浅谈游标选项 Static|Keyset|DYNAMIC|FAST_FORWARD

IF OBJECT_ID(‘T1‘) IS NOT NULL
    DROP TABLE T1
GO
CREATE TABLE T1
(
    ID INT  PRIMARY KEY,
    seq INT
)

DECLARE @seq INT=0
WHILE @seq < 50
BEGIN
    INSERT INTO dbo.T1
            (  ID,seq )
    VALUES  ( @seq+1,@seq)
    SET @seq=@seq+1
END

 1 DECLARE @seq INT,@ID INT=1
 2 
 3 
 4 DECLARE CUR_Static CURSOR STATIC|DYNAMIC|KEYSET|FAST_FORWARD
 5     FOR SELECT  ID,seq FROM T1 ORDER BY ID
 6 
 7 OPEN CUR_Static 
 8 FETCH NEXT FROM CUR_Static INTO @ID,@seq
 9 WHILE @@FETCH_STATUS = 0
10 BEGIN    
12     PRINT @seq
13     FETCH NEXT FROM CUR_Static INTO @ID,@seq    
14 END
15 CLOSE CUR_Static
16 DEALLOCATE CUR_Static