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Have a look at some example SQL queries, it might help put words to what you want.
https://blog.hubspot.com/marketing/sql-tutorial-introduction
https://www.w3schools.com/sql/sql_select.asp
https://www.w3schools.com/sql/trysql.asp?filename=trysql_select_columns
Sumo
Follow-up question I guess is an easily accessible dictionary for this stuff.