Question

这是我的CASE声明：

case when count(distinct fcia.UserKey) > 1 and dd.FullDate between @CalcDate and @DefaultDate 
            then count(distinct fcia.UserKey)
else case when count(distinct fcia.UserKey) > 1 and dd.FullDate not between @CalcDate and @DefaultDate 
            then 0
else -1
end
end as StudentCount,

我想要只显示1个条件......

例如：

如果计数＆gt; 1然后在两个日期之间显示

如果计数＆gt; 1和NOT BETWEEN日期然后仅在不等于上述条件时显示。

最后，如果上述两个条件都不等同，则为-1。

Answer 1

您目前的尝试已接近尾声。正确的语法是：

CASE WHEN (condition1) THEN ... WHEN (condition2) THEN ... ELSE ... END

请使用此CASE声明：

CASE WHEN COUNT(DISTINCT fcia.UserKey) > 1 AND
          dd.FullDate BETWEEN @CalcDate AND @DefaultDate 
     THEN COUNT(DISTINCT fcia.UserKey)
     WHEN COUNT(DISTINCT fcia.UserKey) > 1 AND
          dd.FullDate NOT BETWEEN @CalcDate AND @DefaultDate 
     THEN 0
     ELSE -1
END AS StudentCount

SQL案例陈述（有条件）

1 个答案: