hive 常用命令，清空表、查询显示字段名

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 1 清空表，hive> truncate table sales_info;

hive> select * from sales_info ;
OK
123	华为Mate10	31	999.0	20
Time taken: 0.039 seconds, Fetched: 1 row(s)
hive> truncate table sales_info;
OK
Time taken: 0.091 seconds
hive> select * from sales_info ;
OK
Time taken: 0.035 seconds
hive> 

2 查询显示字段名，hive> set hive.cli.print.header=true; 

hive> set hive.cli.print.header=true; 
hive> select * from sales_info ;
OK
sku_id	sku_name	category_id3	price	sales_count
123	华为Mate10	31	999.0	20
456	华为Mate30	31	2999.0	30
789	小米5	31	800.0	20
1235	小米6	31	900.0	100
4562	OPPO Findx	31	3900.0	50
Time taken: 0.043 seconds, Fetched: 5 row(s)
hive> 

end