WP QueryBuilder 1.6.2 is released.
Examples
Update Statement

Update Statement

Update data in table

First parameter is the table name without table prefix.

$db::update('querybuilder', [
    'name' => 'Keramot UL',
    'email' => 'keramotul.islam@gmail.com'
])
->where('ID', '=', 10)
->andWhere('name', '=', 'Abm Sourav')
->execute();

Get raw SQL without database query execution.

$db::update('querybuilder', [
    'name' => 'Abm Sourav',
    'email' => 'keramotul.islam@gmail.com'
])
->where('ID', '=', 5)
->getSql();