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SQL Aggregate functions determine and calculate values from multiple columns in a table and return a single value.

There are 7 aggregate functions in SQL:

  • AVG(): Returns the average value from specified columns.
  • COUNT(): Returns number of table rows.
  • MAX(): Returns the largest value among the records.
  • MIN(): Returns smallest value among the records.
  • SUM(): Returns the sum of specified column values.
  • FIRST(): Returns the first value.
  • LAST(): Returns last value.

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