SELECT
    [ALL | DISTINCT | DISTINCTROW ]
      [HIGH_PRIORITY]
      [STRAIGHT_JOIN]
      [SQL_SMALL_RESULT] [SQL_BIG_RESULT] [SQL_BUFFER_RESULT]
      [SQL_CACHE | SQL_NO_CACHE] [SQL_CALC_FOUND_ROWS]
    select_expr, ...
    [INTO OUTFILE 'file_name' export_options
      | INTO DUMPFILE 'file_name']
    [FROM table_references
      [WHERE where_definition]
      [GROUP BY {col_name | expr | position}
        [ASC | DESC], ... [WITH ROLLUP]]
      [HAVING where_definition]
      [ORDER BY {col_name | expr | position}
        [ASC | DESC] , ...]
      [LIMIT {[offset,] row_count | row_count OFFSET offset}]
      [PROCEDURE procedure_name(argument_list)]
      [FOR UPDATE | LOCK IN SHARE MODE]]

SELECT a,b INTO OUTFILE '/tmp/result.text' FROM test_table;