RMI / RPC / Web Service 调用时需要客户端服务端维护同样的调用接口?
Oracle start with
Oracle rank
Oracle返回奇数行或者偶数行数据库表记录
不用max函数返回表中最大值或者最小值
Oracle 笔记
如何删除表中相同字段值的记录（比如相同的EMPNO，假设没有主键）
oracle decode
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