Hive 修改 查询 分区信息 列 及 表 语句 整理

show partitions t_test;

describe formatted t_test partition (sample_date="20190723", partition_name="7");

show table extended like 't_test' partition (sample_date="20190723",partition_name="7");

show partitions t_test PARTITION(sample_date=20190826, partition_name=9); 

ALTER TABLE table_name ADD PARTITION (partCol = 'value1') location 'loc1'; //示例

ALTER TABLE table_name ADD IF NOT EXISTS PARTITION (dt='20130101') LOCATION '/user/hadoop/warehouse/table_name/dt=20130101'; //一次添加一个分区

ALTER TABLE page_view ADD PARTITION (dt='2008-08-08', country='us') location '/path/to/us/part080808' PARTITION (dt='2008-08-09', country='us') location '/path/to/us/part080809';  //一次添加多个分区

ALTER TABLE login DROP IF EXISTS PARTITION (dt='2008-08-08');

ALTER TABLE page_view DROP IF EXISTS PARTITION (dt='2008-08-08', country='us');

ALTER TABLE table_name PARTITION (dt='2008-08-08') SET LOCATION "new location";

ALTER TABLE table_name PARTITION (dt='2008-08-08') RENAME TO PARTITION (dt='20080808');

ALTER TABLE table_name ADD COLUMNS (col_name STRING);  //在所有存在的列后面，但是在分区列之前添加一列

CREATE TABLE test_change (a int, b int, c int);

// will change column a's name to a1
ALTER TABLE test_change CHANGE a a1 INT; 

// will change column a's name to a1, a's data type to string, and put it after column b. The new table's structure is: b int, a1 string, c int
ALTER TABLE test_change CHANGE a a1 STRING AFTER b; 

// will change column b's name to b1, and put it as the first column. The new table's structure is: b1 int, a string, c int
ALTER TABLE test_change CHANGE b b1 INT FIRST; 

CREATE EXTERNAL TABLE `t_test`(      
   `row_key` string,                                  
   `type` string,
   `time` string,                               
   `id` string)                            
 PARTITIONED BY (
   `date` string,
   `partition` string) 

alter table table_name set TBLPROPERTIES ('EXTERNAL'='TRUE');  //内部表转外部表 

alter table table_name set TBLPROPERTIES ('EXTERNAL'='FALSE');  //外部表转内部表

ALTER TABLE table_name RENAME TO new_table_name