SQL INSERT, UPDATE and DELETE
INSERT
INSERT INTO employees (name, dept, salary, city)
VALUES ('Asha', 'IT', 65000, 'Pune'),
('Ravi', 'HR', 42000, 'Mumbai'),
('Meera', 'IT', 78000, 'Pune'),
('Karan', 'Sales', 51000, 'Delhi'),
('Neha', 'HR', 47000, 'Pune');
Query OK, 5 rows affected
UPDATE
UPDATE employees
SET salary = salary * 1.10
WHERE dept = 'HR';
Query OK, 2 rows affected
Always use WHERE
UPDATE or DELETE without a WHERE clause changes every row in the table.DELETE
DELETE FROM employees WHERE id = 4;
Query OK, 1 row affected
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