Question

I have 2 tables

Table 1

ID  Status
1   D
2   F
3   D


Table 2

SID ID  Approve
1   1   N
2   1   Y
3   1   Y
4   2   Y
5   3   Y

Result:-  Should be 
Table 1 (ID, Status)
3, D
2,F

Should not display 1 (As one of child rows have N in the Approve Column)

I need a query to joins 2 tables on ID and finds records that don not have N in their Approve column. Does anyone have any clue how to implement this?

I tried

SELECT * FROM Table1 AS t1 
INNER JOIN Table2 AS t2 
ON t2.id = t1.id 
WHERE t2.Approve != 'N' 

Doesn’t work

Answer 1

More efficient and possibly easier to read is the following:

SELECT * FROM Table1 AS t1 
LEFT JOIN Table2 AS t2 
ON t2.id = t1.id 
group by t1.id HAVING sum(t2.approve='Y') = count(t1.id)