# Aggregation functions

Aggregation functions calculate a (scalar) value such as count, sum, average, minimum, or maximum for all rows in a column or table as defined by the expression.

## In this category

Function | Description |
---|---|

APPROXIMATEDISTINCTCOUNT | Returns an estimated count of unique values in a column. |

AVERAGE | Returns the average (arithmetic mean) of all the numbers in a column. |

AVERAGEA | Returns the average (arithmetic mean) of the values in a column. |

AVERAGEX | Calculates the average (arithmetic mean) of a set of expressions evaluated over a table. |

COUNT | Counts the number of rows in the specified column that contain non-blank values. |

COUNTA | Counts the number of rows in the specified column that contain non-blank values. |

COUNTAX | Counts non-blank results when evaluating the result of an expression over a table. |

COUNTBLANK | Counts the number of blank cells in a column. |

COUNTROWS | Counts the number of rows in the specified table, or in a table defined by an expression. |

COUNTX | Counts the number of rows that contain a number or an expression that evaluates to a number, when evaluating an expression over a table. |

DISTINCTCOUNT | Counts the number of distinct values in a column. |

DISTINCTCOUNTNOBLANK | Counts the number of distinct values in a column. |

MAX | Returns the largest numeric value in a column, or between two scalar expressions. |

MAXA | Returns the largest value in a column. |

MAXX | Evaluates an expression for each row of a table and returns the largest numeric value. |

MIN | Returns the smallest numeric value in a column, or between two scalar expressions. |

MINA | Returns the smallest value in a column, including any logical values and numbers represented as text. |

MINX | Returns the smallest numeric value that results from evaluating an expression for each row of a table. |

PRODUCT | Returns the product of the numbers in a column. |

PRODUCTX | Returns the product of an expression evaluated for each row in a table. |

SUM | Adds all the numbers in a column. |

SUMX | Returns the sum of an expression evaluated for each row in a table. |

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