1、通过information_schema.COLUMNS表

查询该表可得到所需字段信息

SELECT * FROM information_schema.COLUMNS;

如下图所示：

2、示例

下面截图是示例：

SQL语句如下

SELECT

	t.TABLE_SCHEMA AS 库名,

	t.TABLE_NAME AS 表名,

	t.COLUMN_NAME AS 字段名,

	t.COLUMN_TYPE AS 数据类型,

	CASE IFNULL(t.COLUMN_DEFAULT,'Null')

		WHEN '' THEN '空字符串'

		WHEN 'Null' THEN 'NULL'

		ELSE t.COLUMN_DEFAULT END  AS 默认值,

	CASE t.IS_NULLABLE WHEN 'YES' THEN '是' ELSE '否' END AS 是否允许为空,

	t.COLUMN_COMMENT AS 字段说明

FROM information_schema.COLUMNS t

WHERE t.TABLE_SCHEMA='feifei' AND t.TABLE_NAME='order_info';

3、导出Excel

点击导出结果即可导出