The Ultimate Guide to High Availability with MariaDB

LAG

You are viewing an old version of this article. View the current version here.
MariaDB starting with 10.2.2

The LAG() function was first introduced with other window functions in MariaDB 10.2.

Contents

  1. Syntax
  2. Description

Syntax

LAG (expr[, offset]) OVER ( 
  [ PARTITION BY partition_expression ] 
  < ORDER BY order_list >
)

Description

The LAG function accesses data from a previous row according to the ORDER BY clause without the need for a self-join. The specific row is determined by the offset (default 1), which specifies the number of rows behind the current row to use. An offset of 0 is the current row.

Comments

Comments loading...
Content reproduced on this site is the property of its respective owners, and this content is not reviewed in advance by MariaDB. The views, information and opinions expressed by this content do not necessarily represent those of MariaDB or any other party.