Tim Hunt f027922e4f MDL-54605 quiz regrading: incorrect DB query
There were two issues. With groups, the $params array was wrong
due to PHP + vs array_merge sillyness.

Also, the first column in the SQL was not necessarily unique,
so we need to use a recordset rather than get_records.
2016-05-27 08:11:32 +01:00
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