SELECT
 COLUMN_NAME 列名,
 COLUMN_TYPE 數據類型,
  DATA_TYPE 字段類型,
 CHARACTER_MAXIMUM_LENGTH 長度,
 IS_NULLABLE 是否為空,
 COLUMN_DEFAULT 默認值,
 COLUMN_COMMENT 備注
FROM
 INFORMATION_SCHEMA.COLUMNS
where
table_schema ='庫名'
AND
table_name = '表名'