mysql订单表怎么水平分表

MySQL订单表怎么进行水平分表？

在处理大数据时，数据表会逐渐增大，需要将数据表进行分割，采用分表的方式来减轻数据库的压力。分表分为水平分表和垂直分表两种方式，本文将介绍水平分表的实现方式。

水平分表指按照一定规则将一个大表分割成多个小表存储，每个小表的结构一致，不同的数据存储在不同的小表中。

下面具体介绍如何进行水平分表：

# 创建存储过程 CREATE PROCEDURE split_order_table() BEGIN DECLARE i INT DEFAULT 0; DECLARE done INT DEFAULT FALSE; DECLARE tbl_name CHAR(64); 1. 创建分表 WHILE NOT done DO SET tbl_name = CONCAT('order_', i); IF NOT EXISTS (SELECT table_name FROM information_schema.tables WHERE table_name = tbl_name) THEN SET @sql := CONCAT('CREATE TABLE `', tbl_name, '` LIKE `order`'); PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt; END IF; SET i = i + 1; IF i = 10 THEN SET done = TRUE; END IF; END WHILE; 1. 将数据分发到各个分表中 SET i = 0; SET done = FALSE; WHILE NOT done DO SET tbl_name = CONCAT('order_', i); IF EXISTS (SELECT table_name FROM information_schema.tables WHERE table_name = tbl_name) THEN SET @sql := CONCAT('INSERT INTO `', tbl_name, '` SELECT * FROM `order` WHERE MOD(`id`, 10) = ', i); PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt; END IF; SET i = i + 1; IF i = 10 THEN SET done = TRUE; END IF; END WHILE; END;