MySQL UPDATE Statement
The SQL UPDATE Statement
The UPDATE statement is used to modify the existing records in a table.
UPDATE Syntax UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition;
The following SQL statement updates the first customer (CustomerID = 1) with a new contact person and a new city.
Example UPDATE Customers SET ContactName = 'Alfred Schmidt', City= 'Frankfurt' WHERE CustomerID = 1;
UPDATE Multiple Records
It is the WHERE clause that determines how many records will be updated.
The following SQL statement will update the ContactName to “Juan” for all records where country is “Mexico”:
UPDATE Customers SET ContactName='Juan' WHERE Country='Mexico';