Check out example codes for "update mysql". It will help you in understanding the concepts better.

Code Example 1

UPDATE table_name
SET column1=value, column2=value2,...
WHERE some_column=some_value

Code Example 2

UPDATE table_name

 SET column1 = value1, column2 = value2, ...

 WHERE condition;

Code Example 3

$sql = "UPDATE MyGuests SET lastname='Doe' WHERE id=2";
 
if ($conn->query($sql) === TRUE) {
    echo "Record updated successfully";
} else {
    echo "Error updating record: " . $conn->error;
}

Code Example 4

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

Code Example 5

UPDATE [LOW_PRIORITY] [IGNORE] table_name 
SET 
    column_name1 = expr1,
    column_name2 = expr2,
    ...
[WHERE
    condition];

Code Example 6

UPDATE table_name

SET column1=value, column2=value2,...

WHERE some_column=some_value 

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