Thread:Project:Support desk/Import 1.15 database to 1.19 install/reply (7)

Sorry, but I'm unable to guess what could happen there.

If the database dump is correct, doing a  from the original database and on the destination database (after importing the dump script) should display the same results. If not, the sql dump is corrupted, or the database is corrupted, or you're connected to the wrong database. MediaWiki doesn't get involved on this.

This is the first thing to check. If it gives consistent results, then go to next step: running the update.php script. And then check again.