Hi,
I am trying to apply NOLOCK syntax for my extraction query why because i am trying to load millions of records using one of the ETL tool called as PDI.
in this case i am trying to retrieve data from staging area and need to join with data mart table and should write into same data mart table. Is applying NOLOCK to my select query is good practice ??
Select * from course nolock
OR below is good practise ?
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
go
Select * from course
go
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ
Thank you
I am trying to apply NOLOCK syntax for my extraction query why because i am trying to load millions of records using one of the ETL tool called as PDI.
in this case i am trying to retrieve data from staging area and need to join with data mart table and should write into same data mart table. Is applying NOLOCK to my select query is good practice ??
Select * from course nolock
OR below is good practise ?
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
go
Select * from course
go
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ
Thank you