Obtain data randomly using SQL statements

SQL Server --> SELECT TOP 50 * FROM TAB_USERS ORDER BY NEWID ();

ORACLE --> SELECT * FROM (SELECT * FROM TAB_USERS order by DBMS_RANDOM.RANDOM () where ronum <= 50

MYSQL --> SELECT * FROM TAB_USERS order by rand () LIMIT 50

{

ACCESS --> select top 50 * FROM TAB_USERS order by rnd ([field])

The query result of this statement in ACCESS is correct, but the background Code such as ASP. NET should be written as follows:

Random random = new Random (System. Guid. NewGuid (). GetHashCode ());

Int val = random. Next ();

String SQL = "SELECT TOP 50 * FROM TAB_USERS ORDER BY RND (" + (-r) + "field )";

}