Question

我有一个select查询返回两个结果，我想要的是将它们保存在表类型的变量中。我就是这样做的：

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

    HttpServletRequestWrapper wrapper = new HttpServletRequestWrapper((HttpServletRequest) request) {

        @Override
        public Enumeration<String> getHeaderNames() {
            List<String> hdrs = Collections.list(super.getHeaderNames())
                    .stream()
                    .filter(h -> !h.equals(IF_MODIFIED_SINCE))
                    .collect(Collectors.toList());

            return Collections.enumeration(hdrs);
        }
    };
    chain.doFilter(wrapper, response);
}

这里，当我运行子查询时，我看到CMed是25而CPerc是43.但是，当我执行declare @CompletedTotalValues table (CMedian int, CPerc int); update @CompletedTotalValues set CMedian = t.CMed, CPercentile = t.CPerc from( Select CMed = dbo.median(case when cr.Priority = 1 then cr.Days else null end), CPerc = dbo.Percentile90(case when cr.Priority = 1 then cr.Days else null end) from A a inner join B b on b.Id = a.Id where b.StatusId = 3 ) t;时，它将两列都返回空白（它没有显示的值）。我的错误在哪里？任何建议将不胜感激

Answer 1

如果我按照您共享的查询进行操作，那么您尝试更新时甚至不会在表格变量中首先插入任何数据。是吗？

Answer 2

为什么不直接插入数据？

DECLARE @CompletedTotalValues TABLE (CMedian INT, CPerc INT);
INSERT @CompletedTotalValues (CMedian, CPerc)
SELECT  CMed = dbo.median(CASE WHEN cr.Priority = 1 THEN cr.Days END),
        CPerc = dbo.Percentile90(CASE WHENn cr.Priority = 1 THEN cr.Days END)
FROM    A 
        INNER JOIN B ON b.Id = a.Id
WHERE   b.StatusId = 3;

更新sql 2008后返回空白单元格的表类型

2 个答案: