How can I load a large flat file into a database table using SSIS?

Question

I\'m not sure how it works so I\'m looking for the right solution. I think SSIS is the right way to go but I have never used it before

Scenario:

Every mornin

Answer 1

I would give Merge a shot. Make sure you eventually have indexes on ItemID on both the tables.

Merge [dbo].[ItemInfo] as target
using
(
    SELECT stg.ItemID, stg.ItemName, stg.ItemType
    FROM [dbo].[ItemInfo_Staging] stg
    LEFT OUTER JOIN [dbo].[ItemInfo] final
        on stg.ItemId = final.ItemId
) as SOURCE
ON SOURCE.ItemID = target.ItemID

WHEN MATCHED THEN
    Update SET
        target.ItemID = SOURCE.ItemID
        , target.ItemName = SOURCE.ItemName
        , target.ItemType = SOURCE.ItemType

WHEN NOT MATCHED BY TARGET THEN
    INSERT (ItemID, ItemName, ItemType )
        VALUES (SOURCE.ItemID, SOURCE.ItemName, SOURCE.ItemType ) 

WHEN NOT MATCHED BY SOURCE THEN
    DELETE
;