SQL में WHERE क्लॉज का क्या उद्देश्य है?

Consider the following dataset for a Student table: Roll_No | Name | Age | City101 | Priya | 20 | Delhi102 | Ravi | 21 | Mumbai103 | Rahul | 19 | Pune104 | Amit | 22 | Delhi105 | Sneha | 18 | Mumbai106 | Rohan | 21 | Pune Calculate the numeric output (number of rows returned) of the following SQL query evaluating combined Logical Operators: SELECT COUNT() FROM Student WHERE (NOT City = 'Delhi') AND (Age ≥ 20 OR Name LIKE 'R%');

Consider the database schema: works(employee-name, company-name, salary) Which of the following describes the effect of the SQL query? UPDATE works SET salary = salary * 1.1 WHERE company-name = 'ABC';