问题 I would like to implement the following logic to my Lookup query as an expression: SELECT ID, CASE @[User::ConnectionStringID] WHEN 1 THEN "NE" WHEN 2 THEN "BALT" WHEN 3 THEN "NY" WHEN 4 THEN "PA" END AS Region FROM dbo.Table; My package is executed in a loop where the connection string is dynamically updated using a config file and it loops 4 times as shown in the above logic. I realized today that the Lookup transformation has no expressions available to it and I haven't been able to find