Question

I’m trying to create a mysql table from the inner join between two other tables. I’m dealing with a database someone creates which has the following tables:

• sitematrix_sites
• sitematrix_databases

They are related by another table (I don’t know why don’t use a foreign key) called sitematrix_sites_databases which has the following fields:
site_id and database_id.

That’s how the two tables relate. Now I’m trying to remove that to make my life easier, so I have:

mysql> CREATE TABLE result AS(select * from sitematrix_databases INNER JOIN site
matrix_site_databases ON sitematrix_site_databases.database_id = sitematrix_data
bases.database_id);
ERROR 1060 (42S21): Duplicate column name 'database_id'

However, I’m getting that error. Does someone know how can I merge the two tables without repeating the database_id field?

Thanks

Answer 1

Remove the * in your SELECT statement and actually list out the columns you want in your new table. For columns that appear in both original tables, name the table as well (e.g. sitematrix_databases.database_id).