SQL DELETE Statement
The SQL DELETE statement is used to delete records that already exist in a table. We can use the WHERE clause with the DELETE statement to delete the selected rows, otherwise all records will be deleted.
DELETE Statement Syntax :
The syntax of the DELETE statement is −
DELETE FROM table-name WHERE condition;
In this, records that satisfying the WHERE condition are to be deleted.
DELETE Statement Example :
Consider the Customer table with the following records -
CustomerID |
CustomerName |
Age |
Address |
CustomerSalary |
1 |
Aarav |
28 |
Udaipur |
28000 |
2 |
Vivaan |
25 |
Mumbai |
30000 |
3 |
Reyansh |
28 |
Chennai |
35000 |
4 |
Muhammad |
24 |
Udaipur |
50000 |
5 |
Sai |
30 |
Mumbai |
27000 |
TEST CASE 1 :- The following code is an example, which would delete the record from Customer table where CustomerName='Sai'.
DELETE FROM Customer WHERE CustomerName='Sai';
The result for the respective sql query is as follows −
CustomerID |
CustomerName |
Age |
Address |
CustomerSalary |
1 |
Aarav |
28 |
Udaipur |
28000 |
2 |
Vivaan |
25 |
Mumbai |
30000 |
3 |
Reyansh |
28 |
Chennai |
35000 |
4 |
Muhammad |
24 |
Udaipur |
50000 |
TEST CASE 2:- The following code is an example, which would delete all the records from Customer table.
DELETE FROM Customer;
The result for the respective sql query is as follows −
You have changed the database. All records have been deleted from the customer table.
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