Question

My table –

pid     id  subject section
1        1  7            0
2        1  12           0
3        1  13           1
4        1  13           2
5        1  13           3
6        1  14           3
7        1  14           4
8        2  15           1
9        2  16           1

Result to be obtained –

id subject total
1    7      1
1    12     1
1    13     3
1    14     2

My Query –

SELECT DISTINCT(SUBJECT), count(section)
FROM mytable
GROUP BY section
WHERE id = 1

But this is throwing an error, let me know what I am doing wrong

Error

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE id = 1' at line 4: SELECT DISTINCT(SUBJECT), count(section) FROM mytable GROUP BY section WHERE id = 1 

Answer 1

The syntax error is due to a misplaced WHERE clause. It needs to go before GROUP BY. Additionally:

• You are grouping by the column you want to sum.
• You are using DISTINCT unnecessarily.

Query should be on this line:

SELECT SUBJECT, count(section)
FROM mytable
WHERE id = 1
GROUP BY SUBJECT