sqlload日语介绍，mark一下
有关sqlload的说明资料，链接如下：
http://otndnld.oracle.co.jp/document/products/oracle10g/102/doc_cd/server.102/B19211-01/ldr_params.html
http://otndnld.oracle.co.jp/document/products/oracle10g/102/doc_cd/server.102/B19211-01/ldr_control_file.html#13765
