DML Full Form

What is the full form of DML?

DML is the short form for "Data Manipulation Language." Data manipulation languages are a set of computer languages that have commands that permit users to add, remove, or manipulate data in a database.

1. Commands in Data Manipulation Language

The following commands are used to manipulate data in databases like SQL(sequence query language)

1. INSERT: This command is used to insert data into a database.

2. UPDATE: The data present inExisting tables are updated using this command

3. DELETE: This command is used to delete records from the existing database

4. LOCK: This command locks the contents of a table and will require the entering of a password for future edits. Thus it protects the integrity of the data in the scenario where multiple people are accessing the data concurrently.

5. CALL: It is used to call a PL/SQL or JAVA subprogram.

6. EXPLAIN PLAN: It outlines the data access route.

7. SELECT: This command helps the user retrieve data

2. Types of Data Manipulation Language

There are two variations of data manipulation language they are high-level data manipulation language and low-level data manipulation language.

1. High-level data manipulation language

• Designed for a specific time period or strongly series oriented

• Only used to determine very complex operations in the database

• arbitrary formula

• provide the data you need

• Don't specify when and how the data will be used

• For example, each SQL statement is a required command to be issued

2. Low-level data manipulation language.

• Called track-at-a-time DML

• Consolidated as a programming language for general purpose

• Essential in nature

• Distinctly state how to access and which data to access

• Example: DB2’s SQL PL, Oracle’s PL/SQL

3) Advantages of Data Manipulation Language

• Data manipulation language commands provide the flexibility to retrieve data according to your requirements by applying conditions in the WHERE clause.

• Data stored in the database can be changed at any time without problems and is very easy to do using Data manipulation language commands.

• Data manipulation language provides the ability for humans (end users of systems) to efficiently and quickly interact with back-end data stored in systems or databases.

• Various restrictions can be applied at the schema level to grant end users the ability to edit and retrieve data in a controlled environment.

• Additionally, DML does not allow end users to make schema-level changes in the database. This is also an advantage when it comes to privacy issues.

4) Disadvantages of Data Manipulation Language

• Cannot be used to change the structure of the database

• Limit table view that is data manipulation language may hide Some table columns

• Access data without storing it on the device

• It is not ideal for creating or deleting sections or lists