create table date(day varchar(100) not null);
create table register(registerCount bigint not null);
create table login(loginCount bigint not null);

select day,registerCount,loginCount
from(
    select day from date where day between 20120101 and 20120103)tmp
left join(
    select registerCount from register)r on tmp.day=r.day
left join(
    select loginCount from login)l on tmp.day=l.day
group by day;

mysql> select
    ->     type,
    ->     sum(if(tmp.day = 20120101, registerCount, 0)) as '20120101',
    ->     sum(if(tmp.day = 20120102, registerCount, 0)) as '20120102',
    ->     sum(if(tmp.day = 20120103, registerCount, 0)) as '20120103'
    -> from
    ->     (
    ->     select day
    ->     from date
    ->     where day between 20120101 and 20120103
    ->     )tmp
    ->     left join
    ->     (
    ->     select
    ->     day,
    ->     "registerCount" as type,
    ->     registerCount
    ->     from register
    ->     ) r
    ->     on tmp.day=r.day
    ->     group by type
    ->
    ->     union
    -> select
    ->     type,
    ->     sum(if(tmp.day = 20120101, loginCount, 0)) as '20120101',
    ->     sum(if(tmp.day = 20120102, loginCount, 0)) as '20120102',
    ->     sum(if(tmp.day = 20120103, loginCount, 0)) as '20120103'
    -> from
    ->     (
    ->     select day
    ->     from date
    ->     where day between 20120101 and 20120103
    ->     )tmp
    ->     left join
    ->     (
    ->     select
    ->     day,
    ->     "loginCount" as type,
    ->     loginCount
    ->     from login
    ->     )l
    ->     on tmp.day=l.day
    ->     group by type;
+---------------+----------+----------+----------+
| type          | 20120101 | 20120102 | 20120103 |
+---------------+----------+----------+----------+
| registerCount |        1 |        2 |        3 |
| loginCount    |        4 |        5 |        6 |
+---------------+----------+----------+----------+
2 rows in set (0.00 sec)

mysql>

------解决方案--------------------

在EXCEL中最简单
SQL语句：
你的SQL存为VIEW1
SELECT Sum(if(day = 20120101, registerCount, 0)) as '20120101',
sum(if(day = 20120102, registerCount, 0)) as '20120102',
sum(if(day = 20120103, registerCount, 0)) as '20120103'
FROM (SELECT registerCount FROM VIEW1) A
UNION ALL
SELECT Sum(if(day = 20120101, loginCount, 0)) as '20120101',
sum(if(day = 20120102, loginCount, 0)) as '20120102',
sum(if(day = 20120103, loginCount, 0)) as '20120103'
FROM (SELECT loginCount FROM VIEW1) A

------解决方案--------------------
http://blog.csdn.net/acmain_chm/article/details/4283943
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