nvl(sum())与sum(nvl())在统计的时候,那个准确?
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nvl(sum())与sum(nvl())在统计的时候,那个准确?
nvl(sum())与sum(nvl())在统计的时候,那个准确?
nvl(sum())与sum(nvl())在统计的时候,那个准确?
感觉差不多
nvl考虑到null之后才sum,逻辑上更加清楚.
nvl(sum()),只是对整体sum()考虑null,没有太大实际意义了.
推荐用sum(nvl())
nvl(sum())与sum(nvl())在统计的时候,那个准确?
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