sku_codevarchar(225)notnull,sku_suppliervarchar(255)notnull,priority bigint notnull,quantity_type smallint notnull,quantitynumeric(16,2)notnull,PRIMARYKEY(id,partner_id))PARTITIONBYLIST(partner_id);COMMENTONTABLEtempIS'控销结果';--添加列注释COMMENTONCOLUMNtemp.idIS'主键';COMMENT...
在PARTITION BY LIST子句中,我们使用“partition_number”列进行分区,并将其指定为最后一条分区。 第五部分:向最后一条分区插入数据 一旦我们创建了最后一条分区,我们就可以向其中插入数据。以下是一个向最后一条分区插入数据的示例: sql INSERT INTO my_table (id, date_column, partition_number) VALUES (1, ...
) partition by list(country); -- 创建子表 create table test_us partition of test1 for values in ('US'); create table test_it partition of test1 for values in ('IT'); create table test_default partition of test1 default; -- 添加唯一索引, 一般结合分区键 ALTER TABLE test1 ADD UNIQUE (...
“Partition By最后一条”是一种特殊的分区方法,它将数据根据最后一条记录的某个属性进行分区。例如,我们可以根据时间戳来分区,将最新的数据放在一个分区中,以便快速访问和查询最新的数据。这种分区方式可以在需要频繁查询最新数据的场景中提高查询性能。 第三部分:如何使用“Partition By最后一条” 使用“Partition By...
下面是我如何创建父表: create table if not exists content ( key varchar(20) not NULL, value json not null default '[]'::json ) PARTITION BY LIST(key) 然后添加任何给定的子表,如: create table if not exists content_123 PARTITION OF content for VALUES in (& 浏览4提问于2021-04-07得票...
grade_level) -- 添加 grade_level 到主键 ) PARTITION BY LIST (grade_level); CREATE TABLE students_grade_level_pA PARTITION OF students FOR VALUES IN ('A'); CREATE TABLE students_grade_level_pB PARTITION OF students FOR VALUES IN ('B'); CREATE TABLE students_grade_level_pC PARTITION OF ...
PARTITION BY LIST (category); Create individual partitions for different categories CREATE TABLE products_electronics PARTITION OF products FOR VALUES IN ('Electronics', 'Appliances'); CREATE TABLE products_clothing PARTITION OF products FOR VALUES IN ('Clothing', 'Footwear'); ...
List of schemas Name | Owner ---+--- GPO | postgres information_schema | postgres pg_catalog | postgres pg_temp_1 | postgres pg_toast | postgres pg_toast_temp_1 | postgres public | postgres (7 rows) 查看role密码: select rolname...
Some people refer to it as "declarative partitioning" since you have to declare whether you mean toPARTITION BY RANGEorPARTITION BY LISTorPARTITION BY HASHwhen you are creating the table Splits large tables into many smaller tables ("partitions")—which can benefit you in terms of performance...
Partitioned tables can now be referenced as foreign keys: Can we just add regression tests to make sure that everything works fine CREATE TABLE collections_list ( key bigint, ts timestamptz, collection_id integer, value numeric, PRIMARY KEY(key, collection_id) ) PARTITION BY LIST (collection...