Computer Science - Class 12
Solutions to CBSE Sample Paper - Computer Science Class 12

(iii) Delete the record of Supervisors who have salary greater than 25000

Answer

Answer by student:

DELETE FROM Personal 

WHERE Desig = "Superviser" AND Salary > 25000;

Detailed answer by teachoo:

  • The question asks us to write a SQL query to delete the record of Supervisors who have salary greater than 25000. To do this, we use the DELETE statement, which removes data from a table. The syntax of the DELETE statement is: DELETE FROM table_name WHERE condition;
    • The table_name is the name of the table that we want to delete data from. In this case, it is Personal.
    • The condition is an optional clause that specifies which rows to delete. If we omit the condition, all rows in the table will be deleted. In this case, we want to delete only those rows where Desig is “Superviser” and Salary > 25000. 
    • We use the = operator to check for equality and the > operator to check for greater than. 
    • We also use the AND operator to combine multiple conditions.
    • The semicolon (;) is used to end the SQL statement.

So, the SQL query to delete the record of Supervisors who have salary greater than 25000 is:

DELETE FROM Personal 

WHERE Desig = "Superviser" AND Salary > 25000;

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo