Saving changes Once you have configured the constraint properties, it is essential to save these changes to the database. Until you commit your modifications, the new constraint will only exist within ...

Tasks Create the Database and Table : To start, we create a database named Sales, then define a table Orders with the specified constraints. Add a New Column : Add a new column order_quantity to the ...

Indexes and constraints are two common features of relational database management systems (RDBMS) that help improve the performance and integrity of your data. However, they also introduce some ...

Database-backed web applications manipulate large amounts of persistent data, and such applications often contain constraints that restrict data length, data value, and other data properties. Such ...