The correct answer is: B. specifies for the DBMS what is required; the techniques used to process data
A data manipulation language (DML) is a programming language designed for managing data in a database. It allows users to insert, update, and delete data from a database, as well as query the database for specific information.
DML statements are typically used in conjunction with a database management system (DBMS) to create, update, and retrieve data from a database. The DBMS then executes the DML statements and returns the results to the user.
There are many different DML languages available, each with its own strengths and weaknesses. Some of the most popular DML languages include SQL, PL/SQL, and T-SQL.
- SQL (Structured Query Language) is a standard DML language that is used to manage data in relational databases. SQL is a declarative language, which means that the user specifies what they want to do, not how to do it.
- PL/SQL (Procedural Language/Structured Query Language) is an extension of SQL that allows users to write procedural code in addition to SQL statements. PL/SQL is a powerful language that can be used to create complex applications.
- T-SQL (Transact-SQL) is a proprietary DML language that is used to manage data in Microsoft SQL Server databases. T-SQL is a powerful language that is similar to SQL.
DML statements are an essential part of database management. They allow users to interact with data in a database and to retrieve the information they need.
A. describes how data are structured in the data base
This is not the purpose of a DML language. A DML language is used to manipulate data, not to describe how data are structured.
C. determine how data must be structured to produce the user’s view
This is also not the purpose of a DML language. A DML language is used to manipulate data, not to determine how data must be structured.