code: private function translateUpdate() { // @codingStandardsIgnoreLine
  		$build = array( "update {$this->table} set" );
  
  		// Add the values.
  		$values = array();
  		foreach ( $this->statements['values'] as $key => $value ) {
  			$values[] = $key . ' = ' . $this->esc_value( $value );
  		}
  
  		if ( ! empty( $values ) ) {
  			$build[] = join( ', ', $values );
  		}
  
  		// Build the where statements.
  		if ( ! empty( $this->statements['wheres'] ) ) {
  			$build[] = join( ' ', $this->statements['wheres'] );
  		}
  
  		// Build offset and limit.
  		if ( ! empty( $this->limit ) ) {
  			$build[] = $this->limit;
  		}
  
  		return join( ' ', $build );
  	}
docs: Translate the current query to an SQL update statement
  
  @return string