Question

I have many databases that uses various column-names for the same things. For example, ‘a1’ in one table and ‘a11’ in other table and so on. Those tables are mapped through the secondary table. This means, as far as I know, for example, ‘a’ might be used to map both ‘a1’ and ‘a2’ Since I am not proficient with sql, I don’t know how the actual mapping is done in the secondary (or main) table. My question is: Is there a direct way to know, by writing query to the mapped table( secondary table), the other column-name which are mapped to that column?

Answer 1

I believe AS will help you. It is used to map columns to a name you provide.

SELECT a1 AS first_a, a2 AS second_a FROM your_table;

Read more…