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SPEAKER: So before we go over all the ways data analysts use SQL to clean data, I want to formally introduce you to SQL. Weve talked about SQL a lot already. Youve seen some databases and some basic functions in SQL. And youve even seen how SQL can be used to process data. But now lets actually define SQL. SQL is Structured Query Language that analysts use to work with databases. Data analysts usually use SQL to deal with large data sets because it can handle huge amounts of data, and I mean trillions of rows. Thats a lot of rows to wrap your head around. So let me give you an idea about how much data that really is. Imagine a data set that contains the name of all 8 billion people in the world. It would take the average person 101 years to read all 8 billion names. SQL can process this in seconds. Personally, I think thats pretty cool. Other tools, like spreadsheets, might take a really long time to process that much data, which is one of the main reasons data analysts choose to
