St. Britto Hr. Sec. School - Madurai
12th Computer Science Weekly Test - 1 ( Structured Query Language (SQL) )-Aug 2020
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Define Primary Key Constraint.
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Differentiate BETWEEN AND NOT BETWEEN keywords.
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Write a SQL statement using DISTINCT keyword.
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What is a constraint? Write short note on Primary key constraint.
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How will you frame the commands to work on database?
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Write a SQL statement to modify the student table structure by adding a new field.
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Which constraint helps to set a limit value placed for a field?
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Write the use of Savepoint command with an example.
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Write the different types of constraints and their functions.
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Explain ALTER command in detail.
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Consider the following employee table. Write SQL commands for the qtns.(i) to (v).
EMP CODE NAME DESIG PAY ALLOWANCE S1001 Hariharan Supervisor 29000 12000 P1002 Shaji Operator 10000 5500 P1003 Prasad Operator 12000 6500 C1004 Manjima Clerk 8000 4500 M1005 Ratheesh Mechanic 20000 7000 (i) To display the details of all employees in descending order of pay.
(ii) To display all employees whose allowance is between 5000 and 7000.
(iii) To remove the employees who are mechanic.
(iv) To add a new row.
(v) To display the details of all employees who are operators.
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Construct the following SQL statements in the student table-
(i) SELECT statement using GROUP BY clause.
(ii) SELECT statement using ORDER BY clause.