Question

SQL Server 2000 – 4 tables, 3 columns each. Personal ID (COTA), User (Telegestionador), and an amount-of-work value.

Tables are: Contactados, NC, FQ, OT

Example of one of them.

XAV045  QUIPILDORY    26
XAV045  QUIPILDORY    29
XAV045  QUIPILDORY    21
XAV045  QUIPILDORY    39
XAV052  LOPEZRA       29
XAV052  LOPEZRA       39
XAV052  LOPEZRA       24
XAV052  LOPEZRA       36

What I need is. A result-view with ID, USER and then the fields with the sum of the amount of work grouped by personal id/user. (there are 4 tables, so in the final view I should have 6 columns)

So, first row should be

XAV045,QUIPILDORY, 115, X, Y, Z

Being X, Y, Z the results of SUM() from the other 3 tables.

First try is this:

SELECT     
   dbo.Contactados.COTA, dbo.Contactados.telegestionador, 
   SUM(dbo.Contactados.Total) AS Total, 
   SUM(dbo.OT.Total) AS [Cont-Der], 
   SUM(dbo.FQ.FQ) AS Cerrados, 
   SUM(dbo.NC.Total) AS NC
FROM
   dbo.Contactados 
LEFT OUTER JOIN
   dbo.OT ON dbo.Contactados.COTA = dbo.OT.COTA AND dbo.Contactados.telegestionador = dbo.OT.telegestionador AND dbo.Contactados.FGfin = dbo.OT.FGfin 
LEFT OUTER JOIN
   dbo.FQ ON dbo.Contactados.COTA = dbo.FQ.COTA AND dbo.Contactados.telegestionador = dbo.FQ.telegestionador AND dbo.Contactados.FGfin = dbo.FQ.FGfin 
LEFT OUTER JOIN
   dbo.NC ON dbo.Contactados.COTA = dbo.NC.COTA AND dbo.Contactados.telegestionador = dbo.NC.telegestionador AND dbo.Contactados.FGfin = dbo.NC.FGfin
GROUP BY 
   dbo.Contactados.telegestionador, dbo.Contactados.COTA

It throws wrong results, I know GROUP BY groups the results, not the table rows individually. But I can’t find the proper way to do so.

Any help?

Answer 1

Assuming that all four tables have identical datatypes for the four columns, you can use a union all to list all values, and then sum those as part of a subquery:

SELECT
COTA
,Telegestionador
,SUM(CASE WHEN table_name = 'Contactados' THEN work_value ELSE 0 END) AS Contactados_sum
,SUM(CASE WHEN table_name = 'NC' THEN work_value ELSE 0 END) AS nc_sum
,SUM(CASE WHEN table_name = 'FQ' THEN work_value ELSE 0 END) AS fq_sum
,SUM(CASE WHEN table_name = 'QT' THEN work_value ELSE 0 END) AS qt_sum
FROM
(
SELECT 
COTA
,Telegestionador
,work_value
,'Contactados' as table_name
FROM Contactados
UNION ALL
SELECT 
COTA
,Telegestionador
,work_value
,'NC' as table_name
FROM NC
UNION ALL
SELECT 
COTA
,Telegestionador
,work_value
,'FQ' as table_name
FROM FQ
UNION ALL
SELECT 
COTA
,Telegestionador
,work_value
,'QT' as table_name
FROM QT
) summary
GROUP BY
COTA
,Telegestionador