Use while loop to insert data : While « Transact SQL « SQL Server / T-SQL

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SQL Server / T-SQL » Transact SQL » While 
Use while loop to insert data

 


6> IF OBJECT_ID('dbo.Nums') IS NOT NULL
7>   DROP TABLE dbo.Nums;
8> GO
1> CREATE TABLE dbo.Nums(n INT NOT NULL PRIMARY KEY);
2> DECLARE @max AS INT, @rc AS INT;
3> SET @max = 1000000;
4> SET @rc = 1;
5>
6> INSERT INTO Nums VALUES(1);
7> WHILE @rc * 2 <= @max
8> BEGIN
9>   INSERT INTO dbo.Nums SELECT n + @rc FROM dbo.Nums;
10>   SET @rc = @rc * 2;
11> END
12>
13> INSERT INTO dbo.Nums
14>   SELECT n + @rc FROM dbo.Nums WHERE n + @rc <= @max;
15>
16> DECLARE @s AS DATETIME, @e AS DATETIME;
17> SET @s = '20060101';
18> SET @e = '20061231';
19>
20> SELECT @s + n - 1 AS dt
21> FROM dbo.Nums
22> WHERE n <= DATEDIFF(day, @s, @e) + 1;
23> GO

(1 rows affected)

(2 rows affected)

(4 rows affected)

(8 rows affected)

(16 rows affected)

(32 rows affected)

(64 rows affected)

(128 rows affected)

(256 rows affected)

(512 rows affected)

(1024 rows affected)

(2048 rows affected)

(4096 rows affected)

(8192 rows affected)

(16384 rows affected)

(32768 rows affected)

(65536 rows affected)

(131072 rows affected)

(262144 rows affected)

(475712 rows affected)
dt
-----------------------
2006-01-01 00:00:00.000
2006-01-02 00:00:00.000
2006-01-03 00:00:00.000
2006-01-04 00:00:00.000
2006-01-05 00:00:00.000
2006-01-06 00:00:00.000
2006-01-07 00:00:00.000
2006-01-08 00:00:00.000
2006-01-09 00:00:00.000
2006-01-10 00:00:00.000
2006-01-11 00:00:00.000
2006-01-12 00:00:00.000
2006-01-13 00:00:00.000
2006-01-14 00:00:00.000
2006-01-15 00:00:00.000
2006-01-16 00:00:00.000
2006-01-17 00:00:00.000
2006-01-18 00:00:00.000
2006-01-19 00:00:00.000
2006-01-20 00:00:00.000
2006-01-21 00:00:00.000
2006-01-22 00:00:00.000
2006-01-23 00:00:00.000
2006-01-24 00:00:00.000
2006-01-25 00:00:00.000
2006-01-26 00:00:00.000
2006-01-27 00:00:00.000
2006-01-28 00:00:00.000
2006-01-29 00:00:00.000
2006-01-30 00:00:00.000
2006-01-31 00:00:00.000
2006-02-01 00:00:00.000
2006-02-02 00:00:00.000
2006-02-03 00:00:00.000
2006-02-04 00:00:00.000
2006-02-05 00:00:00.000
2006-02-06 00:00:00.000
2006-02-07 00:00:00.000
2006-02-08 00:00:00.000
2006-02-09 00:00:00.000
2006-02-10 00:00:00.000
2006-02-11 00:00:00.000
2006-02-12 00:00:00.000
2006-02-13 00:00:00.000
2006-02-14 00:00:00.000
2006-02-15 00:00:00.000
2006-02-16 00:00:00.000
2006-02-17 00:00:00.000
2006-02-18 00:00:00.000
2006-02-19 00:00:00.000
2006-02-20 00:00:00.000
2006-02-21 00:00:00.000
2006-02-22 00:00:00.000
2006-02-23 00:00:00.000
2006-02-24 00:00:00.000
2006-02-25 00:00:00.000
2006-02-26 00:00:00.000
2006-02-27 00:00:00.000
2006-02-28 00:00:00.000
2006-03-01 00:00:00.000
2006-03-02 00:00:00.000
2006-03-03 00:00:00.000
2006-03-04 00:00:00.000
2006-03-05 00:00:00.000
2006-03-06 00:00:00.000
2006-03-07 00:00:00.000
2006-03-08 00:00:00.000
2006-03-09 00:00:00.000
2006-03-10 00:00:00.000
2006-03-11 00:00:00.000
2006-03-12 00:00:00.000
2006-03-13 00:00:00.000
2006-03-14 00:00:00.000
2006-03-15 00:00:00.000
2006-03-16 00:00:00.000
2006-03-17 00:00:00.000
2006-03-18 00:00:00.000
2006-03-19 00:00:00.000
2006-03-20 00:00:00.000
2006-03-21 00:00:00.000
2006-03-22 00:00:00.000
2006-03-23 00:00:00.000
2006-03-24 00:00:00.000
2006-03-25 00:00:00.000
2006-03-26 00:00:00.000
2006-03-27 00:00:00.000
2006-03-28 00:00:00.000
2006-03-29 00:00:00.000
2006-03-30 00:00:00.000
2006-03-31 00:00:00.000
2006-04-01 00:00:00.000
2006-04-02 00:00:00.000
2006-04-03 00:00:00.000
2006-04-04 00:00:00.000
2006-04-05 00:00:00.000
2006-04-06 00:00:00.000
2006-04-07 00:00:00.000
2006-04-08 00:00:00.000
2006-04-09 00:00:00.000
2006-04-10 00:00:00.000
2006-04-11 00:00:00.000
2006-04-12 00:00:00.000
2006-04-13 00:00:00.000
2006-04-14 00:00:00.000
2006-04-15 00:00:00.000
2006-04-16 00:00:00.000
2006-04-17 00:00:00.000
2006-04-18 00:00:00.000
2006-04-19 00:00:00.000
2006-04-20 00:00:00.000
2006-04-21 00:00:00.000
2006-04-22 00:00:00.000
2006-04-23 00:00:00.000
2006-04-24 00:00:00.000
2006-04-25 00:00:00.000
2006-04-26 00:00:00.000
2006-04-27 00:00:00.000
2006-04-28 00:00:00.000
2006-04-29 00:00:00.000
2006-04-30 00:00:00.000
2006-05-01 00:00:00.000
2006-05-02 00:00:00.000
2006-05-03 00:00:00.000
2006-05-04 00:00:00.000
2006-05-05 00:00:00.000
2006-05-06 00:00:00.000
2006-05-07 00:00:00.000
2006-05-08 00:00:00.000
2006-05-09 00:00:00.000
2006-05-10 00:00:00.000
2006-05-11 00:00:00.000
2006-05-12 00:00:00.000
2006-05-13 00:00:00.000
2006-05-14 00:00:00.000
2006-05-15 00:00:00.000
2006-05-16 00:00:00.000
2006-05-17 00:00:00.000
2006-05-18 00:00:00.000
2006-05-19 00:00:00.000
2006-05-20 00:00:00.000
2006-05-21 00:00:00.000
2006-05-22 00:00:00.000
2006-05-23 00:00:00.000
2006-05-24 00:00:00.000
2006-05-25 00:00:00.000
2006-05-26 00:00:00.000
2006-05-27 00:00:00.000
2006-05-28 00:00:00.000
2006-05-29 00:00:00.000
2006-05-30 00:00:00.000
2006-05-31 00:00:00.000
2006-06-01 00:00:00.000
2006-06-02 00:00:00.000
2006-06-03 00:00:00.000
2006-06-04 00:00:00.000
2006-06-05 00:00:00.000
2006-06-06 00:00:00.000
2006-06-07 00:00:00.000
2006-06-08 00:00:00.000
2006-06-09 00:00:00.000
2006-06-10 00:00:00.000
2006-06-11 00:00:00.000
2006-06-12 00:00:00.000
2006-06-13 00:00:00.000
2006-06-14 00:00:00.000
2006-06-15 00:00:00.000
2006-06-16 00:00:00.000
2006-06-17 00:00:00.000
2006-06-18 00:00:00.000
2006-06-19 00:00:00.000
2006-06-20 00:00:00.000
2006-06-21 00:00:00.000
2006-06-22 00:00:00.000
2006-06-23 00:00:00.000
2006-06-24 00:00:00.000
2006-06-25 00:00:00.000
2006-06-26 00:00:00.000
2006-06-27 00:00:00.000
2006-06-28 00:00:00.000
2006-06-29 00:00:00.000
2006-06-30 00:00:00.000
2006-07-01 00:00:00.000
2006-07-02 00:00:00.000
2006-07-03 00:00:00.000
2006-07-04 00:00:00.000
2006-07-05 00:00:00.000
2006-07-06 00:00:00.000
2006-07-07 00:00:00.000
2006-07-08 00:00:00.000
2006-07-09 00:00:00.000
2006-07-10 00:00:00.000
2006-07-11 00:00:00.000
2006-07-12 00:00:00.000
2006-07-13 00:00:00.000
2006-07-14 00:00:00.000
2006-07-15 00:00:00.000
2006-07-16 00:00:00.000
2006-07-17 00:00:00.000
2006-07-18 00:00:00.000
2006-07-19 00:00:00.000
2006-07-20 00:00:00.000
2006-07-21 00:00:00.000
2006-07-22 00:00:00.000
2006-07-23 00:00:00.000
2006-07-24 00:00:00.000
2006-07-25 00:00:00.000
2006-07-26 00:00:00.000
2006-07-27 00:00:00.000
2006-07-28 00:00:00.000
2006-07-29 00:00:00.000
2006-07-30 00:00:00.000
2006-07-31 00:00:00.000
2006-08-01 00:00:00.000
2006-08-02 00:00:00.000
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2006-08-04 00:00:00.000
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2006-08-10 00:00:00.000
2006-08-11 00:00:00.000
2006-08-12 00:00:00.000
2006-08-13 00:00:00.000
2006-08-14 00:00:00.000
2006-08-15 00:00:00.000
2006-08-16 00:00:00.000
2006-08-17 00:00:00.000
2006-08-18 00:00:00.000
2006-08-19 00:00:00.000
2006-08-20 00:00:00.000
2006-08-21 00:00:00.000
2006-08-22 00:00:00.000
2006-08-23 00:00:00.000
2006-08-24 00:00:00.000
2006-08-25 00:00:00.000
2006-08-26 00:00:00.000
2006-08-27 00:00:00.000
2006-08-28 00:00:00.000
2006-08-29 00:00:00.000
2006-08-30 00:00:00.000
2006-08-31 00:00:00.000
2006-09-01 00:00:00.000
2006-09-02 00:00:00.000
2006-09-03 00:00:00.000
2006-09-04 00:00:00.000
2006-09-05 00:00:00.000
2006-09-06 00:00:00.000
2006-09-07 00:00:00.000
2006-09-08 00:00:00.000
2006-09-09 00:00:00.000
2006-09-10 00:00:00.000
2006-09-11 00:00:00.000
2006-09-12 00:00:00.000
2006-09-13 00:00:00.000
2006-09-14 00:00:00.000
2006-09-15 00:00:00.000
2006-09-16 00:00:00.000
2006-09-17 00:00:00.000
2006-09-18 00:00:00.000
2006-09-19 00:00:00.000
2006-09-20 00:00:00.000
2006-09-21 00:00:00.000
2006-09-22 00:00:00.000
2006-09-23 00:00:00.000
2006-09-24 00:00:00.000
2006-09-25 00:00:00.000
2006-09-26 00:00:00.000
2006-09-27 00:00:00.000
2006-09-28 00:00:00.000
2006-09-29 00:00:00.000
2006-09-30 00:00:00.000
2006-10-01 00:00:00.000
2006-10-02 00:00:00.000
2006-10-03 00:00:00.000
2006-10-04 00:00:00.000
2006-10-05 00:00:00.000
2006-10-06 00:00:00.000
2006-10-07 00:00:00.000
2006-10-08 00:00:00.000
2006-10-09 00:00:00.000
2006-10-10 00:00:00.000
2006-10-11 00:00:00.000
2006-10-12 00:00:00.000
2006-10-13 00:00:00.000
2006-10-14 00:00:00.000
2006-10-15 00:00:00.000
2006-10-16 00:00:00.000
2006-10-17 00:00:00.000
2006-10-18 00:00:00.000
2006-10-19 00:00:00.000
2006-10-20 00:00:00.000
2006-10-21 00:00:00.000
2006-10-22 00:00:00.000
2006-10-23 00:00:00.000
2006-10-24 00:00:00.000
2006-10-25 00:00:00.000
2006-10-26 00:00:00.000
2006-10-27 00:00:00.000
2006-10-28 00:00:00.000
2006-10-29 00:00:00.000
2006-10-30 00:00:00.000
2006-10-31 00:00:00.000
2006-11-01 00:00:00.000
2006-11-02 00:00:00.000
2006-11-03 00:00:00.000
2006-11-04 00:00:00.000
2006-11-05 00:00:00.000
2006-11-06 00:00:00.000
2006-11-07 00:00:00.000
2006-11-08 00:00:00.000
2006-11-09 00:00:00.000
2006-11-10 00:00:00.000
2006-11-11 00:00:00.000
2006-11-12 00:00:00.000
2006-11-13 00:00:00.000
2006-11-14 00:00:00.000
2006-11-15 00:00:00.000
2006-11-16 00:00:00.000
2006-11-17 00:00:00.000
2006-11-18 00:00:00.000
2006-11-19 00:00:00.000
2006-11-20 00:00:00.000
2006-11-21 00:00:00.000
2006-11-22 00:00:00.000
2006-11-23 00:00:00.000
2006-11-24 00:00:00.000
2006-11-25 00:00:00.000
2006-11-26 00:00:00.000
2006-11-27 00:00:00.000
2006-11-28 00:00:00.000
2006-11-29 00:00:00.000
2006-11-30 00:00:00.000
2006-12-01 00:00:00.000
2006-12-02 00:00:00.000
2006-12-03 00:00:00.000
2006-12-04 00:00:00.000
2006-12-05 00:00:00.000
2006-12-06 00:00:00.000
2006-12-07 00:00:00.000
2006-12-08 00:00:00.000
2006-12-09 00:00:00.000
2006-12-10 00:00:00.000
2006-12-11 00:00:00.000
2006-12-12 00:00:00.000
2006-12-13 00:00:00.000
2006-12-14 00:00:00.000
2006-12-15 00:00:00.000
2006-12-16 00:00:00.000
2006-12-17 00:00:00.000
2006-12-18 00:00:00.000
2006-12-19 00:00:00.000
2006-12-20 00:00:00.000
2006-12-21 00:00:00.000
2006-12-22 00:00:00.000
2006-12-23 00:00:00.000
2006-12-24 00:00:00.000
2006-12-25 00:00:00.000
2006-12-26 00:00:00.000
2006-12-27 00:00:00.000
2006-12-28 00:00:00.000
2006-12-29 00:00:00.000
2006-12-30 00:00:00.000
2006-12-31 00:00:00.000

(365 rows affected)

 
Related examples in the same category
1. Looping with the WHILE Statement
2. While Loop Demo
3. while loop with counter
4. While with aggregate function
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