MAPREDUCE服务 MRS-DESCRIBE OUTPUT:示例

时间：2024-11-28 20:08:14

MAPREDUCE服务 MRS

示例

--PREPARE my_select1 FROM SELECT * FROM fruit;值标识是否为别名
  DESCRIBE OUTPUT my_select1;
--PREPARE my_select2 FROM SELECT count(*) as my_count, 1+2 FROM fruit;
  DESCRIBE OUTPUT my_select2;
--PREPARE my_create FROM CREATE TABLE foo AS SELECT * FROM fruit;
  DESCRIBE OUTPUT my_create;

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