在Oracle SQL Developer中使用count

Question

I'm using oracle sql developer and I can't get this query to function. It's telling me its not a single group function. Please help.

SELECT LGBRAND.BRAND_NAME, LGPRODUCT.PROD_DESCRIPT,
    COUNT (LGPRODUCT.PROD_DESCRIPT) AS "NUMPRODUCTS"
FROM LGBRAND, LGPRODUCT
ORDER BY LGBRAND.BRAND_NAME;

What I'm trying to accomplish is to get the total different products grouped by each brand name.

Answer 1

when using aggregate functions you need to use group by clause

All aggregate functions like avg, count,sum needs to be used along with a group by function. If you dont use a group by clause, you are performing the function on all the rows of the table.

  SELECT LGBRAND.BRAND_NAME,
           LGPRODUCT.PROD_DESCRIPT,
           COUNT (LGPRODUCT.PROD_DESCRIPT) AS "NUMPRODUCTS"
    FROM LGBRAND, LGPRODUCT,
    GROUP BY LGBRAND.BRAND;

Answer 2

您需要使用GROUP BY子句。