MySQL查询显示结果

Question

My query is...

SELECT 
    tbl1.FeeName,
    SUM(tbl1.FeeAmount) AS TotAmt
FROM 
    tbl1
WHERE
    tbl1.DateTaken BETWEEN '2017-06-02' AND '2017-06-06'
GROUP BY
    tbl1.FeeId

The output is...

The table has other Fees that are not taken (transaction) between the above dates therefore not showing in the query result.

I want to show those FeeNames and the value should be 0 . Just like below (The yellow colored results).

What should I do ?

Answer 1

Try this : this will only perform sum operations of fees which are in given date range, for remaining fees this will put 0

SELECT 
tbl1.FeeName,
SUM(CASE WHEN tbl1.DateTaken BETWEEN '2017-06-02' AND '2017-06-06' 
         THEN tbl1.FeeAmount
         ELSE 0
    END) AS TotAmt
FROM tbl1
GROUP BY  tbl1.FeeId