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.
Normally for these kinds of questions the answer always boils down to depend on your use case.. However, in this case, you've asked which ETL tool is better, listed two tools, but only one of them is an ETL tool. So this answer is easy, Talend. Alteryx is not an ETL tool. It is a data blending and data science tool. It is missing many of the common things you needs from ETL tools (dependency management, restart and recovery, logging and auditing). Likewise, Talend doesn't have a lot of the data mining and predictive analytics functions that Alteryx has, nor the built it integration to external data sets.