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Chapter 8. Storing Small Amounts of Data > Issue Queries Without Using a Table
Hack 62. Issue Queries Without Using a Table
Some queries don’t actually need a table in order to work, but if you don’t need a table what do you put in the FROM clause? Each of the popular platforms has its own approach to providing a dummy one-row table. You cannot use these tables to store values, but they can still be useful for accessing system functions or performing calculations.
