How to select from a table in SQL where element in a column contains only one feature of another column which in turn contains two features in itself?

Question

Lets say I have a table1 in SQL as follows.

Team   PlayerID

Team1  12
Team2  56
Team1  78
Team1  96
Team3  23
Team2  45
Team3  89
Team3  78

Now I have a new table2 as

PlayerID  Gender

12        Male
56        Female
78        Female
96        Male
23        Female
45        Male
89        Female
78        Female

Is there a way to list out all the teams with only female genders?

Answer 1

You can use join , group by , and having :

select t.team
from teams t join
     players p
     on p.playerid = t.playerid
group by t.team
having min(gender) = max(gender) and min(gender) = 'Female';

Answer 2

If you are sure to have at least 1 player per team then this should work:

SELECT T1.Team
FROM Table1 T1
LEFT JOIN Table2 T2 ON T1.PlayerID = T2.PlayerID AND t2.Gender = 'Male'
GROUP BY T1.Team
Having COUNT(Gender) = 0