Question

我有3张桌子。我想在1个结果中选择 count ，例如：

table1=1000 records + table2=400 records + table3=200 records = 1600

1600是我想从服务器返回的结果。

MySQL内联也许？有什么建议吗？

Answer 1

select 
  (
    select count(columnname) from table1 

  ) + (
    select count(columnname) from table2

  )+ (
    select count(columnname) from table3

  )

Answer 2

试试这个......，

SELECT  (SELECT COUNT(*) FROM tbl1
        )+
        (SELECT COUNT(*)  FROM tbl2
        )+
        ( SELECT COUNT(*) FROM tbl3
        )   as 'AllCount'

Answer 3

试试这个：

SELECT ((SELECT COUNT(*) FROM tbl1 ) + (SELECT COUNT(*) FROM tbl2 ) + (SELECT COUNT(*) FROM tbl3 )) AS TotalRecords

Answer 4

    select 
    ((select count(*) from table1) + (select count(*) from table2) + (select count(*) from table3))
 as totalCount;

Answer 5

试试这个：

select sum(c) from (
  select count(*) as c from table1 
  union 
  select count(*) as c from table2 
  union 
  select count(*) as c from table3 
) tmp

那将给你总数。

Answer 6

谢谢大家的回复我有3个表，我想在1个单一结果中选择一个计数

我仍然得到这样的结果

count1 count2 count3 1235 134 234

，这不是我想要的总结果

MYSQL总计数超过1表总结果

6 个答案: