LED Analytic Function in SQL - #5
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QUERY SOLVE -
1. What is analytic functions in SQL Server?
2. What is LEAD analytic functions in SQL Server?
3. Syntax of LEAD analytic functions?
4. What is partition by clause in SQL Server?
5. What is Order by clause in SQL Server?
6. Default parameters of LEAD analytic functions in SQL Server?
LEAD()
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The LEAD function accesses data from a subsequent row in the same result set without the use of a self-join. LEAD provides access to a row at a given physical offset that follows the current row.
Syntax :
LEAD ( scalar_expression [ ,offset ] , [ default_Value ] )
OVER ( [ partition_by_clause ] order_by_clause )
Parameters :
Scalar_expression : The value to be returned based on the specified offset. It is an expression of any type that returns a single (scalar) value.
Offset : The number of rows forward from the current row from which to obtain a value.
Default_Value : The value to return when scalar_expression at offset is NULL.
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