常用命令

增加表字段
ALTER TABLE table_name ADD COLUMN `create_user_id` BIGINT DEFAULT 0 NOT NULL COMMENT '创建人';
修改字段
ALTER TABLE table_name MODIFY COLUMN address VARCHAR(200) DEFAULT '' NOT NULL COMMENT '详细地址'; 
修改字段编码
ALTER TABLE table_name MODIFY COLUMN nick_name VARCHAR(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '' COMMENT '暱称';
修改表名
ALTER TABLE table_name RENAME table_name_new;
导出数据库
mysqldump -u orange -p -h 1.1.11.111 --set-gtid-purged=off orange >/data/orange.sql
创建索引
ALTER TABLE table_name ADD INDEX index_name (column_name)
CREATE INDEX index_name ON table_name (column_name);
用命令行进入
mysql：mysql -u root -p 
修改root密码
SET PASSWORD FOR 'root'@'localhost' = PASSWORD('123456');
建立远程用户
grant all privileges on *.* to 'orange'@'%' identified by 'orange';
修改表的存储引擎 
ALTER TABLE table_name ENGINE=MYISAM
创建(分区)表
CREATE TABLE table_name (
   id VARCHAR(255) DEFAULT NULL COMMENT '记录id',
   dt VARCHAR(10) DEFAULT NULL COMMENT '分区字段'
) ENGINE=INNODB DEFAULT CHARSET=utf8 COMMENT='测试表'
PARTITION BY LIST COLUMNS(dt) 
(
    PARTITION p_20180501 VALUES IN ('20180501'),
    PARTITION p_20180502 VALUES IN ('20180502') ,
    PARTITION p_20180503 VALUES IN ('20180503')  
);
给分区表增加分区
ALTER TABLE table_name ADD PARTITION (PARTITION p_20180504 VALUES IN ('20180504'));
ALTER TABLE table_name ADD PARTITION (PARTITION p_20180505 VALUES IN ('20180505'));
查看sql_mode
SELECT @@global.sql_mode
重新设置sql_mode
SET @@global.sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';   （去掉only_full_group_by）
给查询的结果增加序号
SELECT  (@i := @i + 1) i, name,address FROM t_user,SELECT @i := 0) AS i WHERE sex = '男'


maven打包编译
mvn clean compile package -Dmaven.test.skip=true