1.mysql 导出数据库脚本：
mysqldump -h10.10.10.10 -uusername -ppassword -d dataBase > /tmp/dataBase.sql
2.mysql 导入数据库脚本：
mysql -h10.10.10.10 -uusername -ppassword -DdataBase</tmp/xxx.sql
3.mysql 查询出表结构和字段信息：
SELECT
a1.表注释,
a2.表名,
a2.列名,
a2.数据类型,
a2.字段类型,
a2.长度,
a2.是否为空,
a2.默认值,
a2.备注
FROM
(
SELECT
TABLE_NAME AS 表名,
TABLE_COMMENT AS 表注释
FROM
INFORMATION_SCHEMA. TABLES
WHERE
TABLE_SCHEMA = 'dataBaseName'
AND TABLE_NAME IN ('tableName1', 'tableName2')
) a1
INNER JOIN (
SELECT
table_name 表名,
COLUMN_NAME 列名,
COLUMN_TYPE 数据类型,
DATA_TYPE 字段类型,
CHARACTER_MAXIMUM_LENGTH 长度,
IS_NULLABLE 是否为空,
COLUMN_DEFAULT 默认值,
COLUMN_COMMENT 备注
FROM
INFORMATION_SCHEMA. COLUMNS
WHERE
table_schema = 'dataBaseName'
AND table_name IN ('tableName1', 'tableName2')
) a2 ON a1.`表名` = a2.`表名`
