SQL Server ÖйØÓÚEXCEPTºÍINTERSECTµÄÓ÷¨
ÊìÁ·Ê¹ÓÃSQL ServerÖеĸ÷ÖÖÓ÷¨»á¸ø²éѯ´øÀ´ºÜ¶à·½±ã¡£½ñÌì¾Í½éÉÜÒ»ÏÂEXCEPTºÍINTERSECT¡£×¢Òâ´ËÓï·¨½öÔÚSQL Server 2005¼°ÒÔÉϰ汾֧³Ö¡£
EXCEPTÊÇÖ¸ÔÚµÚÒ»¸ö¼¯ºÏÖдæÔÚ£¬µ«ÊDz»´æÔÚÓÚµÚ¶þ¸ö¼¯ºÏÖеÄÊý¾Ý¡£
INTERSECTÊÇÖ¸ÔÚÁ½¸ö¼¯ºÏÖж¼´æÔÚµÄÊý¾Ý¡£
²âÊÔÈçÏ£º
create table t1(id int,mark char(2))
go
create table t2(id int,mark char(2))
go
insert into t1
select 1,'t1' union all
select 2,'t2' union all
select 3,'t3' union all
select 4,'t4'
go
insert into t2
select 2,'t2' union all
select 3,'m3' union all
select 5,'m5' union all
select 6,'t6'
go
select * from t1
EXCEPT
select * from t2
go
select * from t1
INTERSECT
select * from t2
go
--EXCEPT½á¹û¼¯Îª
--1 t1
--3 t3
--4 t4
--INTERSECT½á¹û¼¯Îª
--2 t2
EXCEPTºÍINTERSECTµÄÓÅÏȼ¶£º
ΪÁ˲âÊÔËüÃÇÖ®¼äµÄÓÅÏȼ¶£¬ÔËÐÐÏÂÃæµÄ²âÊÔ´úÂë:
create table t3(int id,mark char(2))
go
insert into t3
select 3,'t3' union all
select 3,'r3' union all
select 5,'m5' union all
select 5,'r5' union all
select 7,'b7' union all
select 8,'b8'
go
select * from t1
EXCEPT
select * from t2
INTERSECT
select * from t3
--ÔËÐнá¹û
--1 t1
--2 t2
--3 t3
--4 t4
Ϊʲô»á³öÏÖÈçÉϽá¹ûÄØ£¬Çë¿´ÏÂÃæµÄÖ´Ðмƻ®£º
ÔÀ´t2ºÍt3ÏȽøÐеÄINTERSECTÔËË㣬µÃ³ö5 m5½á¹û¼¯£¬ÔÙºÍt1½øÐÐEXCEPTÔËËã¡£
ÈçÐè×ªÔØ£¬Çë×¢Ã÷±¾ÎÄÔ´´×ÔCSDN TJVictorרÀ¸£ºhttp://blog.csdn.net/tjvictor
Ïà¹ØÎĵµ£º
sql2005ÖÐÒ»¸öxml¾ÛºÏµÄÀý×Ó ÊÕ²Ø
¸ÃÎÊÌâÀ´×ÔÂÛ̳ÌáÎÊ£¬ÑÝʾSQL´úÂëÈçÏÂ
--½¨Á¢²âÊÔ»·¾³
set nocount on
create table test(ID varchar(20),NAME varchar(20))
insert into test select '1','aaa'
insert into test select '1','bbb'
insert into test select '1','ccc'
insert into test select '2','ddd'
inser ......
SQLÓë¹ý³Ì»¯³ÌÐòÉè¼ÆÓïÑÔ
SQLÊÇÒ»ÖÖµäÐ͵ķǹý³Ì»¯³ÌÐòÉè¼ÆÓïÑÔ£¬ÕâÖÖÓïÑÔµÄÌØµãÊÇ£º
Ö»Ö¸¶¨ÄÄЩÊý¾Ý±»²Ù×Ý£¬ÖÁÓÚ¶ÔÕâЩÊý¾ÝÒªÖ´ÐÐÄÄЩ²Ù×÷£¬ÒÔ¼°Õâ
Щ²Ù×÷ÊÇÈçºÎ
Ö´ÐÐµÄ ......
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 ......
SQL ServerµÄÐÔÄÜÖ÷Ҫȡ¾öÓÚ´ÅÅÌI/OЧÂÊ£¬Ìá¸ßI/OЧÂÊijÖÖ³ÌÐòÉϾÍÒâζ×ÅÌá¸ßÐÔÄÜ¡£SQL Server 2008ÌṩÁËÊý¾ÝѹËõ¹¦ÄÜÀ´Ìá¸ß´ÅÅÌI/O¡£
Êý¾ÝѹËõÒâζ׿õСÊý¾ÝµÄÓдÅÅÌÕ¼ÓÃÁ¿£¬ËùÒÔÊý¾ÝѹËõ¿ÉÒÔÓÃÔÚ±í£¬¾Û¼¯Ë÷Òý£¬·Ç¾Û¼¯Ë÷Òý£¬ÊÓͼË÷Òý»òÊÇ·ÖÇø±í£¬·ÖÇøË÷ÒýÉÏ¡£
Êý¾ÝѹËõ¿ÉÒÔÔÚÁ½¸ö¼¶±ðÉÏʵÏÖ£ºÐм¶±ðºÍÒ³¼¶±ð¡£Ò³¼¶±ðѹ ......