SQL Server/T-SQL Tutorial/Transact SQL/Continue

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Версия от 10:22, 26 мая 2010; Admin (обсуждение | вклад) (1 версия)
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Continue a loop

3> CREATE TABLE Product(
4>     ProductID               int                NOT NULL,
5>     Name                    nvarchar(25)       NOT NULL,
6>     ProductNumber           nvarchar(25)               ,
7>     Color                   nvarchar(15)       NULL,
8>      StandardCost            money              NOT NULL,
9>      Size                    nvarchar(5)        NULL,
10>      Weight                  decimal(8, 2)      NULL,
11>      ProductLine             nchar(20)           NULL,
12>      SellStartDate           datetime           NOT NULL,
13>      SellEndDate             datetime           NULL
14>  )
15>  GO
1> insert into Product values(1,"Product A", "1","Red",123.123,"1",1,"ProductLine A","1999-03-22","2000-03-22");
2> GO
(1 rows affected)
1>
2>
3> insert into Product values(2,"Product B", "2","Yellow",234.234,"1",3,"ProductLine B","2000-03-22","2001-03-22");
4> GO
(1 rows affected)
1>
2>
3> insert into Product values(3,"Product C", "3","Pink",345.345,"1",3,"ProductLine V","2001-09-22","2006-02-22");
4> GO
(1 rows affected)
1>
2>
3> insert into Product values(4,"Product D", "4","White",456.456,"1",4,"ProductLine D","2002-08-22","2006-03-22");
4> GO
(1 rows affected)
1>
2>
3> insert into Product values(5,"Product E", "5","Black",567.567,"1",5,"ProductLine E","2003-01-22","2003-04-22");
4> GO
(1 rows affected)
1>
2>
3> insert into Product values(6,"Product F", "6","Blue",678.678,"1",6,"ProductLine W","2004-02-22","2005-05-22");
4> GO
(1 rows affected)
1>
2>
3> insert into Product values(7,"Product G", "7","Drak",789.789,"1",7,"ProductLine Q","2005-03-22","2006-03-22");
4> GO
(1 rows affected)
1>
2>
3> insert into Product values(8,"Product H", "8","Gray",234.123,"1",8,"ProductLine F","2006-04-22","2006-09-22");
4> GO
(1 rows affected)
1>
2>
3> insert into Product values(9,"Product I", "9","Red",543.123,"1",9,"ProductLine R","2007-05-22","2008-03-22");
4> GO
(1 rows affected)
1>
2>
3> insert into Product values(0,"Product J", "0","Gold",765.123,"1",0,"ProductLine J","2008-06-22","2009-03-22");
4> GO
(1 rows affected)
1>
2>
3>
4>
5> WHILE (SELECT AVG(StandardCost) FROM Product) < $1200
6> BEGIN
7>   UPDATE Product SET StandardCost = StandardCost * 1.25
8>   SELECT MAX(StandardCost) FROM Product
9>   IF (SELECT MAX(StandardCost) FROM Product) > $4000
10>     
11>     BREAK
12>    ELSE
13>      
14>      CONTINUE
15>  END
16>  PRINT "Done."
17>  GO
(10 rows affected)
---------------------
             987.2363
(10 rows affected)
---------------------
            1234.0454
(10 rows affected)
---------------------
            1542.5568
(10 rows affected)
---------------------
            1928.1960
(10 rows affected)
---------------------
            2410.2450
(1 rows affected)
Done.
1>
2>
3> drop table Product;
4> GO
1>
2>