Learn to create SQL primary and composite keys in 15 minutes

What is primary key in SQL In the last chapter of how to create SQL table, we learned how to create tbl_employee table in our test_db database. We created a table with four columns: emp_name, emp_age, emp_salary, and joining_date. Now, what if two employees with the same names join on the same date? Or there may be scenarios where similar … Read moreLearn to create SQL primary and composite keys in 15 minutes