public Condition::isNull($field) Sets

public SelectExtender::groupBy($field)

public SelectExtender::hasAllTags()

public Select::fields($table_alias, array $fields = array())

public SelectExtender::arguments()

public QueryConditionTrait::exists(SelectInterface

public SelectExtender::leftJoin($table, $alias = NULL, $condition

protected TableSortExtender::getSort()

public SelectExtender::hasTag($tag)

The fields by which to group. Type: