SSIS Question:

This transformation converts the datatype of input columns to different datatype and then route the data to output columns. This transformation can be used to:
1. Change the datatype
2. If datatype is string then for setting the column length
3. If datatype is numeric then for setting decimal precision.

This data conversion transformation is very useful where you want to merge the data from different source into one. This transformation can remove the abnormality of the data. Example à The Company’s offices are located at different part of world. Each office has separate attendance tracking system in place. Some offices stores data in Access database, some in Oracle and some in SQL Server. Now you want to take data from all the offices and merged into one system. Since the datatypes in all these databases vary, it would be difficult to perform merge directly. Using this transformation, we can normalize them into single datatype and perform merge.