SELECT t.COLUMN_NAME AS 字段名称, 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.EXTRA AS PK, t.COLUMN_COMMENT AS 字段说明 FROM information_schema.COLUMNS t WHERE t.TABLE_SCHEMA='global' AND t.TABLE_NAME='news';