SQL »ñÈ¡ÁÐÃû ÀûÓÃϵͳ±í
SELECT sysobjects.name,syscolumns.name
from sysobjects,syscolumns
WHERE(sysobjects.id=syscolumns.id)
select col_name(OBJECT_ID(£§staff£§),17)
select name
from syscolumns
where id=object_id(£§ÄãµÄ±íÃû£§);
Ïà¹ØÎĵµ£º
ÔªÊý¾Ý¼ò½é
¡¡¡¡ÔªÊý¾Ý (metadata) ×î³£¼ûµÄ¶¨ÒåΪ"ÓйØÊý¾ÝµÄ½á¹¹Êý¾Ý"£¬»òÕßÔÙ¼òµ¥Ò»µã¾ÍÊÇ"¹ØÓÚÊý¾ÝµÄÐÅÏ¢"£¬ÈÕ³£Éú»îÖеÄͼÀý¡¢Í¼Êé¹ÝĿ¼¿¨ºÍÃûƬµÈ¶¼¿ÉÒÔ¿´×÷ÊÇÔªÊý¾Ý¡£ÔÚ¹ØÏµÐÍÊý¾Ý¿â¹ÜÀíϵͳ (DBMS) ÖУ¬ÔªÊý¾ÝÃèÊöÁËÊý¾ÝµÄ½á¹¹ºÍÒâÒå¡£±ÈÈçÔÚ¹ÜÀí¡¢Î¬»¤ SQL Server »òÕßÊÇ¿ª·¢Êý¾Ý¿âÓ¦ÓóÌÐòµÄʱºò£¬ÎÒÃǾ³£Òª»ñ ......
create table aaa
(
id int primary key ,
name varchar(30) not null
)
create table bbb
(
id int primary key ,
name varchar(30) not null
)
--½»
select * from aaa
where exists
(
select * from bbb where aaa.id=bbb.id and aaa.name = bbb.name
)
--²î
select *
from bbb
where not exists
(
......
Àí½âSQL SERVERÖÐËùÓÐÕߺͼܹ¹µÄÇø±ð
SQL SERVER2005½éÉÜÁ˼ܹ¹£¬¼Ü¹¹Ïà¶ÔÓÚÒÔǰ°æ±¾ÖеĶÔÏóËùÓÐÕß¡£±¾ÎĽ«½âÊÍÕâÁ½ÕßµÄÇø±ð£¬²¢Ï£ÍûÄܽ⿪ÄãÖÁ½ñÈԶԼܹ¹Ò»µãÀ§»ó¡£
¶ÔÏóËùÓÐÕß
ÒªÀí½âËùÓÐÕߺͼܹ¹Ö®¼äµÄÇø±ð£¬ÈÃÎÒÃÇÏÈ»¨µãʱ¼äÀ´¸´Ï°Ò»Ï¶ÔÏóµÄËùÓÐȨ¡£ÔÚSQL SERVER2000»òÒÔǰ°æ±¾Öд´½¨Ò»¸ö¶ÔÏ󣬶ÔÏó±ØÐëÒªÓÐÒ»¸öËù ......
ÔÎĵØÖ·£ºhttp://www.dingos.cn/index.php?topic=1688.0
OracleÓÐrownumÓÃÓÚ·ÃÎʱíÖÐÐкš£ÄÇôÔÚSQL ServerÖÐÊÇ·ñÓеÈЧµÄÄØ£¿»òÕßÔÚSQL ServerÖÐÈçºÎÊä³öÐкţ¿
-----------------------------------
ÔÚSQL ServerÖÐûÓÐÖ±½ÓµÈЧÓÚOracleµÄrownum
-----------------------------------
Ñϸñ˵À´£¬ÔÚ¹ØÏµÊý¾Ý¿âÖУ ......
ÉϽÚÎÒÃǽéÉÜÁ˱íÁ¬½Ó£¬¸üÈ·ÇеÄ˵ÊÇinner joins內Á¬½Ó£®
¡¡¡¡內Á¬½Ó½öÑ¡³öÁ½ÕűíÖл¥ÏàÆ¥ÅäµÄ¼Ç¼£®Òò´Ë£¬Õâ»áµ¼ÖÂÓÐʱÎÒÃÇÐèÒªµÄ¼Ç¼ûÓаüº¬½øÀ´¡£
¡¡¡¡Îª¸üºÃµÄÀí½âÕâ¸ö¸ÅÄÎÒÃǽéÉÜÁ½¸ö±í×÷ÑÝʾ¡£ËÕ¸ñÀ¼Òé»áÖеÄÕþµ³±í(party)ºÍÒéÔ±±í(msp)¡£
party(Code,Name,Leader)
Code: Õþµ³´úÂë
Name: Õþµ³ ......