Advertisements
Advertisements
प्रश्न
Write a SQL statement using the DISTINCT keyword.
Advertisements
उत्तर
DISTINCT keyword:
The DISTINCT keyword is used along with the SELECT command to eliminate duplicate rows in the table. This helps to eliminate redundant data. For
Example
SELECT DISTINCT Place FROM Student;
Will display the following data as follows :
SELECT * FROM Student;
Output
Place
Chennai
Bangalore
Delhi
APPEARS IN
संबंधित प्रश्न
The command to delete a table is ______
The clause used to sort data in a database.
Which component of SQL lets inserts values in tables and which lets to create a table?
What is a constraint?
Write a short note on Primary key constraints.
Write any three DDL commands.
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 the details of all employees who are operators.
What are the components of SQL? Write the commands in each.
Construct the following SQL statement in the student table-
SELECT statement using GROUP BY clause.
