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SQL code:
--ÓÃÒ»¾äSQLÈ¡³öµÚ m Ìõµ½µÚ n Ìõ¼Ç¼µÄ·½·¨
1 --´ÓTable ±íÖÐÈ¡³öµÚ m Ìõµ½µÚ n ÌõµÄ¼Ç¼£º(Not In °æ±¾)
select * from Item
select top n-m+1 * from TABLE where (id NOT IN (select top m-1 id from TABLE ))
2--´ÓTABLE±íÖÐÈ¡³öµÚmµ½nÌõ¼Ç¼ (Exists°æ±¾)
SELECT TOP n-m+1 * from TABLE AS a WHERE Not Exists
(Select * from (Select Top m-1 * from TABLE order by id) b Where b.id=a.id )
Order by id
3--mΪÉϱ꣬nΪϱê,ÀýÈçÈ¡³öµÚ8µ½12Ìõ¼Ç¼,m=8,n=12,TableΪ±íÃû
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Select Top n-m+1 * from Table Where Id>(Select Max(Id) from
(Select Top m-1 Id from Table Order By Id Asc) Temp) Order By Id Asc
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SQL code:
sql serverµÄËæ»úº¯ÊýnewID()ºÍRAND()¡¡¡¡
SELECT * from Northwind..Orders ORDER BY NEWID()
--Ëæ»úÅÅÐò
SELECT TOP 10 * from Northwind..Orders ORDER BY NEWID()
--´ÓOrders±íÖÐËæ»úÈ¡³ö10Ìõ¼Ç¼¡¡¡¡
MsSqlËæ»úÈ¡Êý¾Ý select top 10 * from c_cy_admin order by newid()
Access Ëæ»úÈ¡Êý¾Ý select SELECT top 10 id from ±í1 order by rand(id)
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