UNION Function not working as expected

[Anonymous]

I have three tables in need to combine into one.  They have the same # of columns, same columns names, data types etc.  When I join table 1 & 2, using UNION, it works with no issues.  When I add table 3, I get the message "Each table argument of 'UNION' must have the same number of columns".   This is confusing as the tables are the same.  Any ideas on what I may be missing and where to look for the problem?

[BeaBF · Accepted solution]

@Anonymous Hi! it can be a Data Type Mismatch. Check the data types of each column in Table 3 and ensure that they match exactly with those in Table 1 and Table 2.

BBF

[dharmendars007 · Accepted solution]

Hello @Anonymous , 

Please check the number of columns and also the data types of each tables this could be the issue that is causing the problem.

If you find this helpful , please mark it as solution which will be helpful for others and Your Kudos/Likes are much appreciated!

Thank You

Dharmendar S

LinkedIN 

[Anonymous · Accepted solution]

Hi @Anonymous , hello dharmendars007  and BeaBF, thank you for your prompt reply!

As a supplement, you could also use Append Queries in power query:

Link: Append queries - Power Query | Microsoft Learn

Best regards,

Joyce

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[dharmendars007 · Accepted solution]

Hello @Anonymous , 

Please check the number of columns and also the data types of each tables this could be the issue that is causing the problem.

If you find this helpful , please mark it as solution which will be helpful for others and Your Kudos/Likes are much appreciated!

Thank You

Dharmendar S

LinkedIN 

[BeaBF · Accepted solution]

@Anonymous Hi! it can be a Data Type Mismatch. Check the data types of each column in Table 3 and ensure that they match exactly with those in Table 1 and Table 2.

BBF