Update 'tablename' SET columnname = 'value' where 'columnname' = value;
For Example(let say there is a Student Table):
Update Student SET Student_Name = "John" where Student_ID = 101;mysql> UPDATE tableName SET sometotal = sometotal+10 WHERE Id = 4;-- 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