This topic describes how to create a hash-hash partitioned table.
Syntax
The following statement is used to create one or more hash-hash partitioned tables where each partition may contain one or more subpartitions:
CREATE TABLE [ schema. ]table_name
table_definition
PARTITION BY [LINEAR] HASH(expr) [PARTITIONS num]
SUBPARTITION BY [LINEAR] HASH(expr) [SUBPARTITIONS sub_num]
[partition_definition [, partition_definition] ...];partition_definition is:
PARTITION partition_name
(subpartition_definition [, subpartition_definition] ...)subpartition_definition is:
SUBPARTITION subpartition_nameParameters
Parameter | Description |
table_name | The name of the table. |
expr | The expression of the partition. It must be of the INT type. The string type is not supported. |
num | The number of partitions. It is only valid for hash or key partitions. |
sub_num | The number of subpartitions. It is only valid for hash or key subpartitions. |
partition_name | The name of the partition. The name must be unique within the table. |
subpartition_name | The name of the subpartition. The name must be unique within the table. |
Examples
Create a hash-hash partitioned table:
CREATE TABLE sales_hash_hash
(
dept_no INT,
part_no INT,
country varchar(20),
date DATE,
amount INT
)
PARTITION BY HASH(dept_no) PARTITIONS 9
SUBPARTITION BY HASH(part_no) SUBPARTITIONS 3
;