Which of the following is a data manipulation command?Select one:a.Alterb.Createc.Dropd.Select

Break Down the Problem

1. Identify data manipulation commands in SQL.
2. Analyze the options provided: a. Alter, b. Create, c. Drop, d. Select.

Relevant Concepts

Data Manipulation Language (DML) commands in SQL are used to manage and interact with data stored in a database. Common DML commands include:

• SELECT: Retrieves data from a database.
• INSERT: Adds data to a database.
• UPDATE: Modifies existing data.
• DELETE: Removes data from a database.

Analysis and Detail

1. a. Alter: This command is part of Data Definition Language (DDL) and is used to modify the structure of a database object, like adding a column to a table.
2. b. Create: Also a DDL command, it is used to create new database objects, such as tables or views.
3. c. Drop: Another DDL command, it removes a database object from the database, such as a table.
4. d. Select: This is a DML command used to retrieve data from one or more tables.

Verify and Summarize

Among the options, SELECT is the only data manipulation command, as it retrieves or manipulates data within the existing structure of a database.

Final Answer

The correct answer is d. Select.