update data mysql code example

Example 1: update query in mysql

-- Set New Employee Password 
UPDATE employee
SET employee.password = '1234'
WHERE employee.email = '[email protected]';

Example 2: update table mysql

-- Things in brackets are optional
-- IGNORE modifier updates rows even if errors occur (ie: the rows that cause errors are simply not updated)
UPDATE [IGNORE] table_name 
SET 
    column_name1 = expr1,
    column_name2 = expr2,
    ...
[WHERE 
    condition]; -- WHERE tells us which rows to update based on said condition

Example 3: update php sql

$_old_username = "Randy";
$_new_username = $_POST["username"]; 

$_sql = "UPDATE user SET first_name = $_new_username WHERE first_name = $_old_username";

Example 4: on update date mysql

ALTER TABLE t1 MODIFY post_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP

Example 5: mysql update value

UPDATE employees 
SET 
    email = '[email protected]'
WHERE
    employeeNumber = 1056;Code language: SQL (Structured Query Language) (sql)

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