DML
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Data manipulation language (DML) is a set of database language commands that allow users to insert, update, and delete data from a database. DML commands are used to modify the data in a database, while data definition language (DDL) commands are used to create and modify the structure of a database.
DML is an essential part of any database management system (DBMS). It allows users to add new data to a database, modify existing data, and delete data that is no longer needed. DML commands are also used to update the values of columns in a table, change the data type of a column, and add or remove constraints from a table.
There are many different types of DML commands. The most common DML commands are:
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INSERT: Adds a new row to a table. -
UPDATE: Modifies the values of columns in a row. -
DELETE: Deletes a row from a table.
DML commands can be used to perform a wide variety of tasks, including:
- Adding new records to a database
- Updating existing records
- Deleting records
- Changing the data type of a column
- Adding or removing constraints from a table
DML commands are a powerful tool for managing data in a database. They can be used to perform a wide variety of tasks, from simple data entry to complex data manipulation.
Why Learn DML?
There are many reasons to learn DML. Some of the most common reasons include:
