Question

Just wondering how I would change the following SQL so that the insert only happens for unique link_row instances. So if the exact same values are pulled back in the seletc I only want to do the loop and insert the first time.

BEGIN   
      FOR LINK_ROW IN ( SELECT LINKTEXT, LINKURL, CORPID FROM LINKS )
      LOOP
          //Do insert here

When I run the script I get errors on the primary key violation as the same item is being inserted twice inside the loop.

Thanks in advance

Answer 1

You would use the UNIQUE or DISTINCT keyword to limit your select results.

BUT it would be far better to do the insert and select in one statement.

INSERT INTO <table>
 VALUES (linktext, linkurl, corpid)
 SELECT UNIQUE linktext, linkurl, corpid
   FROM links;