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Databases

Gregory Ledger
Gregory Ledger
6,116 Points
Posted by Gregory Ledger
Gregory Ledger
6,116 Points

Why is it a "good practice" to alias the tables, and add them as prefixes in the SELECT and JOIN parts of the statement?

So, the video says that this is a good practice, but doesn't explain why it is better.

Please advise.

This is about Querying Relational Databases INNER JOIN video

1 Answer

Steven Parker
Steven Parker
231,007 Points
Steven Parker
Steven Parker
231,007 Points

Prefixing columns with table identifiers prevents any ambiguity due to similar column names (either now or if the tables should be expanded in the future), and using aliases instead of the full table names saves time and makes the code more compact and readable.

Gregory Ledger
Gregory Ledger
6,116 Points
Gregory Ledger
Gregory Ledger
6,116 Points

Too bad all the tasks following that exercise don't demand prefixes as part of the answer