![]() So, lead(start_date) returns NULL value.Note:The LEAD() and LAG() function are always used with OVER(). Lag Function Sql Server 2008 Plus 1 WillMissing of an over clause will raise an error. If it is omitted in query then its default value is 1. default: It is the default value return by function in-case no row precedes/succeedes the current row by N rows. If it is missing then it is by default NULL. ![]() ![]() OVER(): It defines how rows are partitioned into groups. If OVER() is empty then function compute result using all rows. Window_specification: It consist of query partition clause which determines how the query rows are partitioned and ordered. SQL LEAD() Function, This tutorial shows you how to access data of a row at a specific physical offset that follows the current row using the SQL LEAD() function. Let’s demonstrate LEAD/ LAG function using helpful and practical examples. ![]() GATE CS Original Papers and Official KeysMicrosoft Warns of Serious MS-SQL 2000 & 2005 Vulnerability. ![]()
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