How to get the Count of the subgroup in SQL - sql

Question

How can I get the Count of the subgroup. I have Table1 and Table2 (below). How can I get the table Result. I tired group by but only manage to get the total rows. I am trying it in Microsoft SQL.
Table1
ID PriID Function
1 500 A
2 500 B
3 500 C
4 501 A
5 501 B
6 502 C
7 503 A
Table2
PriID Color
500 Green
501 Red
502 Green
503 Green
Result
Function Green Red Total
A 2 1 3
B 1 1 2
C 2 0 2
below is the current one I tried
SELECT t1.Function, Count(t1.PriID) as Total FROM Table1 t1
LEFT JOIN Table2 t2 on t1.PriID = t2.PriID
GROUP BY t1.function
and I get this
Result
Function Total
A 3
B 2
C 2

Answer 1

Try this
SELECT t1.Function,
SUM(CASE WHEN Color = 'Green' THEN 1 ELSE 0 END) AS Green,
SUM(CASE WHEN Color = 'Red' THEN 1 ELSE 0 END) AS Red,
Count(t1.PriID) as Total FROM Table1 t1
LEFT JOIN Table2 t2 on t1.PriID = t2.PriID
GROUP BY t1.function

Answer 2

This is the best approach for doing this stuff
;with cte as
(
select [Function],t1.priID,color
from tbl1 t1
join tbl2 t2 on t1.priID = t2.priid
),def as
(
select [Function],[Green],[Red]
from
(
select [Function],color,priID from cte) dk
Pivot (count(priID) for color in([Green],[Red] )
) pvt
) select *,green+red [Total] from def

Answer 3

select [function], ISNULL(Green, 0) Green, ISNULL(Red, 0) Red,
ISNULL(Green, 0) + ISNULL(Red, 0) Total
from
(
select *, count([function]) 'X' from
(
select t2.color, t1.[function] from table1 t1
JOIN table2 t2 on t1.prid = t2.prid
)A
group by color, [function]
)B pivot (max(X) for color IN ([Green],[Red]))as d

Answer 4

Try this:
;with cte as
(select [function],
Sum(CASE WHEN t1.PriId <> 501 Then 1 Else 0 END) over(partition by [function] order by t1.priid) Green,
Sum(CASE WHEN t1.PriId = 501 Then 1 Else 0 END) over(partition by [function] order by t1.priid) Red,
Count(*) over (partition by [function] order by t1.priid) Total,
Row_Number() over (partition by [function] order by t1.priid desc) rn
from
table1 t1
left join table2 t2 on t1.priid = t2.priid)
select [function],green,red,total
from cte
where rn = 1
This query uses windowing functions (available from SQL Server 2005 onwards), which eliminates the need for a GROUP BY clause
Demo

Answer 5

Hi you should use PIVOT to get result. Like this:
CREATE TABLE #table (id int, priID int, [FUNCTION] varchar(5))
INSERT INTO #table ( id,priID,[FUNCTION] )
VALUES ( 1, 500,'a' ), ( 2, 500,'b' ), ( 3, 500,'c' ), ( 4, 501,'a' ), ( 5, 501,'b' ), ( 6, 502,'c' )
CREATE TABLE #table2 (priID int, color varchar(20))
INSERT INTO #table2 (priID,color )
VALUES ( 500,'green' ), ( 501, 'red' ), ( 502,'yellow' )
SELECT t.[FUNCTION], t2.color, COUNT(t.priID) AS cnt
INTO #result
FROM #table AS T
INNER JOIN #table2 AS T2 ON T2.priID = T.priID
GROUP BY t.[FUNCTION], t2.color
SELECT [FUNCTION], green, red, yellow
FROM ( SELECT [FUNCTION], color, cnt
FROM #result AS R) AS p
PIVOT ( MAX(cnt) FOR color IN (green, red, yellow)) AS pvt
http://rextester.com/ROPBBS57014

Answer 6

The best way for all records in table (If you edit, delete or insert new one) is:
With t (F,PriID,Color) as
(
SELECT Table1.F, Table2.PriID, Table2.Color
FROM Table1 INNER JOIN
Table2 ON Table1.PriID = Table2.PriID
GROUP BY Table2.PriID,F,Color)
select F,Color,COUNT(F) as total from t group by F,Color
And you get this:
Result
Function Color total
A Green 2
B Green 1
C Green 2
A Red 1
B Red 1