Question : How to rewrite Case statement in Group By

Sql server handles this OK (Northwind example), but I'm passing this to another database system that does not allow it in Group By clauses.

How could this be rewritten without the select case in the Group By?

Thx


SELECT
  CASE WHEN c.CompanyName Like 'a%' THEN 'Begins with A' ELSE c.CompanyName END
FROM Customers c
  GROUP BY
  CASE WHEN c.CompanyName Like 'a%' THEN 'Begins with A' ELSE c.CompanyName END
  ORDER BY
  CASE WHEN c.CompanyName Like 'a%' THEN 'Begins with A' ELSE c.CompanyName END

Answer : How to rewrite Case statement in Group By

Well when all things fails, do this

SELECT GIVEMEANAME
FROM (
SELECT
  CASE WHEN c.CompanyName Like 'a%' THEN 'Begins with A' ELSE c.CompanyName END GIVEMEANAME
FROM Customers c ) A
GROUP BY GIVEMEANAME
ORDER BY GIVEMEANAME
;