Comments on: SQL: SELECTing a random subset of data http://atulley.wordpress.com/2009/02/06/sql-selecting-a-random-subset-of-data/ SELECT * FROM RANDOM.stuff WHERE subject IN ('Application Express','Oracle','PL/SQL','SQL') AND is_worth_blogging_about IN ('YES','MAYBE','DOUBTFUL'); Fri, 23 Oct 2009 13:31:53 +0000 http://wordpress.com/ hourly 1 By: Andrew Tulley http://atulley.wordpress.com/2009/02/06/sql-selecting-a-random-subset-of-data/#comment-931 Andrew Tulley Fri, 06 Feb 2009 22:38:46 +0000 http://atulley.wordpress.com/2009/02/06/sql-selecting-a-random-subset-of-data/#comment-931 Good point, Alex. You can use SEED if you want the same random set of data repeatedly. "<em>SEED seed_value</em>:- Specify this clause to instruct the database to attempt to return the same sample from one execution to the next. The seed_value must be an integer between 0 and 4294967295. If you omit this clause, then the resulting sample will change from one execution to the next." Good point, Alex. You can use SEED if you want the same random set of data repeatedly.

“SEED seed_value:- Specify this clause to instruct the database to attempt to return the same sample from one execution to the next. The seed_value must be an integer between 0 and 4294967295. If you omit this clause, then the resulting sample will change from one execution to the next.”

]]> By: Alex Nuijten http://atulley.wordpress.com/2009/02/06/sql-selecting-a-random-subset-of-data/#comment-930 Alex Nuijten Fri, 06 Feb 2009 18:20:00 +0000 http://atulley.wordpress.com/2009/02/06/sql-selecting-a-random-subset-of-data/#comment-930 "Some Data", the same "Some Data".. with SEED SQL> select ename, job 2 from emp sample (10) seed (4) 3 / ENAME JOB ---------- --------- FORD ANALYST SQL> / ENAME JOB ---------- --------- FORD ANALYST “Some Data”, the same “Some Data”.. with SEED
SQL> select ename, job
2 from emp sample (10) seed (4)
3 /

ENAME JOB
———- ———
FORD ANALYST

SQL> /

ENAME JOB
———- ———
FORD ANALYST

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