小编use*_*173的帖子

我有下表条目。

mydb=> SELECT username, input_bytes, output_bytes, updated_at from radius_acct;

 username | input_bytes | output_bytes |       updated_at
----------+-------------+--------------+------------------------
 sandeep  |      255081 |        42154 | 2014-05-08 09:34:13+00
 sandeep  |      250281 |        42254 | 2014-05-09 09:34:14+00
 prashant |      258081 |        42354 | 2014-05-10 09:34:15+00
 arun     |         493 |         1215 | 2014-05-17 11:16:53+00
 arun     |        9421 |         3657 | 2014-05-17 11:21:38+00
 arun     |       18325 |         4504 | 2014-05-17 17:12:53+00
 prashant |      254081 |        42454 | 2014-05-11 09:34:16+00
 raj      |      255081 |        42554 | 2014-05-12 …

表结构：

SQL>DESCRIBE tipsdb;

 Name                       Null?               Type
 ----------------------------------------- -------- ----------------------------
 USERNAME                                           CHAR(20)

 MAC                                                CHAR(20)

 PASSWORD                                           CHAR(50)

SQL>

完整的表格输出：

SQL> select * from tipsdb;


USERNAME
------------------------------------------------------------

MAC

------------------------------------------------------------

PASSWORD
--------------------------------------------------------------------------------

arun

aabbccddeeff

whopee

电流输出：

SQL> select PASSWORD as user_password from tipsdb;

USER_PASSWORD

--------------------------------------------------------------------------------
whopee

预期输出：

SQL> select PASSWORD as user_password from tipsdb;

user_password
----------------------
whopee

在上面的查询中，我希望该user_password列以小写而不是大写显示。