SQL Server Integration Services provides a wide variety of features that helps developers to build a robust Extract, Transform and Load process. After many years contributing to SSIS related tags on Stackoverflow.com, I can say that many developers have some misunderstanding about SSIS features (SSIS OLE DB Source, SSIS Expressions, SQL Server destination …) especially those which are very similar and have some common usability. This article is a part of a series called “SSIS features face-to-face”, which aim to remove any confusion and to illustrate some of the differences between similar features provided by SQL Server Integration Services.