alter table dw.table_name change column combined_order_id combined_order_id bigint;
alter table dw.table_name change column combined_order_id combined_order_id bigint comment '修改后的注释';
alter table dw.table_name add columns (receive_num int comment '注释');
alter table dw.table_name drop if exists partition (dt='2021-11-05');
show tables like 'test*';
alter table dw.table_name rename to dw.new_table_name;
drop table if exists dw.table_name;
create table dw.table_name
(
modifier string comment'修改者id',
update_time string comment'修改时间',
version string comment'乐观锁'
) comment '基础sku每日全量快照表'
PARTITIONED BY (`dt` STRING)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t'
STORED AS ORC TBLPROPERTIES ("ORC.COMPRESS"="SNAPPY");