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/*mysqlÊý¾Ý¿âÖбíµÄÄÚÈÝ
mysql> select * from maindb;
+------------------+---------+-------------+---------+----------+---------------------+---------------------+---------------------+--------------------+
| id | leixing | wenjianming | zhanhao | zhanming | scsj | clsj | sxsj | baowen |
+------------------+---------+-------------+---------+----------+---------------------+---------------------+---------------------+--------------------+
| 0000000000003215 | sp | sp321654 | 12 | fuzhou | 0000-00-00 00:00:00 | 0000-00-00 00:00:00 | 0000-00-00 00:00:00 | oiyhjkghjdgfskdjfh |
| 0000000000003216 | NULL | pet.txt | 256 | ¸£ÖÝ | 1970-01-01 08:04:16 | NULL | 1970-01-01 08:09:08 |$
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