Mysql基础第二十三天,更新和删除数据

更新数据

update custmers set cust_city=replace(cust_city,'市','city') where cust_id > 1000;
update customer set cust_adderess = '新福路12号',cust_city='厦门市' where cust_id=1;
update customers set cust_city='珠海' where cust_id<5;

删除数据

delete from customers where cust_id where cust_id between 200 and 300;

更新和删除数据的指导原理