0

我有一个名为 tbl_populations 的表，其中包含以下字段：

pk_populationid,residence,value,aspect,gender,fk_tbl_states_stateid

我正在尝试计算两个方面的行差异

例如

SELECT fk_tbl_states_stateid, value - (
SELECT value
FROM tbl_populations
WHERE fk_tbl_states_stateid = '16'
AND fk_tbl_districts_districtid = '0'
AND residence = '0'
AND gender = '0'
AND aspect = '2' ) AS difference
FROM tbl_populations
WHERE fk_tbl_states_stateid = '16'
AND fk_tbl_districts_districtid = '0'
AND residence = '0'
AND gender = '0'
AND aspect = '1'

它工作正常，因为它返回一行

为了获取我想要检索所有性别值的多个数据，我已从条件中删除了性别。

SELECT fk_tbl_states_stateid,gender, value - (
SELECT value
FROM tbl_populations
WHERE fk_tbl_states_stateid = '16'
AND fk_tbl_districts_districtid = '0'
AND residence = '0'
AND aspect = '2' ) AS difference
FROM tbl_populations
WHERE fk_tbl_states_stateid = '16'
AND fk_tbl_districts_districtid = '0'
AND residence = '0'
AND aspect = '1'

我收到Subquery returns more than 1 row错误。

我怎样才能得到所有的结果？

4

2 回答 2

1 
SELECT Table11.fk_tbl_states_stateid,Table1.Gender,Table1.value - table2.Value as Diff
From
(SELECT *
FROM tbl_populations
WHERE fk_tbl_states_stateid = '16'
AND fk_tbl_districts_districtid = '0'
AND residence = '0'
AND aspect = '2' ) Table1,
(SELECT value,Gender
FROM tbl_populations
WHERE fk_tbl_states_stateid = '16'
AND fk_tbl_districts_districtid = '0'
AND residence = '0'
AND aspect = '1' ) Table2
Where Table1.Gender = Table2.Gender
于 2012-05-14T06:42:59.763 回答
0

为它使用一个函数，这样应该很容易

于 2012-05-14T06:39:17.990 回答