Diff between Lookup Transforamtion and Merge Transformation (Inner Join Type) in SSIS Package - SQL Server Integration Services( SSIS) Tutorial

Scenario:

In this video we will perform a demo or using Merge Join with Inner Join option and Lookup and see how the both produce different results for same input rows.


What you will learn in this video

1. How to write TSQL Statement for Inner Join
2. How to use Merge Join Transformation in SSIS Package with Inner Join type
3. How to use Lookup Transformation in SSIS Package with Matched Output 
4. Find out how Inner join returns duplicate records for duplicate records

Script used in the Demo of : Difference between Merge Join Transformation ( INNER JOIN Type) and Lookup Transformation

Select * into #Temp
from (
SELECT N'1'AS [CustomerId]
        ,N'Aamir'AS [CustomerName]
        ,N'1234 Street'AS [StreetAddress]
        ,N'Sahiwal'AS [City]
        ,'PJ'AS [State]
        ,N'AS'AS [Region]

UNIONALL

SELECT N'2'AS [CustomerId]
        ,N'M Raza'AS [CustomerName]
        ,N'Test Street Address'AS [StreetAddress]
        ,N'Lahore'AS [City]
        ,N'PJ'AS [State]
        ,N'AS'AS [Region]

UNIONALL

SELECT N'3'AS [CustomerId]
        ,N'Robert'AS [CustomerName]
        ,N'1234 Street'AS [StreetAddress]
        ,N'FrankFurt'AS [City]
        ,'NA'AS [State]
        ,N'EU'AS [Region]

UNIONALL

SELECT N'4'AS [CustomerId]
        ,N'John'AS [CustomerName]
        ,N'1234 Street'AS [StreetAddress]
        ,N'Paris'AS [City]
        ,N'NA'AS [State] 
        ,N'EU'AS [Region]
    )t

--Insert into dbo.SourceTable and dbo.LookupTable
Select * into dbo.lookupTable from #Temp
Select customerid,CustomerName into dbo.SourceTable from #Temp



--Insert duplicate record
insertinto dbo.lookupTable    
SELECT N'5'AS [CustomerId]
        ,N'Aamir'AS [CustomerName]
        ,N'1234 Street'AS [StreetAddress]
        ,N'Charlotte'AS [City]
        ,N'NC'AS [State]
        ,N'NA'AS [Region]