SQL

mysql update

UPDATE table_name SET column1=value1, column2=value2 WHERE condition

MySQL Update

UPDATE Customers SET City='Oslo'

mysql update

UPDATE Table_name
-- The desired value
SET Column_name = desired_value
-- Any value, of the item, of which one value you want to change
WHERE Column_name = value

mysql update

UPDATE table_name SET field1 = new-value1, field2 = new-value2
[WHERE Clause]

on update date mysql

ALTER TABLE t1 MODIFY post_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP

if mysql update

mysql> update updateIfConditionDemo set UserAge =if(UserAge =23,26,UserAge);
Query OK, 4 rows affected (0.20 sec)
Rows matched: 5 Changed: 4 Warnings: 0

mysql update set

CREATE TABLE copy LIKE original;

ALTER TABLE copy DISABLE KEYS;
SET unique_checks=0; SET foreign_key_checks=0; 

INSERT INTO copy SELECT * FROM original;

ALTER TABLE copy ENABLE KEYS;
SET unique_checks=1; SET foreign_key_checks=1;