Codeigniter：来自一个表的多个COUNT和SUM

Question

I have MySQL table as follow:

id | ads | status | user_id |

What would be best way to get:

1. count of all rows where user_id=1 and status=1
2. count of all rows where user_id=1 and status=0
3. sum of all ads where user_id=0
4. sum of all ads where user_id=1

My question: Can I run only one query to get all 4 results? If so, would you please explain how.

Thank you in advance.

Answer 1

Try this:

select sum(if(status=1 and user_id=X, 1, 0)) as V1,
sum(if(status=1 and user_id=X, ads, 0)) as V2,
sum(if(status=0 and user_id=X, 1, 0)) as V3,
sum(if(status=0 and user_id=X, ads, 0)) as V4
FROM table)