ÈçºÎÕÒµ½sql serverÊý¾Ý¿âÖеÄËÀËø?
¼ì²âËÀËø
Èç¹û·¢ÉúËÀËøÁË£¬ÎÒÃÇÔõôȥ¼ì²â¾ßÌå·¢ÉúËÀËøµÄÊÇÄÄÌõSQLÓï¾ä»ò´æ´¢¹ý³Ì£¿
ÕâʱÎÒÃÇ¿ÉÒÔʹÓÃÒÔÏ´洢¹ý³ÌÀ´¼ì²â£¬¾Í¿ÉÒÔ²é³öÒýÆðËÀËøµÄ½ø³ÌºÍSQLÓï¾ä¡£SQL Server×Ô´øµÄϵͳ´æ´¢¹ý³Ìsp_whoºÍsp_lockÒ²¿ÉÒÔÓÃÀ´²éÕÒ×èÈûºÍËÀËø, µ«Ã»ÓÐÕâÀï½éÉܵķ½·¨ºÃÓá£
use master
go
create procedure sp_who_lock
as
begin
declare @spid int,@bl int,
@intTransactionCountOnEntry int,
@intRowcount int,
@intCountProperties int,
@intCounter int
create table #tmp_lock_who (
id int identity(1,1),
spid smallint,
bl smallint)
IF @@ERROR<>0 RETURN @@ERROR
insert into #tmp_lock_who(spid,bl) select 0 ,blocked
from (select * from sysprocesses where blocked>0 ) a
where not exists(select * from (select * from sysprocesses where blocked>0 ) b
where a.blocked=spid)
union select spid,blocked from sysprocesses where blocked>0
IF @@ERROR<>0 RETURN @@ERROR
-- ÕÒµ½ÁÙʱ±íµÄ¼Ç¼Êý
select @intCountProperties = Count(*),@intCounter = 1
from #tmp_lock_who
IF @@ERROR<>0 RETURN @@ERROR
if @intCountProperties=0
select 'ÏÖÔÚûÓÐ×èÈûºÍËÀËøÐÅÏ¢' as message
-- Ñ»·¿ªÊ¼
while @intCounter <= @intCountProperties
begin
-- È¡µÚÒ»Ìõ¼Ç¼
select&nbs
Ïà¹ØÎĵµ£º
ÕªÒª£º±¾ÎĽéÉÜÁËSQL Server´æ´¢¹ý³ÌÏà¶ÔÓÚÆäËûµÄÊý¾Ý¿â·ÃÎÊ·½·¨µÄÓŵ㼰SQL Server´æ´¢¹ý³ÌµÄ·ÖÀàµÈ¡£
SQL Server´æ´¢¹ý³ÌÊÇÒ»¸ö±»ÃüÃûµÄ´æ´¢ÔÚ·þÎñÆ÷ÉϵÄTransacation-SqlÓï¾ä¼¯ºÏ,ÊÇ·â×°ÖØ¸´ÐÔ¹¤×÷µÄÒ»ÖÖ·½·¨,ËüÖ§³ÖÓû§ÉùÃ÷µÄ±äÁ¿¡¢Ìõ¼þÖ´ÐÐºÍÆäËûÇ¿´óµÄ±à³Ì¹¦ÄÜ¡£
SQL Server´æ´¢¹ý³ÌÏà¶ÔÓÚÆäËûµÄÊý¾Ý¿â·ÃÎÊ·½·¨Ó ......
ǰÌá,MS SQLµÄͨÅä·ûº¬Ò壺
ÐòºÅ
ͨÅä·û
º¬Òå
ʾÀý
1
%
°üº¬Áã¸ö»ò¶à¸ö×Ö·ûµÄÈÎÒâ×Ö·û´®¡£
WHERE title LIKE '%computer%' ½«²éÕÒÔÚÊéÃûÖÐÈÎÒâλÖðüº¬µ¥´Ê"computer" µÄËùÓÐÊéÃû¡£
2
_
Èκε¥¸ö×Ö·û¡£
WHERE au_fname LIKE '_ean' ½«²éÕÒÒÔ ean ½áβµÄËùÓÐ 4 ¸ö×ÖĸµÄÃû×Ö£¨Dean¡¢Sean µÈ£©¡£
3
[ ] ......
ÊÇÓÃÓÚ·ÃÎʺʹ¦ÀíÊý¾Ý¿âµÄ±ê×¼µÄ¼ÆËã»úÓïÑÔ¡£
ͨ¹ý SQL À´¹ÜÀíÊý¾Ý
½á¹¹»¯²éѯÓïÑÔ (SQL) ÊÇÓÃÓÚ·ÃÎÊÊý¾Ý¿âµÄ±ê×¼ÓïÑÔ£¬ÕâЩÊý¾Ý¿â°üÀ¨ SQL Server¡¢Oracle¡¢MySQL¡¢Sybase ÒÔ¼° Access µÈµÈ¡£
¶ÔÓÚÄÇЩϣÍûÔÚÊý¾Ý¿âÖд洢Êý¾Ý²¢´ÓÖлñÈ¡Êý¾ÝµÄÈËÀ´Ëµ£¬SQL µÄ֪ʶÊǼÛÖµÎÞ·¨ºâÁ¿µÄ¡£
ʲôÊÇ SQL?
SQL Ö¸½á¹¹»¯²éѯÓïÑÔ ......
ÆÕͨÐÐÁÐת»»
ÎÊÌ⣺¼ÙÉèÓÐÕÅѧÉú³É¼¨±í(tb)ÈçÏÂ:
ÐÕÃû ¿Î³Ì ·ÖÊý
ÕÅÈý ÓïÎÄ 74
ÕÅÈý Êýѧ 83
ÕÅÈý ÎïÀí 93
ÀîËÄ ÓïÎÄ 74
ÀîËÄ Êýѧ 84
ÀîËÄ ÎïÀí 94
Ïë±ä³É(µÃµ½ÈçϽá¹û)£º
ÐÕÃû ÓïÎÄ Êýѧ ÎïÀí
---- ---- ---- ----
ÀîËÄ 74 84 94
ÕÅÈý 74 83 93
-------------------
*/
create table tb(ÐÕÃû varc ......