INSERT command is used to

A. add a single tuple to a relation

B. add multiple tuples to a relation

C. add values to specific attributes

D. insert new table

Choose the correct answer from the options given below:

The correct answer is A, B, C only.

Key Points

• The INSERT command in SQL is used to add data to tables within a database.
• Specifically, the INSERT command can perform the following actions:
  • Add a single tuple to a relation (or table): This allows the addition of a single row of data to the table.
  • Add multiple tuples to a relation: This allows the addition of multiple rows of data to the table in one command.
  • Add values to specific attributes: This allows specifying particular columns in the table to insert data into, rather than all columns.
• The INSERT command does not create new tables; it only inserts data into existing tables.

Additional Information

• The basic syntax for the INSERT command is:

  INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...);

• For adding multiple rows at once, the syntax is:

  INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...), (value3, value4, ...), ...;

• When inserting values into specific columns, the columns must be listed in the order corresponding to the values provided.
• The INSERT command ensures data integrity and consistency within relational databases by enforcing constraints and data types defined for the table columns.