CREATE [EXTERNAL] TABLE [IF NOT EXISTS] table_name [(col_name data_type [COMMENT col_comment], ...)] [COMMENT table_comment] [PARTITIONED BY (col_name data_type [COMMENT col_comment], ...)] [CLUSTERED BY (col_name, col_name, ...) [SORTED BY (col_name [ASC|DESC], ...)] ...
hive使用create建表语句格式如下: CREATE[EXTERNAL]TABLE[IF NOT EXISTS]table_name[(col_name data_type [COMMENT col_comment], ...)][COMMENT table_comment][PARTITIONED BY (col_name data_type [COMMENT col_comment], ...)][CLUSTERED BY (col_name, col_name, ...) [SORTED BY (col_name [A...
create table course (c_id string,c_name string,t_id string) clustered by(c_id) into 3 buckets row format delimited fields terminated by '\t'; 桶表的数据加载,只能通过insert overwrite。hdfs dfs -put文件或者通过load data无法加载 创建普通表,并通过insert overwrite的方式将普通表的数据通过查询的...
1.建表语法CREATE [EXTERNAL] TABLE [IF NOT EXISTS] table_name[(col_name data_type [COMMENT col_comment], …)][COMMENT table_comment][PARTITIONED BY (col_name data_type [COMMENT col_comment], …)][CLUSTERED BY (col_name, col_name, …)[SORTED BY (col_name [ASC|DESC], …)] INTO ...
CREATE[TEMPORARY][EXTERNAL]TABLE[IFNOTEXISTS][db_name.]table_name--(Note:TEMPORARYavailableinHive0.14.0and later)[(col_name data_type[COMMENTcol_comment],...[constraint_specification])][COMMENTtable_comment][PARTITIONEDBY(col_name data_type[COMMENTcol_comment],...)][CLUSTEREDBY(col_name,col...
[COMMENT table_comment] [PARTITIONED BY (col_name data_type [COMMENT col_comment], ...)] [CLUSTERED BY (col_name, col_name, ...) [SORTED BY (col_name [ASC|DESC], ...)] INTO num_buckets BUCKETS] [SKEWED BY (col_name, col_name, ...) -- (Note: Available in Hive 0.10.0 ...
CLUSTERED BY对于每一个表(table)或者分区, Hive 可以进一步组织成桶,也就是说桶是更为细粒度的数据范围划分,Hive采用对列值哈希,然后除以桶的个数求余的方式决定该条记录存放在哪个桶当中。 ROW FORMAT DELIMITED FIELDS TERMINATED BY ',', 这里指定表存储中列的分隔符,默认是 \001,这里指定的是逗号分隔符,...
CREATE[EXTERNAL]TABLE[IFNOTEXISTS]table_name[(col_namedata_type[COMMENTcol_comment],...)][COMMENTtable_comment][PARTITIONEDBY(col_namedata_type[COMMENTcol_comment],...)][CLUSTEREDBY(col_name,col_name,...)[SORTEDBY(col_name[ASC|DESC],...)]INTOnum_bucketsBUCKETS][ROWFORMATrow_format][ST...
DDL操作(数据定义语言)包括:Create、Alter、Show、Drop等。 create database- 创建新数据库 alter database - 修改数据库 drop database - 删除数据库 create table - 创建新表 alter table - 变更(改变)数据库表 drop table - 删除表 create index - 创建索引(搜索键) ...
CREATE [EXTERNAL] TABLE [IF NOT EXISTS] table_name [(col_name data_type [COMMENT col_comment], ...)] [COMMENT table_comment] [PARTITIONED BY (col_name data_type [COMMENT col_comment], ...)] [CLUSTERED BY (col_name, col_name, ...) [SORTED BY (col_name [ASC|DESC], ...)]...