Data Manipulation Language (DML) is a programming language that allows users to interact with a database. DML statements can be used to retrieve data from a database, update data in a database, and delete data from a database. DML is closely related to SQL (Structured Query Language), which is a standardized language for accessing and managing data in a relational database management system (RDBMS). DML is also related to database schema, which is the structure of a database, and database management system, which is the software that manages a database.
What Does DML Mean?
DML stands for Data Manipulation Language. It’s a set of commands used in database management systems (DBMS) to perform operations that modify data in a database. These operations include:
- Inserting new rows of data into a table
- Updating existing rows of data in a table
- Deleting rows of data from a table
DML statements are used to perform a variety of tasks, such as:
- Adding new customers to a customer database
- Updating the inventory levels of products in a warehouse
- Deleting old records from a database
DML operations can be performed using a variety of tools, including:
- SQL (Structured Query Language)
- NoSQL (Not Only SQL) languages
- Database management software applications
The following table provides a summary of the different types of DML statements:
| Statement | Description |
|---|---|
| INSERT | Adds a new row to a table |
| UPDATE | Updates the data in an existing row |
| DELETE | Deletes a row from a table |
Here is an example of a DML statement:
INSERT INTO customers (name, address, phone)
VALUES ('John Doe', '123 Main Street', '555-555-5555');
This statement inserts a new row into the customers table, with the following values:
- name: John Doe
- address: 123 Main Street
- phone: 555-555-5555
Question 1:
What is the meaning of DML?
Answer:
DML (Data Manipulation Language) is a language used within a database management system (DBMS) to modify data stored in the database.
Question 2:
What are the primary functions of DML?
Answer:
The primary functions of DML include inserting, deleting, and updating data within the database.
Question 3:
How does DML differ from DDL?
Answer:
DML operates on existing data in the database, while DDL (Data Definition Language) is used to create, modify, or delete the database structure (e.g., tables, columns, indexes).
There ya go, bud! That’s the lowdown on DML. Thanks for sticking with me through all that tech-talk. If ya got any more burning questions, don’t be shy to drop by again. I’ll be chillin’ here, ready to spill the beans on whatever you need to know. Peace out for now, and have a groovy day!