sql server - 自己乘以值

Question

在乘法（*）运算符而不是+运算符？中有一种聚合值的方法。对于这个例子，结果将是140（4 * 5 * 7 = 140）

SELECT  SUM(V) --*?
FROM    ( SELECT    4 V
          UNION ALL
          SELECT    5
          UNION ALL
          SELECT    7
        ) Q

Answer 1

       select *
    into #a --*?
    FROM    ( SELECT    4 V
              UNION ALL
              SELECT    5
              UNION ALL
              SELECT    7
            ) Q

 select EXP(SUM(LOG(v))) As value from #a

或

SELECT  EXP(SUM(LOG(v)))
FROM    ( SELECT    4 V
          UNION ALL
          SELECT    5
          UNION ALL
          SELECT    7
        ) Q