Question

Select Count(Case When an_user_plan.campaign_pid != 0 Then 1 End) As Email,
  Count(Case When an_user_plan.sms_pid != 0 Then 1 End) As Sms,
  Count(Case When an_user_plan.survey_pid != 0 Then 1 End) As Survey,
  sum(Email,Sms,Survey)as total
From an_user_plan

这个sum(Email,Sms,Survey)as total有错误如何将这三个值相加我希望总共增加三个计数值怎么做请帮帮我

Answer 1

SELECT SUM(campaign_pid != 0 +
           sms_pid != 0 +
           survey_pid != 0) AS total, ...

Answer 2

试试这个：

Select Count(Case When an_user_plan.campaign_pid != 0 Then 1 End) +
  Count(Case When an_user_plan.sms_pid != 0 Then 1 End) +
  Count(Case When an_user_plan.survey_pid != 0 Then 1 End) as total
From an_user_plan

Answer 3

虽然您没有GROUP BY子句，但您可以使用变量 -

SELECT @c1:=Count(...), @c2:=Count(...), @c1 + @c2 FROM table

否则你可以使用子查询 -

SELECT c1, c2, c1 + c2 FROM (
  SELECT Count(...) c1, Count(...) c2 FROM table) t

我的sql总和计数值

3 个答案: