SQL Server 2005 error when grouping using subquery

Question

Using SQL Server 2005 I\'m trying to group based on a case statement with a subquery, but I\'m getting an error (\"Each GROUP BY expression must contain at least one column refe

Answer 1

You are telling it to group by 1 or 0 when you need to give it an actual column to group by (header), not value.

So if I'm understanding right you are wanting a list of the headers and a count of their detail records?

This may work for you?

SELECT DISTINCT h.header, COUNT(d.detail) AS detail_count
FROM #header AS h
LEFT JOIN #detail AS d ON d.header = h.header
GROUP BY h.header, d.detail

With results like...

header   detail_count
1       1
2       1
3       0