MySQL查询过滤结果

Question

i don't find a solution for this and need a good tip.

This is the table:

Name,Status
A, 3
A, 4
B, 3

I like do get all results where Status is like 3 but never got Status=4.

In this example: only B should be shown. How should my query look like? Thank you!!

Answer 1

Try this :

Select t1.* 
from tableName t1
where t1.status =3 AND NOT EXISTS (SELECT 1 
                                   FROM TableName t2
                                   WHERE t1.Name = t2.Name AND t2.status = 4)

Answer 2

select t.Name
from my_table t
where t.Status in (3,4)
group by t.Status
having group_concat(t.Status) = '3'