语法: split_range_partition(partition REGCLASS, split_value ANYELEMENT, partition_name TEXT DEFAULT NULL) 参数: partition REGCLASS -- 分区oid split_value ANYELEMENT -- 分裂值 partition_name TEXT DEFAULT NULL -- 分裂后新增的分区表名 语法: merge_range_partitions(partition1 REGCLASS, partition2 REGC...
Sub-partitioning can be useful to further divide partitions that are expected to become larger than other partitions. Another option is to use range partitioning with multiple columns in the partition key. Either of these can easily lead to excessive numbers of partitions, so restraint is advisable...
CREATE TABLE sales ( id SERIAL PRIMARY KEY, sale_date DATE, amount NUMERIC ) PARTITION BY RANGE (sale_date); 复制代码 创建分区:为表创建一个或多个分区。每个分区都是表的一个子集,具有相同的分区键值范围。例如,以下语句为上面创建的sales表创建了一个按月份分区的分区: CREATE TABLE sales_month PARTI...
3.PARTITION BY RANGE(partition_key) 创建范围分区。partition_key为分区键的名称。 4.PARTITION partition_name VALUES LESS THAN ( { partition_value | MAXVALUE } ) 指定各分区的信息。partition_name为范围分区的名称。partition_value为范围分区的上边界,取值依赖于partition_key的类型。MAXVALUE表示分区的上边...
CREATETABLEusers_by_date ( id SERIALPRIMARYKEY, nameVARCHAR(255)NOTNULL, registration_dateDATENOTNULL, INDEX idx_registration_date (registration_date) )PARTITIONBYRANGE(YEAR(registration_date));CREATETABLEusers_by_date_2000PARTITIONOFusers_by_dateFORVALUESFROM('2000-01-01')TO('2010-01-01');CREAT...
一、分区表 1、链接 https://blog.csdn.net/zhangyupeng0528/article/details/119423234 2、分类 列(值)分区表:partition by list(date) 范围分区表:partition by range(date) 二、临时表temp table 1、链接 http://t.zoukankan.com/lhdz_bj-p-9024183.html ...
主键必须包含分区键,因为分区表的数据是根据分区键来分布的。 2. 检查现有的分区表结构 假设我们有一个已经存在的分区表tmp_t0,其结构如下: sql CREATE TABLE tmp_t0( id bigint, logdate bigint not null, memo text ) PARTITION BY RANGE (logdate); CREATE TABLE tmp_t0_2021 PARTITION OF tmp_t0 FOR...
3.PARTITION BY RANGE(partition_key)创建范围分区。partition_key为分区键的名称。4.PARTITION partition_name VALUES LESS THAN ( { partition_value | MAXVALUE } )指定各分区的信息。partition_name为范围分区的名称。partition_value为范围分区的上边界，取值依赖于partition_key的类型。MAXVALUE表⽰分区的上边界...
CREATE TABLE partition_table ( id SERIAL PRIMARY KEY, name VARCHAR(255), date DATE ) PARTITION BY RANGE (date); 在分区表中,按日期划分表: CREATE TABLE partition_table_2023 PARTITION OF partition_table FOR VALUES FROM (‘2023-01-01’) TO (‘2023-01-01’); ...
hank=> create table tbl_test_partition (a bigint,b text,c timestamp with time zone, constraint pk_a_c primary key(a,c)) partition by range(c); CREATE TABLE #添加一个分区 hank=> CREATE TABLE tbl_test_partition_202105 PARTITION OF tbl_test_partition FOR VALUES FROM ('2021-05-01') ...