Alter table employees add gender varchar(10); -- To add new column into table structure Alter table employees alter column gender char; --To change datatype of the column Alter table employees drop ...

This repository contains solutions to a SQL Problem Set. The tasks cover SQL Data Manipulation Language (DML), Data Definition Language (DDL), and critical thinking involving SQL queries. Each task ...

Multi-tenancy is one of the most important features in Software as a Service(SaaS). In order to reduce cost, SaaS service vendors typically implement multi-tenant enabled database on top of ...