Which of the following command is a type of Data Definition language command?a.Deleteb.Mergec.Created.Update

Break Down the Problem

1. Identify the different types of SQL commands.
2. Understand what Data Definition Language (DDL) includes.
3. Determine which options fall under DDL.

Relevant Concepts

1. Data Definition Language (DDL): Includes commands that define the structure of a database, such as creating, altering, and deleting tables. Common DDL commands include CREATE, ALTER, and DROP.
2. Other Commands:
   • DELETE: Part of Data Manipulation Language (DML), used to remove records.
   • MERGE: Can be associated with both DML and sometimes with DDL, but primarily used for merging records.
   • UPDATE: A DML command used to modify existing records in a database.

Analysis and Detail

1. Create: This is a DDL command used to create database objects like tables.
2. Delete: A DML command, as it manipulates data rather than defining the structure.
3. Merge: This command is generally not classified strictly as DDL; it integrates data but does not define a structure.
4. Update: Another DML command used to alter existing data.

Verify and Summarize

Upon review, the only option that qualifies as a Data Definition Language command is Create.

Final Answer

The command that is a type of Data Definition Language (DDL) command is: c. Create.