How to select the COUNT() of a joined table when the joined table has a combination of multiple columns as its primary key?

Count will only return the number of non null values in a column or the number of rows in a result set for the special case of count(*) In other words count(paylog. *) isn't valid SQL You don't need a unique column in the paylog table to do a valid count, any column will do. If the join is successful it'll increment the count, if not the column's value will be null and the count stays the same If you're trying to get the count of linked rows in paylog for each row in times then you'll also need a group by times.Id clause.

Count will only return the number of non null values in a column or the number of rows in a result set for the special case of count(*). In other words count(paylog. *) isn't valid SQL.

You don't need a unique column in the paylog table to do a valid count, any column will do. If the join is successful it'll increment the count, if not the column's value will be null and the count stays the same. If you're trying to get the count of linked rows in paylog for each row in times then you'll also need a group by times.Id clause.

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