Generating random strings with T-SQL

Question

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 1

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 2

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 3

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 4

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 5

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 6

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 7

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 8

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 9

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 10

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 11

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 12

Another simple solution with the complete alphabet:

SELECT LEFT(REPLACE(REPLACE((SELECT CRYPT_GEN_RANDOM(16) FOR XML PATH(''), BINARY BASE64),'+',''),'/',''),16);

Replace the two 16's with the desired length.

Sample result:

pzyMATe3jJwN1XkB

Answer 13

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 14

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 15

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 16

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 17

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 18

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 19

CREATE OR ALTER PROC USP_GENERATE_RANDOM_CHARACTER ( @NO_OF_CHARS INT, @RANDOM_CHAR VARCHAR(40) OUTPUT) AS BEGIN

SELECT @RANDOM_CHAR  = SUBSTRING (REPLACE(CONVERT(VARCHAR(40), NEWID()), '-',''), 1, @NO_OF_CHARS)

END /* USAGE: DECLARE @OUT VARCHAR(40) EXEC USP_GENERATE_RANDOM_CHARACTER 13,@RANDOM_CHAR = @OUT OUTPUT SELECT @OUT */

Answer 20

Small modification of Remus Rusanu code -thanks for sharing

This generate a random string and can be used without the seed value

   declare @minLen int = 1, @maxLen int = 612, @string varchar(8000);

declare @length int; 
declare @seed INT 
declare @alpha varchar(8000)
    , @digit varchar(8000)
    , @specials varchar(8000)
    , @first varchar(8000)
declare @step bigint = rand() * 2147483647;


select @alpha = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
    , @digit = '1234567890'
    , @specials = '_@#-/\ '
select @first = @alpha + '_@';

set  @seed = (rand(@step)*2147483647);


select @length = @minLen + rand(@seed) * (@maxLen-@minLen)
    , @seed = (rand((@seed+@step)%2147483647)*2147483647);



declare @dice int;
select @dice = rand(@seed) * len(@first),
    @seed = (rand((@seed+@step)%2147483647)*2147483647);
select @string = substring(@first, @dice, 1);

while 0 < @length 
begin
    select @dice = rand(@seed) * 100
        , @seed = (rand((@seed+@step)%2147483647)*2147483647);
    if (@dice < 10) -- 10% special chars
    begin
        select @dice = rand(@seed) * len(@specials)+1
            , @seed = (rand((@seed+@step)%2147483647)*2147483647);
        select @string = @string + substring(@specials, @dice, 1);
    end
    else if (@dice < 10+10) -- 10% digits
    begin
        select @dice = rand(@seed) * len(@digit)+1
            , @seed = (rand((@seed+@step)%2147483647)*2147483647);
        select @string = @string + substring(@digit, @dice, 1);
    end
    else -- rest 80% alpha
    begin
        declare @preseed int = @seed;
        select @dice = rand(@seed) * len(@alpha)+1
            , @seed = (rand((@seed+@step)%2147483647)*2147483647);

        select @string = @string + substring(@alpha, @dice, 1);
    end

    select @length = @length - 1

    end 
    SELECT @string 

Answer 21

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 22

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 23

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 24

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 25

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 26

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 27

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 28

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 29

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?

Answer 30

If you wanted to generate a pseudorandom alphanumeric string using T-SQL, how would you do it? How would you exclude characters like dollar signs, dashes, and slashes from it?