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mysql> select (case productid when '135000000000000000704' then 'ÖйúÇø' when '0' then 'ÑÇÖÞÇø' end ) as yewu,daytime,dinggou from bytjforday where productid='135000000000000000704' limit 0,10;
+-----------+------------+---------+
| yewu | daytime | dinggou |
+-----------+------------+---------+
| ÖйúÇø | 2008-12-18 | 5 |
| ÖйúÇø | 2008-12-19 | 3 |
| ÖйúÇø | 2008-12-20 | 76 |
| ÖйúÇø | 2008-12-21 | 25 |
| ÖйúÇø | 2008-12-22 | 20 |
| ÖйúÇø | 2008-12-23 | 16 |
| ÖйúÇø | 2008-12-24 | 167 |
| ÖйúÇø | 2008-12-25 | 7 |
| ÖйúÇø | 2008-12-26 | 12 |
| ÖйúÇø | 2008-12-27 | 19 |
+-----------+------------+---------+
10 rows in set (0.00 sec)


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update ±í set introtxt=left(`fulltext`,300);

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SQL code:
DELIMITER $$
DROP FUNCTION IF EXISTS `Myf`$$
CREATE FUNCTION Myf() RETURNS va ......
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