Updating data using ssis

This is typically done to keep errors out of the production environment as well as having strict control over the testing environment and processes.

One of the biggest problems associated with moving SSIS packages between these environments is the connections and pathways set up in the connection manager have been set for the development environment, and the only way to change them is to open the package in BIDS or VS, change them by hand, and then rebuild the project. To avoid having to rebuild packages each time they are promoted to the next environment level, best practice is to set up package configurations on these dynamic connections and pathway variables, so we can put some intelligence into each environment and let it set them up as it sees fit.

It allows a package to be flexible, so it may be used for many similar tasks; instead of hardcoding several similar packages to handle one task a piece.

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Consider if you had a connection used by 20 different packages.There are many, many resources out on the ‘Net regarding SSIS and the Lookup component and what each of its cache modes are and how to implement them in your own package.This is going to be a technical post, for those of you interested in what each cache mode does behind the scenes.This is illustrated in the SQL Profiler data: exec sp_executesql N'select * from (select id, first_name, last_name from dim_sales_rep) [ref Table] where [ref Table].[id] = @P1', N'@P1 int',1 go exec sp_executesql N'select * from (select id, first_name, last_name from dim_sales_rep) [ref Table] where [ref Table].[id] = @P1', N'@P1 int',2 go exec sp_executesql N'select * from (select id, first_name, last_name from dim_sales_rep) [ref Table] where [ref Table].[id] = @P1', N'@P1 int',3 go exec sp_executesql N'select * from (select id, first_name, last_name from dim_sales_rep) [ref Table] where [ref Table].[id] = @P1', N'@P1 int',4 go exec sp_executesql N'select * from (select id, first_name, last_name from dim_sales_rep) [ref Table] where [ref Table].[id] = @P1', N'@P1 int',5 go exec sp_unprepare 1 go In the above data, you can see at the end each sales_rep_id being passed in.Note that we only have one line for sales_rep_id = 4.

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