Question

I have a test table like this

CREATE TABLE #temp (
    rid INT IDENTITY (1, 1) NOT NULL,
    val INT NULL,
    CONSTRAINT pk_temp_rid PRIMARY KEY (rid)
);

What are the different methods in SQL Server to insert random integers into this table (e.g for 1000 rows). While loop, cross join or what?

I tried this but the result is not correct

DECLARE @val AS INT = 1;

WHILE @val <= 1000
    BEGIN
        INSERT #temp (val)
        SELECT RAND(@val);
        SET @val = @val + 1;
    END

SELECT *
FROM   #temp;

Answer 1

you can use select CAST(RAND() * 1000000 AS INT) AS [RandomNumber] for generating or selecting random integers .
so the full query will be something like that :

    DECLARE @t TABLE( randnum float )
DECLARE @cnt INT; SET @cnt = 0
WHILE @cnt <=10000
BEGIN
SET @cnt = @cnt + 1
INSERT INTO @t
SELECT RAND( (DATEPART(mm, GETDATE()) * 100000 )
+ (DATEPART(ss, GETDATE()) * 1000 )
+ DATEPART(ms, GETDATE()) )
END
SELECT randnum, COUNT(*)
FROM @t
GROUP BY randnum

regards..