Hive LEAD Function Guide

The lead function in Hive is used to retrieve the next value of a specified column. By specifying an offset, the lead function can be used in a query to compare operations between adjacent rows. The syntax of the lead function is as follows:

LEAD(col, offset, default)

“Where ‘col’ represents the name of the column to retrieve the next value from, ‘offset’ indicates the amount to skip, and ‘default’ is the value to return when there is no next value. The default value for ‘offset’ is 1, meaning it retrieves the value of the next row. If there is no next value, it defaults to returning null.”