm' ......
1£©²»Öª´ó¼ÒÊÇ·ñϲ»¶Ê¹ÓÑNOT IN’ÕâÑùµÄ²Ù×÷£¬Èç¹ûÊÇ£¬ÄǾ¡Á¿Ê¹ÓÃ(NOT) EXISTS Ìæ´ú
2£©ÔÚº£Á¿²éѯʱ¾¡Á¿ÉÙÓøñʽת»»¡£
3£©²éѯº£Á¿Êý¾ÝÊÇ£¬¿ÉÒÔʹÓÃoptimizer['ɔptimaizə] hints£¬ÀýÈç/*+ORDERED */
¾¡Á¿ÉÙÓÃIN²Ù×÷·û£¬»ù±¾ÉÏËùÓеÄIN²Ù×÷·û¶¼¿ÉÒÔÓÃEXISTS´úÌæ¡£
²»ÓÃNOT IN²Ù×÷·û£¬¿ÉÒÔ ......
1.Çó1..10żÊýÖ®ºÍ
select sum(level) from dual
where mod(level,2)=0
connect by level
2.½«update¸Ä»»³ÉÓÃrowidÀ´ÊµÏÖ¡£
£¨1£©ÐµÄд·¨£º
merge into SNAPSHOT120_2010_572 t1
using (select a.rowid rid, b.vip_level, b.manager_name
from xyf_vip_info_new b, snapsho ......
µ±Ê¹ÓÃMicrosoft SQL Server 2008 Management Studioʱ£¬ÓÐʱÔÚ±íÉè¼ÆÆ÷ÖжԱíËù×öµÄ¸ü¸ÄÎÞ·¨±£´æ£¬¾ßÌå±íÏÖΪ£ºµã»÷±£´æ°´Å¥ºóµ¯³ö±£´æ¶Ô»°¿òÌáʾ£º²»ÔÊÐí±£´æÐÞ¸Ä(Saving changes is not permitted)£¬µ¯³öµÄ¶Ô»°¿òÖ»ÓÐ2¸ö°´Å¥¿ÉÒÔµã»÷£¬Ò»¸öCancelÒ»¸öSave Text File£¬Ç°Ò»¸ö¾Í²»ÓÃ˵ÁË£¬ºóÒ»¸ö±£´æµÄÎļþ¸ù±¾Ã»ÒâÒ壨¿ÉÒ ......