Question

尝试使用CASE语句根据不同的条件更新几列。但我没有看到专栏正在更新。当做一个SELECT时，CASE工作得非常好。下面是单列失败的示例更新语句。

UPDATE D
SET EnglandOrWales = CASE WHEN Name = 'crnDeathOccurredInEnglandOrWales'
                         THEN C.Data ELSE D.EnglandOrWales END
FROM @CorDeaths D
INNER JOIN CustomFieldData C
    ON C.EntityId = D.EntityID
INNER JOIN MetaData.MetaDataCustomField M
    ON C.MetaDataCustomFieldUId = M.MetaDataCustomFieldUId 
WHERE
    MetaDataAttributeHierarchyGroupId IN (50, 53)

下面的SELECT工作正常并且在没有匹配的地方返回NA并返回C.Data以匹配记录。

SELECT
    CASE WHEN Name = 'crnDeathOccurredInEnglandOrWales'
         THEN C.Data ELSE 'NA' END 
FROM @CorDeaths D
INNER JOIN CustomFieldData C
    ON C.EntityId = D.EntityID
INNER JOIN MetaData.MetaDataCustomField M
    ON C.MetaDataCustomFieldUId = M.MetaDataCustomFieldUId 
WHERE
    MetaDataAttributeHierarchyGroupId IN (50, 53)

Answer 1

尝试分开更新并添加CASE的位置：

library(htmlwidgets)

sn <- sankeyNetwork(Links = links, Nodes = nodes,
              Source = "source", Target = "target",
              Value = "value", NodeID = "name",
              fontSize = 12, nodeWidth = 30)

clickJS <- 'd3.selectAll(".link").on("click", function(d){ alert(d.value); })'
htmlwidgets::onRender(sn, clickJS)

使用CASE语句时更新列失败

1 个答案: