Crash landing on SQL Sub-Queries – A focused example
SQL is one of the common and primary tools for data scientists to communicate with relational databases. SQL, the abbreviation for Structured Query Language, is used to perform tasks such as creating, reading, updating, and deleting tables in a database. It has the reputation of being simple and easy to use. By the name of it, many of us can guess that a query within the query is a sub-query. Yes, this is correct. But not everything is a walk in the park with it, and one of the biggest challenges for newbies is to understand the use of sub-queries.
Read