獲取數據庫字段描述等信息的SQL

SET @rownum = 0 ;

SELECT 
  @rownum := @rownum + 1 AS rownum,
  COLUMN_NAME AS 列名,
  (
    CASE
      WHEN IS_NULLABLE = 'YES' 
      THEN '是' 
      ELSE '否' 
    END
  ) AS 是否爲空,
  COLUMN_COMMENT AS 列的描述,
  COLUMN_TYPE AS 類型 
FROM
  information_schema.`COLUMNS` 
WHERE TABLE_SCHEMA = 
  (SELECT 
    DATABASE()) 
  AND TABLE_NAME = ('user') 
ORDER BY ORDINAL_POSITION ;