PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions.

In the case of a join followed by a where clause, would it be better to use a subquery to limit the results, and then do the join? Example: SELECT * FROM Customers NATURAL JOIN Orders WHERE Aug 15, 2018 · Join two tables and get count in mysql:Example with hasMany relations in sequelize August 15, 2018 Consider we have two tables ‘ users ‘ and ‘ comments ‘.Each user can have multiple comments so that ‘ users ‘ and ‘ comments ‘ have ‘ hasMany ‘ relation.