$this addSelect(array|mixed $column) Add a new select column to the query

Builder|

Builder|

bool exists() Determine if any rows exist for the current query.

$this mergeBindings(Builder $query)

mixed value(string $column) Get a single column's value from the first

bool chunk(int $count, callable $callback) Chunk the results of the query

Builder|

string parameter(mixed $value) Get the appropriate query parameter place-holder

Builder lockForUpdate()