sql 2005 ²»Í¬Êý¾Ý¿âµÄÊý¾Ý±í¸´ÖÆ
sql 2005±íµÄ¸´ÖÆÓÐÁ½ÖÖ£ºÒ»ÖÖ¾ÍÊǰÑÕû¸ö±í¸´ÖƹýÈ¥£¬¾ÍºÃÏñ¸´ÖÆÎļþ²¢ÇÒÖØÃüÃû¡£±ðÍâÒ»ÖÖ¾ÍÊǰѱíµÄÄÚÈݸ´Öƹý³ö.
select * into newtable form oldtable;°Ñoldtabel¸´ÖƵ½newtableÇÒnewtable²»´æÔÚ,·ñÔò³ö´í.;
insert into newtable select * from oldtable°ÑoldtableµÄÄÚÈݲåÈëµ½newtable, newtableÒ»¶¨Òª´æÔÚ,²Å¿ÉÒÔ¸´ÖÆ.
Ïà¹ØÎĵµ£º
×·¼Ó£ºrow_number, rank, dese_rank, ntile
1. row_number: Ϊ²éѯ³öÀ´µÄÿһÐмǼÉú³ÉÒ»¸öÐòºÅ¡£
SELECT row_number() OVER(ORDER BY field) AS row_n
from tablename;
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with t_towtable
as (select row_number over(order by field1) as row_number from tb)
select * from t_rowtable where row_numbe ......
alert index mem_ct monitoring usage;
desc v$object_usage;
set linesize 190
select * from v$object_usage;
SQL>SET AUTOTRACE ON;
¡¡¡¡*autotrace¹¦ÄÜÖ»ÄÜÔÚSQL*PLUSÀïʹÓÃ
¡¡¡¡ÆäËûһЩʹÓ÷½·¨£º
¡¡¡¡2.2.1¡¢ÔÚSQLPLUSÖеõ½Óï¾ä×ܵÄÖ´ÐÐʱ¼ä
¡¡¡¡SQL> set timing on;
2.2.2¡¢Ö»ÏÔʾִÐмƻ®--(»áÍ¬Ê ......
if not object_id('Tempdb..#T') is null
drop table #T
Go
Create table #T([ID] int,[Name] nvarchar(1),[Memo] nvarchar(2))
Insert #T
select 1,N'A',N'A1' union all
select 2,N'A',N'A2' union all
select 3,N'A',N'A3' union all
select 4,N'B',N'B1' union all
select 5,N'B',N'B2'
G ......
--ºÏ²¢ÐУ¬²¢·µ»ØºÏ²¢µÄÖµ
Create proc [dbo].[proUniteRow]
@tab varchar(30), --±íÃû
@col varchar(30), --ºÏ²¢µÄÁÐÃû
@where varchar(2000), &nbs ......
ÓÐʱÎÒÃÇ»áÏñÏÂÃæµÄÇé¿öÒ»Ñù£¬ÎªÖ÷±íµÄıһÌõ¼Ç¼£¬ÔÚÖмä±í(T_Stud_Course ±í)ÖÐͬʱ²åÈë¶àÌõÊý¾Ý
T_Student ±í
Stud_ID
Name
1
Tom
2
Jack
T_Course ±í
Course_ID
Course
1
Chinese
2
English
T_Stud_Course ±í
ID
Stud_ID
Course_ID
1
1
1
2
1
2
3
2
2
ÏÖÔÚÎÒÃÇ¿ÉÒÔÏÂÃæµÄ´æ´¢¹ý³ÌÀ ......