SQL functions

Posted on January 7, 2008 by Raghunath Bhandari

SQL has many built-in functions for performing calculations on data.
SQL Aggregate Functions
SQL aggregate functions return a single value, calculated from values in a column.
Useful aggregate functions:

AVG() – Returns the average value
COUNT() – Returns the number of rows
FIRST() – Returns the first value
LAST() – Returns the last value
MAX() – Returns the [...]

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