sql多次计数答案

【问题标题】：sql multiple countssql多次计数
【发布时间】：2019-12-19 19:43:59
【问题描述】：

我有两个执行计数的查询。一个是总计数，下一个是通过的测试用例的总计数。

我想为此编写一个查询（有一个结果集）。我怎么可能返回一个返回以下内容的表

|Release Name| Total Count | Passed


SELECT
REL.REL_NAME as "Release Name",
count(REL.REL_NAME) as "Total Count"
FROM TEST TST
INNER JOIN TESTCYCL TCY ON TST.TS_TEST_ID = TCY.TC_TEST_ID
INNER JOIN CYCLE CYC ON TCY.TC_CYCLE_ID = CYC.CY_CYCLE_ID
INNER JOIN RELEASE_CYCLES RCY ON CYC.CY_ASSIGN_RCYC = RCY.RCYC_ID
INNER JOIN RELEASES REL ON REL.REL_ID = RCY.RCYC_PARENT_ID
GROUP BY REL.REL_NAME
ORDER BY REL.REL_NAME

SELECT
REL.REL_NAME as "Release Name",
count(REL.REL_NAME) as "Passed"
FROM TEST TST
INNER JOIN TESTCYCL TCY ON TST.TS_TEST_ID = TCY.TC_TEST_ID
INNER JOIN CYCLE CYC ON TCY.TC_CYCLE_ID = CYC.CY_CYCLE_ID
INNER JOIN RELEASE_CYCLES RCY ON CYC.CY_ASSIGN_RCYC = RCY.RCYC_ID
INNER JOIN RELEASES REL ON REL.REL_ID = RCY.RCYC_PARENT_ID
WHERE TC_STATUS = 'Passed'
GROUP BY REL.REL_NAME
ORDER BY REL.REL_NAME`

【问题讨论】：

标签： sql count

【解决方案1】：

这会给你两个结果：

SELECT
REL.REL_NAME as "Release Name",
count(REL.REL_NAME) as "Total Count"
sum(case when TC_STATUS = 'Passed' then 1 else 0 end) as "Passed"
FROM TEST TST
INNER JOIN TESTCYCL TCY ON TST.TS_TEST_ID = TCY.TC_TEST_ID
INNER JOIN CYCLE CYC ON TCY.TC_CYCLE_ID = CYC.CY_CYCLE_ID
INNER JOIN RELEASE_CYCLES RCY ON CYC.CY_ASSIGN_RCYC = RCY.RCYC_ID
INNER JOIN RELEASES REL ON REL.REL_ID = RCY.RCYC_PARENT_ID

GROUP BY REL.REL_NAME
ORDER BY REL.REL_NAME`

【讨论】：

【解决方案2】：

使用条件聚合：

SELECT
REL.REL_NAME as "Release Name",
COUNT(REL.REL_NAME) as "Total Count",
COUNT(CASE WHEN TC_STATUS = 'Passed' THEN REL.REL_NAME END) as "Passed"
FROM TEST TST
INNER JOIN TESTCYCL TCY ON TST.TS_TEST_ID = TCY.TC_TEST_ID
INNER JOIN CYCLE CYC ON TCY.TC_CYCLE_ID = CYC.CY_CYCLE_ID
INNER JOIN RELEASE_CYCLES RCY ON CYC.CY_ASSIGN_RCYC = RCY.RCYC_ID
INNER JOIN RELEASES REL ON REL.REL_ID = RCY.RCYC_PARENT_ID
GROUP BY REL.REL_NAME
ORDER BY REL.REL_NAME

【讨论】：

【解决方案3】：

不确定您是否正在寻找类似的东西..

--样本表--

create table rel
(
tst_id int,
Release_Name varchar(50)
);


insert into rel values
(1,'Jan_Release'),
(2,'Feb_Release'),
(3,'Mar_Release'),
(2,'Mar_Release'),
(1,'Feb_Release');

create table tst
(
tst_id int,
tc_status varchar(50)
);

insert into tst values
(1,'Pass'),
(2,'Fail'),
(3,'Pass');

--样本数据--

--使用的查询--

select 
rel.Release_Name,
count(rel.Release_Name) as Total_Count,
sum(case when tst.tc_status = 'Pass' then 1 else 0 end) as "Passed"
from rel
inner join tst on rel.tst_id=tst.tst_id
group by rel.release_name
order by rel.release_name;

--结果集--

【讨论】：