1、如何选择分库表

#客户表  rows:20万 
CREATE TABLE customer(id INT AUTO_INCREMENT,NAME VARCHAR(200),PRIMARY KEY(id)
);#订单表   rows:600万
CREATE TABLE orders(id INT AUTO_INCREMENT,order_type INT,customer_id INT,amount DECIMAL(10,2),PRIMARY KEY(id)  
); #订单详细表     rows:600万
CREATE TABLE orders_detail(id INT AUTO_INCREMENT,detail VARCHAR(2000),order_id INT,PRIMARY KEY(id)
);#订单状态字典表   rows:20
CREATE TABLE dict_order_type(id INT AUTO_INCREMENT,order_type VARCHAR(200),PRIMARY KEY(id)
);select o.*,od.detail,d.order_type 
from orders  o 
inner join orders_detail  od on o.id =od.order_id  inner join dict_order_type d on o.order_type=d.id  
where o.customer_id=xxxx

2、schema.xml

<mycat:schema xmlns:mycat="http://io.mycat/"><schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100" dataNode="dn1"><table name="customer" dataNode="dn2" ></table></schema><dataNode name="dn1" dataHost="host1" database="atguigu_mc" /><dataNode name="dn2" dataHost="host2" database="atguigu_sm" /><dataHost name="host1" maxCon="1000" minCon="10" balance="2"writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100"><heartbeat>select user()</heartbeat><writeHost host="hostm1" url="192.168.67.1:3306" user="root"password="123123"><readHost host="hosts1" url="192.168.67.131:3306" user="root"password="123123"></readHost></writeHost></dataHost><dataHost name="host2" maxCon="1000" minCon="10" balance="0"writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100"><heartbeat>select user()</heartbeat><writeHost host="hostm2" url="192.168.67.1:3306" user="root"password="123123"></writeHost></dataHost></mycat:schema>