SQL Server表值函数如何报告错误?(How do SQL Server table-valued functions report errors?)
当我查询作为表值函数实现的SQL Server 2008系统动态管理视图并返回空结果集时,如何判断空结果集的原因是函数中发生错误,并且那么,那个错误是什么?
When I query a SQL Server 2008 system dynamic management view which is implemented as a table-valued function and it returns an empty result set, how can I tell that the reason for the empty result set is that an error occurs in the function, and then, what that error is?
原文:https://stackoverflow.com/questions/5084094
更新时间:2021-10-29 12:10
最满意答案
简单
\s{2,22}
,这样它将连续匹配2到22个空格Simply
\s{2,22}
, that way it will match 2 to 22 spaces in a row
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在数据帧中,如列y中所示,在列X中重复单词X次(In dataframe repeat words in a column X number of times as indicated in column y)[2022-03-09]
我们可以使用strrep with(df, strrep(x, y)) 它给出了一个没有空格的输出,但如果我们需要一个空格,那么在'x'的字符串末尾paste一个空格,做strrep并用strrep删除末尾的额外空格 df$z <- with(df, trimws(strrep(paste(x, ' '), y))) df$z #[1] "one" "two two" "three three three" We can use strrep ... -
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简单\s{2,22} ,这样它将连续匹配2到22个空格 Simply \s{2,22}, that way it will match 2 to 22 spaces in a row
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