How does a pdo detect that there is no column in the database [closed]

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How does pdo detect that there is no column in a database. thanks

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Use

SELECT * FROM information_schema.columns WHERE table_name = 'table';

It will return a list of all columns in table, if none are returned, there are no columns.

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It's not actually PDO but database server. PDO send your query to the server and get an error from it.