Equivalent of LIMIT for DB2

by

Using FETCH FIRST [n] ROWS ONLY:

http://publib.boulder.ibm.com/infocenter/dzichelp/v2r2/index.jsp?topic=/com.ibm.db29.doc.perf/db2z_fetchfirstnrows.htm

SELECT LASTNAME, FIRSTNAME, EMPNO, SALARY
  FROM EMP
  ORDER BY SALARY DESC
  FETCH FIRST 20 ROWS ONLY;

To get ranges, you’d have to use ROW_NUMBER() (since v5r4) and use that within the WHERE clause: (stolen from here: http://www.justskins.com/forums/db2-select-how-to-123209.html)

SELECT code, name, address
FROM ( 
  SELECT row_number() OVER ( ORDER BY code ) AS rid, code, name, address
  FROM contacts
  WHERE name LIKE '%Bob%' 
  ) AS t
WHERE t.rid BETWEEN 20 AND 25;

Leave a Comment

tech