sql command "union"

[sagidam]

I am trying to union two tables by this command on import data

"SELECT 'XXXX' AS SiteName, * FROM XXXX.dbo.jurnaltrans

union
SELECT 'YYYY' AS SiteName, * FROM YYYY.dbo.jurnaltrans"

and get this ERROR

"DataSource.Error: Microsoft SQL: Error converting data type varchar to float.
Details:
    DataSourceKind=SQL
    DataSourcePath=XXXXXXXXXX
    Message=Error converting data type varchar to float.
    Number=8114
    Class=16

PLEASE HELP

[JM_nxgn · Accepted solution]

@sagidam 

I'm not sure this is the correct place to ask a question like this, but oh well.

Have you ensured that both tables have the same number of columns, and both the order of the columns are the same and the data type.

[v-xicai · Accepted solution]

Hi @sagidam ,

The UNION operator is used to combine the result-set of two or more SELECT statements.

• Each SELECT statement within UNION must have the same number of columns
• The columns must also have similar data types
• The columns in each SELECT statement must also be in the same order

You may list the corresponding columns like syntax codes below:

SELECT City, Country FROM Customers

WHERE Country='Germany'

UNION

SELECT City, Country FROM Suppliers

WHERE Country='Germany'

ORDER BY City;

You may also create a calculated table like DAX below to combine columns using DAX .

New table= UNION (SELECTCOLUMNS(Table1,"Account Name",Table1[A]),SELECTCOLUMNS(Table2,"Account Name",Table2[B]))

For more professional SQL help, you may post your issue in SQL Server Community.

Best Regards,

Amy

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

[JM_nxgn · Accepted solution]

@sagidam 

I'm not sure this is the correct place to ask a question like this, but oh well.

Have you ensured that both tables have the same number of columns, and both the order of the columns are the same and the data type.