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SQL Server / T-SQL Tutorial » Transact SQL » while 
20. 8. 5. While with counter
8CREATE TABLE Product(
9>     ProductID               int                NOT NULL,
10>     Name                    nvarchar(25)       NOT NULL,
11>      ProductNumber           nvarchar(25)               ,
12>      Color                   nvarchar(15)       NULL,
13>      StandardCost            money              NOT NULL,
14>      Size                    nvarchar(5)        NULL,
15>      Weight                  decimal(82)      NULL,
16>      ProductLine             nchar(20)           NULL,
17>      SellStartDate           datetime           NOT NULL,
18>      SellEndDate             datetime           NULL
19>  )
20>  GO
1insert into Product values(1,'Product A', '1','Red',123.123,'1',1,'ProductLine A','1999-03-22','2000-03-22');
2> GO

(rows affected)
1>
2>
3insert into Product values(2,'Product B', '2','Yellow',234.234,'1',3,'ProductLine B','2000-03-22','2001-03-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(3,'Product C', '3','Pink',345.345,'1',3,'ProductLine V','2001-09-22','2006-02-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(4,'Product D', '4','White',456.456,'1',4,'ProductLine D','2002-08-22','2006-03-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(5,'Product E', '5','Black',567.567,'1',5,'ProductLine E','2003-01-22','2003-04-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(6,'Product F', '6','Blue',678.678,'1',6,'ProductLine W','2004-02-22','2005-05-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(7,'Product G', '7','Drak',789.789,'1',7,'ProductLine Q','2005-03-22','2006-03-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(8,'Product H', '8','Gray',234.123,'1',8,'ProductLine F','2006-04-22','2006-09-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(9,'Product I', '9','Red',543.123,'1',9,'ProductLine R','2007-05-22','2008-03-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(0,'Product J', '0','Gold',765.123,'1',0,'ProductLine J','2008-06-22','2009-03-22');
4> GO

(rows affected)
1>
2>
3>
4>
5>
6>
7> DECLARE @Counter Int
8> SET @Counter = 1
9> WHILE @Counter < 4
10>  BEGIN
11>   PRINT 'SubCategory '
12>   SELECT Name, ProductID
13>   FROM Product
14>   WHERE ProductID = @Counter
15>    SET @Counter = @Counter + 1
16>  END
17>  GO
SubCategory
Name                      ProductID
------------------------- -----------
Product A                           1

(rows affected)
SubCategory
Name                      ProductID
------------------------- -----------
Product B                           2

(rows affected)
SubCategory
Name                      ProductID
------------------------- -----------
Product C                           3

(rows affected)
1>
2>
3> drop table Product;
4> GO
20. 8. while
20. 8. 1. How to perform repetitive processing
20. 8. 2. WHILE @@FETCH_STATUS = 0
20. 8. 3. This procedure inserts rows by using while loop
20. 8. 4. Insert 100 rows of data: RAND
20. 8. 5. While with counter
20. 8. 6. Use while loop to insert data
20. 8. 7. While loop controlled by an aggregate function
20. 8. 8. WHILE with AND operator
20. 8. 9. A script that tests and adjusts credit amounts with a WHILE loop
20. 8. 10. Using a Subquery with a Single-Statement WHILE Loop
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