public function joinCond(string $primKey, string $forKey, string $cOpr = "="): self
    {
        $this->qBuilder->joinCond($primKey, $forKey, $cOpr, "AND");
        return $this;
    }
public function joinCond(string $primKey, string $forKey, string $cOpr = "="): self
    {
        $this->qBuilder->joinCond($primKey, $forKey, $cOpr, "AND");
        return $this;
    }
public function joinCond ( string $ primKey , string $ forKey , string $ cOpr = "=" ) : self { $ this -> qBuilder -> joinCond ( $ primKey , $ forKey , $ cOpr , "AND" ) ; return $ this ; }
Add join condition

Adds a JOIN condition to the last join added. If no join was yet added, an
exception is raised.

@param string $primKey Key of the main table for the condition
@param string $forKey Key of the joining table
@param string $cOpr Comparison operator for the two keys
@return self
Add join condition