MS-Access -> SELECT AS + ORDER BY = error

Question

I\'m trying to make a query to retrieve the region which got the most sales for sweet products. \'grupo_produto\' is the product type, and \'regiao\' is the region. So I got

Answer 1

You can do it like this

select * from(
  select a + b as c, * from table)
  order by c

Access has some differences compared to Sql Server.

Answer 2

Try using a subquery and order the results in an outer query.

SELECT TOP 1 * FROM
(
    SELECT
        r.nm_regiao, 
        (SELECT COUNT(*)
         FROM Dw_Empresa
         WHERE grupo_produto='1' AND cod_regiao = d.cod_regiao) as total 
    FROM Dw_Empresa d
    INNER JOIN tb_regiao r ON r.cod_regiao = d.cod_regiao
) T1
ORDER BY total DESC

(Not tested.)

Answer 3

Old Question I know, but it may help someone knowing than while you cant order by aliases, you can order by column index. For example, this will work without error :

SELECT 
 firstColumn,
 IIF(secondColumn = '', thirdColumn, secondColumn) As yourAlias
FROM
 yourTable
ORDER BY
 2 ASC

The results would then be ordered by the values found in the second column wich is the Alias "yourAlias".

Answer 4

Aliases are only usable in the query output. You can't use them in other parts of the query. Unfortunately, you'll have to copy and paste the entire subquery to make it work.

Answer 5

I suggest using an intermediate query.

 SELECT r.nm_regiao, d.grupo_produto, COUNT(*) AS total
   FROM Dw_Empresa d INNER JOIN tb_regiao r ON r.cod_regiao = d.cod_regiao
   GROUP BY r.nm_regiao, d.grupo_produto;

If you call that GroupTotalsByRegion, you can then do:

SELECT TOP 1 nm_regiao, total FROM GroupTotalsByRegion 
  WHERE grupo_produto = '1' ORDER BY total DESC

You may think it's extra work to create the intermediate query (and, in a sense, it is), but you will also find that many of your other queries will be based off of GroupTotalsByRegion. You want to avoid repeating that logic in many other queries. By keeping it in one view, you provide a simplified route to answering many other questions.

Answer 6

How about:

SELECT TOP 1  r.nm_regiao 
FROM (SELECT Dw_Empresa.cod_regiao, 
             Count(Dw_Empresa.cod_regiao) AS CountOfcod_regiao
      FROM Dw_Empresa
      WHERE Dw_Empresa.[grupo_produto]='1'
      GROUP BY Dw_Empresa.cod_regiao
      ORDER BY Count(Dw_Empresa.cod_regiao) DESC) d
INNER JOIN tb_regiao AS r 
ON d.cod_regiao = r.cod_regiao