Question

从2个不同的表中计算sum(frequency * weight)之后，如果总和大于某个数字，我正在尝试打印出一个语句（下面），但我一直收到一个错误，表示total是不是有效的专栏。

任何帮助将不胜感激。提前致谢

DECLARE @total INT

SELECT SUM(frequency * weight) AS total
  FROM WF, WW
 WHERE WF.word = WW.word

IF total > 30
BEGIN
  print 'Alert! Bullying post'
END
ELSE
BEGIN
  print'Normal Post'
END

Answer 1

declare @Total as Int;

select @Total = Sum( WF.Frequency * WW.Weight )
  from WF inner join
    WW on WW.Word = WF.Word;

print case when @Total > 30 then 'Alert! Bullying post!' else 'Normal post.' end;

SQL乘以2个表和打印语句的值？

1 个答案: