Create test data in SQL Server

Question

Does anyone have or know of a SQL script that will generate test data for a given table?

Ideally it will look at the schema of the table and create row(s) with test data

Answer 1

We need step by step create query for tables need entry data. i used below codes, step by step for insert test data:

1. Create a table :

CREATE TABLE dbo.TestTableSize
(
    MyKeyField VARCHAR(10) NOT NULL,
    MyDate1 DATETIME NOT NULL,
    MyDate2 DATETIME NOT NULL,
    MyDate3 DATETIME NOT NULL,
    MyDate4 DATETIME NOT NULL,
    MyDate5 DATETIME NOT NULL
)

2. Variable Declarations

DECLARE @RowCount INT
DECLARE @RowString VARCHAR(10)
DECLARE @Random INT
DECLARE @Upper INT
DECLARE @Lower INT
DECLARE @InsertDate DATETIME

3.Set on time :

SET @Lower = -730
SET @Upper = -1
SET @RowCount = 0

4.Populate the Table :

WHILE @RowCount < 3000000
BEGIN

5.Preparing Values

SET @RowString = CAST(@RowCount AS VARCHAR(10))

    SELECT @Random = ROUND(((@Upper - @Lower -1) * RAND() + @Lower), 0)

    SET @InsertDate = DATEADD(dd, @Random, GETDATE())

6. Write insert statment :

INSERT INTO TestTableSize
        (MyKeyField
        ,MyDate1
        ,MyDate2
        ,MyDate3
        ,MyDate4
        ,MyDate5)
    VALUES
        (REPLICATE('0', 10 - DATALENGTH(@RowString)) + @RowString
        , @InsertDate
        ,DATEADD(dd, 1, @InsertDate)
        ,DATEADD(dd, 2, @InsertDate)
        ,DATEADD(dd, 3, @InsertDate)
        ,DATEADD(dd, 4, @InsertDate))

    SET @RowCount = @RowCount + 1
END

7. Complete code :

DECLARE @RowCount INT
DECLARE @RowString VARCHAR(10)
DECLARE @Random INT
DECLARE @Upper INT
DECLARE @Lower INT
DECLARE @InsertDate DATETIME

SET @Lower = -730
SET @Upper = -1
SET @RowCount = 0

WHILE @RowCount < 3000000
BEGIN
    SET @RowString = CAST(@RowCount AS VARCHAR(10))
    SELECT @Random = ROUND(((@Upper - @Lower -1) * RAND() + @Lower), 0)
    SET @InsertDate = DATEADD(dd, @Random, GETDATE())

    INSERT INTO TestTableSize
        (MyKeyField
        ,MyDate1
        ,MyDate2
        ,MyDate3
        ,MyDate4
        ,MyDate5)
    VALUES
        (REPLICATE('0', 10 - DATALENGTH(@RowString)) + @RowString
        , @InsertDate
        ,DATEADD(dd, 1, @InsertDate)
        ,DATEADD(dd, 2, @InsertDate)
        ,DATEADD(dd, 3, @InsertDate)
        ,DATEADD(dd, 4, @InsertDate))

    SET @RowCount = @RowCount + 1
END