|insert|users|
|name|username|
|arthur dent|adent|
|ford prefect|fpref|
|zaphod beeblebrox|zaphod|

|update|users|
|username=|name|
|adent2|arthur dent|

|query|select * from users|
|name|username|
|arthur dent|adent2|
|ford prefect|fpref|
|zaphod beeblebrox|zaphod|
