code: public int deleteByExtension(String extensionName, String tableName)
  			throws SQLException {
  
  		DeleteBuilder<Extensions, Void> db = deleteBuilder();
  
  		setUniqueWhere(db.where(), extensionName, true, tableName, false, null);
  
  		int deleted = db.delete();
  
  		return deleted;
  	}
docs: Delete by extension name and table name
  
  @param extensionName
  extension name
  @param tableName
  table name
  @return deleted count
  @throws SQLException
  upon failure