CODEWITHSUNDEEP
sql-serversql-server-2008t-sql
rutruth
rutruth

Reputation: 790

Union, Join, Or GroupBy

I have procedures pulling data from various sources to give me 3 VERY similar tables.

Metric          | Tickets   |Band
______________________________________
Acknowledgement | 45        | New
Acknowledgement | 23        | Within
Acknowledgement | 16        | Near
Acknowledgement | 2         | Very Near

And

Metric     | Tickets   |Band
___________________________________
Escalation | 10        | New
Escalation | 43        | Within
Escalation | 81        | Near
Escalation | 6         | Very Near

And

Metric| Tickets   |Band
___________________________________
Fixed | 34        | New
Fixed | 52        | Within
Fixed | 36        | Near
Fixed | 4         | Very Near

Now, I would like to combine them together in some way to have one table output like this

Metric          | New   | Within | Near | Very Near
_____________________________________________________
Acknowledgement | 45    | 23     | 16   | 2
Escalation      | 10    | 43     | 81   | 6
Fixed           | 34    | 52     | 36   | 4

How can I achieve this in MS SQLServer, please ?

Upvotes: 1

Views: 116

Answers (2)

Aaron Bertrand
Aaron Bertrand

Reputation: 280383

This doesn't require repeating all of the aggregates and CASE expressions for each table - just a simple union will do, then you can pivot off of that.

SELECT Metric, [New], [Within], [Near], [Very Near] FROM 
(
            SELECT Metric, Tickets, Band FROM dbo.table_a
  UNION ALL SELECT Metric, Tickets, Band FROM dbo.table_b
  UNION ALL SELECT Metric, Tickets, Band FROM dbo.table_c
) 
AS x PIVOT 
(
  MAX(Tickets) FOR Band IN ([New],[Within],[Near],[Very Near])
) AS p;

Upvotes: 5

Stefan H
Stefan H

Reputation: 6683

This is a fake pivot that should get what you want. You would then union this query for each table.

SELECT 
    Metric,
    MAX( CASE Band WHEN 'New' THEN Tickets ELSE '' END ) New, 
    MAX( CASE Band WHEN 'Within' THEN Tickets ELSE '' END ) Within, 
    MAX( CASE Band WHEN 'Near' THEN Tickets ELSE '' END ) Near, 
    MAX( CASE Band WHEN 'Very Near' THEN Tickets ELSE '' END ) [Very Near]
FROM 
    table
GROUP BY 
    Metric

UNION
...

Upvotes: 4

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