Deleting Existing Rows in a Table

The correct command to delete an existing row in a table is the "DELETE" command. This command is used in SQL (Structured Query Language) to remove one or more rows from a database table.

Here is an explanation of the DELETE command and how it is used:

DELETE Command:
The DELETE command in SQL is used to delete existing rows from a table. It allows you to specify the criteria for deleting rows based on conditions such as specific values in certain columns or a combination of multiple conditions.

Syntax:
The basic syntax for the DELETE command is as follows:

DELETE FROM table_name
WHERE condition;

- The "DELETE FROM" statement is used to specify the table from which rows need to be deleted.
- The "WHERE" clause is optional but allows you to specify the conditions for deleting rows. If no condition is provided, all rows in the table will be deleted.

Example:
Let's say we have a table named "students" with columns such as "student_id", "name", and "age". We want to delete a row where the student_id is 101. The DELETE command would look like this:

DELETE FROM students
WHERE student_id = 101;

This command will delete the row with student_id 101 from the "students" table.

Other Options:
The other options mentioned in the question, "UPDATE" and "INSERT", are not used for deleting rows in a table.
- The "UPDATE" command is used to modify existing rows by changing the values in certain columns.
- The "INSERT" command is used to add new rows to a table.

Conclusion:
To delete an existing row in a table, the correct command is the "DELETE" command. It allows you to specify the table and conditions for deleting rows. The "UPDATE" and "INSERT" commands are used for different purposes and are not suitable for deleting rows in a table.