select partition_name part,partition_expression expr,partition_description descr,table_rows from information_schema.partitions where table_schema = schema() and table_name='t_send_message_send'; 1 2、查询表分区数据 select * from t_send_message_send partition(p2020); (21条消息) Mysql已有亿级数据...
create table foo_key (empno varchar(20) not null , empname varchar(20), deptno int, birthdate date not null, salary int ) partition by key(birthdate) partitions 4; (5)复合分区: 子分区是针对 RANGE/LIST 类型的分区表中每个分区的再次分割。子分区可以是 HASH/KEY 等类型。 PARTITION BY RANGE...
You can use thePARTITION BYclause included inCREATE TABLEstatement to create a partitioned table with data distributed among one or more partitions. Here is the generic syntax to create table partition in MySQL: CREATE TABLE table_name table_definition PARTITION BY partition_type ([column | expres...
CREATE TABLE sales_range ( id INT NOT NULL, sale_date DATE NOT NULL, amount DECIMAL(10, 2) NOT NULL ) PARTITION BY RANGE (YEAR(sale_date)) ( PARTITION p0 VALUES LESS THAN (2010), PARTITION p1 VALUES LESS THAN (2011), PARTITION p2 VALUES LESS THAN (2012), PARTITION p3 VALUES LESS ...
使用PARTITION BY语法创建表的基本步骤 定义表结构:首先,你需要定义表的基本结构,包括列名、数据类型等。 选择分区类型:MySQL支持多种分区类型,包括RANGE、LIST、HASH、KEY和COLUMNS分区。你需要根据数据的特点和查询需求选择合适的分区类型。 编写分区规则:在CREATE TABLE语句中,使用PARTITION BY子句定义分区规则,指定分区...
表选项也特别多,常见的如指定engine、charset。 0.7 Creating Partitioned Tables 可用于控制使用CREATE TABLE创建的表的分区。 选项也很多 0.8 Partitioning by Generated Columns 允许根据生成列进行分区。 一、CREATE TABLE Statement Retention(语句保留)
MySQL可以使用PARTITION BY子句进行表分区。以下是创建表分区的步骤: 创建一个普通的表,定义列和数据类型。 CREATE TABLE mytable ( id INT, name VARCHAR(50), age INT ); 复制代码 使用ALTER TABLE语句添加分区。 ALTER TABLE mytable PARTITION BY RANGE(id) ( PARTITION p0 VALUES LESS THAN (10), ...
在MySQL中,可以使用CREATE TABLE语句来创建一个分区表。以下是一个示例: CREATE TABLE employee ( id INT, name VARCHAR(50), salary DECIMAL(10,2) ) PARTITION BY RANGE (salary) ( PARTITION p0 VALUES LESS THAN (10000), PARTITION p1 VALUES LESS THAN (20000), PARTITION p2 VALUES LESS THAN (MAX...
create table emp( id int , name varchar(20), time varchar(10) ) partition by range (id) ( partition p1 values less than (2), partition p2 values less than (4), partition p3 values less than MAXVALUE ); Insert into emp values(1,"john","202109"),(2,"zs","202110"), ...
partition p1 values less than (1000), partition p2 values less than (2000), partition p3 values less than maxvalue ); --以员工工资为依据做范围分区。 create table emp (empno varchar(20) not null , empname varchar(20), deptno int, ...