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取最新一条SQL优化

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Release： 2016-06-07 17:45:03
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一开始给同事的sql是第二条，但关联查询执行起来慢，同事修改了一些第一条效率明显提升！ 最终优化SQL

    一开始给同事的sql是第二条，但关联查询执行起来慢，美国服务器，美国空间，服务器空间，同事修改了一些第一条效率明显提升！

  最终优化SQL

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