CODEWITHSUNDEEP
sqlcountgroup-by
ydaetskcoR
ydaetskcoR

Reputation: 56887

Counting same column multiple times, already grouped

I'm trying to count all the "Y"s and "N"s in one column but group them by another column. I can get it to pull just the "Y" or the "N" with a WHERE: 

SELECT TABLE2.GROUP_BY_THIS,COUNT(TABLE1.FLAG)
FROM TABLE1 INNER JOIN
TABLE2 On TABLE1.Primary_Key = TABLE2.Foreign_Key
WHERE TABLE1.FLAG_Required = "Y"
GROUP BY TABLE2.GROUP_BY_THIS

and I can see the "Y"s and "N"s for the whole data set and not grouped by the other column using the first answer here: SQL - Counting a column twice but I'm not too sure how to get my desired outcome which should look a little like this:

GROUP_BY_THIS  Y COUNT  N COUNT
-------------------------------
GROUP1         10       1
GROUP2         10       100
GROUP3         0        10
GROUP4         50       500
GROUP5         1000     0

Do I need a further grouping somehow?

Upvotes: 2

Views: 1082

Answers (1)

Andomar
Andomar

Reputation: 238126

SELECT  TABLE2.GROUP_BY_THIS
,       COUNT(CASE WHEN TABLE1.FLAG = 'Y' THEN 1 END)
,       COUNT(CASE WHEN TABLE1.FLAG = 'N' THEN 1 END)
FROM    TABLE1 
JOIN    TABLE2 
ON      TABLE1.Primary_Key = TABLE2.Foreign_Key
GROUP BY 
        TABLE2.GROUP_BY_THIS

Upvotes: 4

Related Questions