Window functions were first introduced in MariaDB 10.2.0.

Window functions perform calculations across a set of rows related to the current row

Title | Description |
---|---|

Window Functions Overview | Window functions perform calculations across a set of rows related to the current row. |

AVG | Returns the average value. |

BIT_AND | Bitwise AND. |

BIT_OR | Bitwise OR. |

BIT_XOR | Bitwise XOR. |

COUNT | Returns count of non-null values. |

CUME_DIST | Window function that returns the cumulative distribution of a given row. |

DENSE_RANK | Rank of a given row with identical values receiving the same result, no skipping. |

FIRST_VALUE | Returns the first result from an ordered set. |

LAG | Accesses data from a previous row in the same result set without the need for a self-join. |

LAST_VALUE | Returns the last value in a list or set of values. |

LEAD | Accesses data from a following row in the same result set without the need for a self-join. |

MAX | Returns the maximum value. |

MEDIAN | Window function that returns the median value of a range of values. |

MIN | Returns the minimum value. |

NTH_VALUE | Returns the value evaluated at the specified row number of the window frame. |

NTILE | Returns an integer indicating which group a given row falls into. |

PERCENT_RANK | Window function that returns the relative percent rank of a given row. |

PERCENTILE_CONT | Continuous percentile. |

PERCENTILE_DISC | Discrete percentile. |

RANK | Rank of a given row with identical values receiving the same result. |

ROW_NUMBER | Row number of a given row with identical values receiving a different result. |

STD | Population standard deviation. |

STDDEV | Population standard deviation. |

STDDEV_POP | Returns the population standard deviation. |

STDDEV_SAMP | Standard deviation. |

SUM | Sum total. |

VAR_POP | Population standard variance. |

VAR_SAMP | Returns the sample variance. |

VARIANCE | Population standard variance. |

Aggregate Functions as Window Functions | It is possible to use aggregate functions as window functions. |

ColumnStore Window Functions | Summary of window function use with the ColumnStore engine |

Window Frames | Some window functions operate on window frames. |

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https://mariadb.com/kb/en/window-functions/