How can I get the number of rows and columns that are in an SQL table?

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Thank you for such a lovely short question. The number of rows is easy:

select count(*) as rows  
  from daTable

As for the number of columns, that's a bit trickier:

select count(*) as columns
  from information_schema.columns
 where table_name = 'daTable'

The INFORMATION_SCHEMA tables (actually, they're views) are the standard SQL way of storing information about your database, and you are allowed to query them too.

This was first published in January 2007

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