分区策略可以是范围分区(RANGE)、列表分区(LIST)或哈希分区(HASH)。 sql CREATE TABLE sales ( id SERIAL PRIMARY KEY, sale_date DATE NOT NULL, amount NUMERIC(10, 2) ) PARTITION BY RANGE (sale_date); 2. 创建分区表 接下来,你需要为每个预定的分区范围创建一个分区表,并指定它们的父表。 sql ...
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...
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...
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...
) PARTITION BY RANGE (user_id); 1. 2. 3. 4. 5. 6. 建立分区主表时,不需要创建主键 点击查看详细原因,不需要建立索引。 2.创建分区 每个分区的定义必须指定对应于父表的分区方法和分区键的边界。注意,如果指定的边界使得新分区的值会与已有分区中的值重叠,则会导致错误。向父表中插入无法映射到任何现...
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 ...
-- 推荐使用分区键直接创建分区表 CREATE TABLE measurement ( logdate DATE NOT NULL, city_id SERIAL NOT NULL, peaktemp INT, unitsales INT ) PARTITION BY RANGE (logdate); -- 创建具体的分区 CREATE TABLE measurement_y2006m02 PARTITION OF measurement FOR VALUES FROM ('2006-02-01') TO ('2006...
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') ...