SQL Database Columns
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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?
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SQL Database Columns are studied.
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SQL uses the column names of the first part of the union query as the column ...
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