Blood counting machines aspirate a very small amount of the specimen through narrow tubing followed by an aperture and a laser flow cell. Laser eye sensors count the number of cells passing through the aperature, and can identify them; this is flow cytometry.
In computing, Extract, Transform and Load (ETL) refers to a process in database usage and especially in data warehousing that performs: Data extraction â extracts data from homogeneous or heterogeneous data sources.
Integration Services contains a tool for managing Slowly Changing Dimensions called the Slowly Changing Dimension Wizard. The ETL developer supplies the names of the columns in the data flow which are used to signify new and / or changed records.