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SQL Database Columns

If you have TABLE A with these columns (I put the data type in parenthesis, they are not actually part of the table name):

LAST_NAME(TEXT), FIRST_NAME(TEXT), MIDDLE_NAME(TEXT), DATE_OF_BIRTH(DATE),

and TABLE B with these columns:

LAST_NAME(TEXT), FIRST_NAME(TEXT), MIDDLE_NAME(TEXT), DATE_OF_EMPLOYMENT(DATE)

and you ran this UNION query:

Select A.*
From A
UNION
Select B.*
From B;

* What column name would the 4th column get?
* Would the data in the 4th column have much "meaning" or "context" at that point?

Solution Preview

SQL uses the column names of the first part of the union query as the column ...

Solution Summary

SQL Database Columns are studied.

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