sql学习

1.把表批量导入导其他数据库的某表

insert into dsyh_system.api_user_address

select id id,user_id user_id,`name` `name`,phone phone,province,city,county,info,
case is_default when 1 then 1 when 99 then 0 END as is_default,insert_time as create_time ,update_time,
case is_delete when 1 then 1 when -1 then 0 end DELETE_flag
from dsyh_eshop.cm_user_address_tbl

2.mysql配置主从复制遇到的问题

change master to master_host='172.24.254.105',master_port=31857, master_user='dshb', master_password='20190923',master_log_file='binlog.000003', master_log_pos=154;

grant replication slave on *.* to 'dshb'@'localhost' identified by '20190923';

创建数据库：

CREATE DATABASE IF NOT EXISTS testDB default charset utf8 COLLATE utf8_general_ci;

创建数据库用户： create user 'csadmin'@'%' identified by '123456';
修改用户密码：update user set password=password(‘123456‘) where user=‘root‘;
创建数据库用户并允许远程登陆：grant all on *.* to admin@'%' identified by '123456' with grant option; 
给与所有权限：grant all privileges on tests.* to csadmin@'%' identified by '123456';
给与某个用户某个数据的全部权限：grant all privileges on test.* to csadmin@'%' identified by '123456';

3.网络常用

查看mac地址：arp -a
查看IP：ipconfig/all

 4.模糊查询

UPDATE dsyh_goods.bus_goods SET logo_img=REPLACE(logo_img,'/client/www.dongshanhaibao.com/','/');