如何将三个不同表中的不同列合并到一张表中？

Question

Please see the picture for reference. I tried doing Union All between the first and second select statements and also between the second and third select statements. So I did two Union All but that did not work. Can someone please help?

Answer 1

When you use union , the number of columns and datatype of columns should be the same. So since your last query returns 'character', you have to convert the same column in other the queries into a string:

SELECT cast(MLDNBR as varchar(100)), cast(PLTGRN as varchar(100)), NULL as ReleaseID
FROM [DataWarehouse].[dbo].[v_Curing_Tooling] 
UNION ALL
SELECT cast(MOLDas varchar(100)), NULL, NULL
FROM [TireTrack].[dbo].[cos_work]
UNION ALL
SELECT Spec, Left (Spec,6) as SpecID, Right (Spec,2) as ReleaseID
FROM [DataWarehouse].[dbo].[Locator]

Answer 2

How is the data in v_Curing_Tooling , cos_work , and Locator related? If they are not related, they would not be on the same row. If they are related, you need an ID to join the tables on.

Example:

SELECT MLDNBR, PLTGRN, MOLD, Spec, Left (Spec,6) as 'SpecID', Right (Spec,2) as 'ReleaseID'
FROM [DataWarehouse].[dbo].[v_Curing_Tooling] t
    JOIN [TireTrack].[dbo].[cos_work] w ON t.ToolingID = w.ToolingID
    JOIN [DataWarehouse].[dbo].[Locator] l ON l.LocationID = t.LocationID

I do not know how your tables are related, though, so those JOIN clauses probably need correct join conditions.

Look up How To Join SQL Tables .