而应该列在partitioned by. partition是名为partition_column=value并且该列不存储在表文件中，只存储在...
而应该列在partitioned by. partition是名为partition_column=value并且该列不存储在表文件中，只存储在...
例子:createtemporarytablemy.table1;createexternaltablemy.table2;createtabel ifnotexistsmy.table3;-- (Note:TEMPORARY available in Hive 0.14.0 and later)CREATE[TEMPORARY] [EXTERNAL]TABLE[IFNOTEXISTS] [db_name.]table_name--定义列, 比如 id Int comment '索引', name string comment '名字'[(col_...
下面,我将详细介绍怎样通过“create table as partitioned by select”来创建分区表。 步骤一: 在Impala终端或者Hue中执行如下代码: create table mytable as select * from mytable_source; 此语句将创建一个名为mytable的表,并从mytable_source中拷贝所有的数据到这个新表中。但是这个新的mytable表并没有分区...
CREATE [EXTERNAL] TABLE [IF NOT EXISTS] table_name [(col_name data_type [COMMENT col_comment], ...)] ---指定表的名称和表的具体列信息。 [COMMENT table_comment] ---表的描述信息。 [PARTITIONED BY (col_name data_type [COMMENT col_comment], ...)] ---表的分区信息。 [...
Partitioned tables can contain complex type columns. All the partition key columns must be scalar types. Internal and external tables (EXTERNAL and LOCATION clauses): By default, Impala creates an"internal"table, where Impala manages the underlying data files for the table, and physically deletes...
> impala> create table my_part (id int) partitioned by (p int) stored as > textfile; > impala> show partitions my_part;{noformat} > Add one partition in Hive. Catalogd is not aware of it: > {code:java} > hive> alter table my_part add partition(p=0); ...
hivesqlwith 语句createtablehivecreatetableselect Create/Drop/Truncate TableCreateTable创建表Managed and External Tables 管理表和外部表Storage Formats 存储格式Row Formats & SerDe 行格式和SerDe(序列化和反序列化)Partitioned Tables 分区表External Tables 外部表CreateTableAs Sel ...
ImpalaSource ImportSettings InformixLinkedService InformixSink InformixSource InformixTableDataset IntegrationRuntime IntegrationRuntimeAuthKeyName IntegrationRuntimeAuthKeys IntegrationRuntimeAutoUpdate IntegrationRuntimeComputeProperties IntegrationRuntimeConnectionInfo IntegrationRuntimeCustomSetupScriptPrope...
创建Impala表 一个表可以拥有一个或者多个分区,每个分区以文件夹的形式单独存在表文件夹的目录下。对分区内数据进行查询,可缩小查询范围,加快数据的检索速度和可对数据按照一定的条件进行管理。 分区是在创建表的时候用PARTITIONED BY子句定义的。 CREATE EXTERNAL TABLE ...