DML, as mentioned earlier, stands for Data Manipulation Language. It is a specialised language used to retrieve, modify, and delete data within a database. DML commands allow users to interact with the data stored in a database, making it a crucial tool for managing and manipulating information.
Importance of DML in Database Management
DML plays a vital role in database management systems. It allows users to perform various operations on the data, such as inserting new records, updating existing ones, and removing unwanted data. By utilizing DML commands, users can maintain data accuracy, integrity, and consistency within the database.
Common DML Commands
- SELECT: The SELECT command is used to retrieve data from one or more tables in a database. It allows users to specify the columns they want to retrieve and apply conditions to filter the results.
- INSERT: The INSERT command enables users to add new records or rows into a table. It requires users to specify the table name and provide the values for the respective columns.
- UPDATE: The UPDATE command allows users to modify existing data within a table. It enables users to set new values for specific columns based on certain conditions.
- DELETE: The DELETE command is used to remove unwanted data from a table. It allows users to specify conditions to determine which records should be deleted.
DML vs. DDL and DCL
DML should not be confused with other database-related languages such as Data Definition Language (DDL) and Data Control Language (DCL). While DML focuses on manipulating data, DDL is used to define and manage the structure of the database, including creating tables, altering their structure, or dropping them entirely. On the other hand, DCL deals with user permissions and security aspects of the database.
Conclusion
In conclusion, the full form of DML is Data Manipulation Language. It serves as a vital tool in database management systems, allowing users to retrieve, modify, and delete data within a database. By understanding the various DML commands and their functionalities, users can effectively interact with the data stored in their databases, ensuring data accuracy and integrity.
