$union public property This is used to construct the UNION clause(s)

cache() public method Enables query cache for this command

update() public method Creates an UPDATE SQL statement

beforeSave() public method This method is called at the

EVENT_AFTER_UPDATE event of type yii\db\AfterSaveEvent

all() public method Executes query and returns all results

loadTableSchema() protected method Loads the metadata

loadTableSchema() public method Loads the metadata for

deleteInternal() protected method Deletes an ActiveRecord

buildSubqueryInCondition() protected method Builds SQL