The UPDATE statement in MySQL allows you to modify or update existing records in a database table. You can use it to update one or more column values in one record or multiple records that already exist in the table.…
The MySQL INSERT INTO statement adds a new record (row) to a database table. If you want to store data in a MySQL table, you must use the INSERT INTO statement. For example, if you have a students table and…
The DEFAULT constraint in MySQL automatically assigns a default value to a column in a table. It provides the default value when no value is specified for that column in an INSERT statement. The DEFAULT value can be a literal…
The CHECK constraint in MySQL allows you to define a condition that data must satisfy before it can be inserted into or updated in a table. For example, suppose you have a student’s age field defined in a CREATE TABLE…
A FOREIGN KEY in MySQL is a constraint that establishes a link between two tables. It simply connects a column in one table to the PRIMARY KEY or UNIQUE KEY in another table. A FOREIGN KEY is a column or…
