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CREATE TABLE _Log (    l_id                  INTEGER       , # unique id    l_x_tableid           INTEGER       , # unique id in affected table    l_tablename           VARCHAR(255)  , # name of the table    l_action              VARCHAR(255)  , # INSERT, UPDATE or DELETE    l_u_action_by         INTEGER       , # action made by user    l_action_time         INTEGER       , # time of performed action  PRIMARY KEY(l_id)  );