SQL database on the difference between the number of zero-taking is empty

Others 2020-01-07 14:39:29 views: null

SQL SERVER：　　 isnull(temp6,0)

Oracle：　　　　　　nvl(temp6,0)

mysql / sqlite：　　　ifnull(temp6,0)

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Origin www.cnblogs.com/guorongtao/p/12161134.html

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