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प्रश्न
Write a SQL statement to modify the student table structure by adding a new field.
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उत्तर
Syntax:
ALTER TABLE < table-name > ADD < column name >< data type >< size > ;
Example:
ALTER TABLE student ADD (age integer (3)).
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संबंधित प्रश्न
Write a query that selects all students whose age is less than 18 in order wise.
Write the difference between table constraint and column constraint?
Which component of SQL lets inserts values in tables and which lets to create a table?
What is a constraint?
Write the use of the Savepoint command with an example.
Write the different types of constraints and their functions.
Consider the following employee table. Write SQL commands for the question.
| EMP CODE | NAME | DESIG | PAY | ALLO WANCE |
| 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 |
To display all employees whose allowance is between 5000 and 7000.
Consider the following employee table. Write SQL commands for the question.
| EMP CODE | NAME | DESIG | PAY | ALLO WANCE |
| 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 |
To remove the employees who are mechanics.
What are the components of SQL? Write the commands in each.
Construct the following SQL statement in the student table-
SELECT statement using ORDER BY clause.
