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(i) $\text{DML}$ includes a query language based on both relation algebra and tuple calculus

(ii) $\text{DML}$ includes a query language based on tuple calculus

(iii) $\text{DML}$ includes a query language based on relational algebra

(iv) $\text{DML}$ includes a query language based on none of the relational algebra and tuple calculus

Which one is correct ?

  1. (i) only          
  2. (ii) only       
  3. (iii) only        
  4. (iv) only
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The SQL DML includes a query language based on both the relational algebra and and the tuple relational calculus .

It includes also commands to insert tuples into, delete tuples from, and modify tuples in the database.

Option A is the Correct Answer.

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DML is short name of Data Manipulation Language which deals with data manipulation, and includes most common SQL statements such SELECT, INSERT, UPDATE, DELETE etc, and it is used to store, modify, retrieve, delete and update data in database.

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