合并两个SQL查询的结果

Question

我想将两个查询的结果合并为一个resulttable，其中包含三列，result1，result2和dateday，查询是矛盾的

SELECT COUNT( DISTINCT `cust` ) AS result1, DATE( `date` ) AS dateday
FROM `salg_test`
WHERE `saved` =0
AND `is_void` =0
GROUP BY dateday
ORDER BY dateday DESC

SELECT COUNT( DISTINCT `cust` ) AS result2, DATE( `date` ) AS dateday
FROM `salg_test`
WHERE `saved` =1
AND `is_void` =0
GROUP BY dateday
ORDER BY dateday DESC

我希望两个结果按dateday变量分组并排序。

Answer 1

应该能够做到这样的事情：

SELECT COUNT( DISTINCT CASE `saved` when 0 then `cust` else null end ) AS result1
, COUNT( DISTINCT CASE `saved` when 1 then `cust` else null end ) AS result2
, DATE( `date` ) AS dateday
FROM `salg_test`
WHERE `is_void` =0
GROUP BY dateday
ORDER BY dateday DESC

Answer 2

怎么样：

WHERE (`saved`= 1 OR `saved`= 0)

或者，如果saved的唯一可能值为1或0，则只需从查询中省略该条件。