解决case expressions must be constant expressions
Android Library工程写代码需要注意switch ... case语句对资源id的引用，会引发编译错误：case expressions must be constant expressions。 通常android工程生成的资源R.java，资源id声明如下： 而对 ...
原文：SELECT DISTINCT ON expressions must match initial ORDER BY expressions
开发说pg中执行sql报错，发来消息让帮看看： SELECT DISTINCT ON expressions must match initial ORDER BY expressions 详细语句如下： SELECT DISTINCT ON p no p no, p name, p manager, p manager no, p dept FROM P WHERE corporation AN ...
2019-11-15 14:32 0 292 推荐指数：
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https://stackoverflow.com/questions/30045871/sorting-the-view-based-on-frequency-in-sql-server Just like in sub queries, you can't use ORDER ...