Php SQL SERVER计数和联接

大家好，我在sql server中进行查询时遇到问题

我有3个表：测试用例、执行和执行错误：

测试用例

处决

执行错误

我需要知道定义了多少测试用例，执行了多少，有多少测试用例有bug，有多少没有bug

我在寻找一个能给出这种结果的查询：

testcases_n | executed | with_bugs | without_bugs | bugs_amount
---------------------------------------------------------------
2           | 2        | 1         | 1            | 2

考虑到表格结构，这可能吗

---

谢谢

你的意思是这样的：

declare @testcases as table ( id int, name varchar(16) )
insert into @testcases ( id, name ) values
  ( 1, 'login' ), ( 2, 'Logout' )

declare @executions as table ( id int, testcase_id int )
insert into @executions ( id, testcase_id ) values
  ( 1, 1 ), ( 2, 2 ), ( 3, 1 )

declare @execution_bugs as table ( execution_id int, bug_id varchar(16) )
insert into @execution_bugs ( execution_id, bug_id ) values
  ( 1, 'B-1' ), ( 3, 'B-2' )

select
  ( select count(42) from @testcases ) as testcases_n,
  ( select count(distinct testcase_id) from @executions ) as executed,
  ( select count(distinct e.testcase_id) from @executions as e inner join @execution_bugs as eb on eb.execution_id = e.id ) as with_bugs,
  ( select count(42) from @testcases ) - ( select count(distinct e.testcase_id) from @executions as e inner join @execution_bugs as eb on eb.execution_id = e.id ) as without_bugs,
  ( select count(42) from @execution_bugs ) as bugs_amount

---

我没有考虑使用子查询，因为我需要使用where语句过滤记录。但让我试试这个，我告诉你是怎么回事。非常感谢你！另外，我正在使用PHP和SQL Server—我知道这很奇怪—所以我需要简化查询。嗯，count（42）的作用是什么？count（*）之间有什么区别？@hagensoft-

count（*）

和

count（42）

返回相同的结果。对于那些坚持使用

选择
而从不使用
*
的人来说，这是一种平静。使用常量表明我考虑了所需的结果，不希望特定列的非NULL值计数。选择
42
仅仅是因为它是。
execution_id | bug_id
----------------------
1            | B-1
3            | B-2

testcases_n | executed | with_bugs | without_bugs | bugs_amount
---------------------------------------------------------------
2           | 2        | 1         | 1            | 2

declare @testcases as table ( id int, name varchar(16) )
insert into @testcases ( id, name ) values
  ( 1, 'login' ), ( 2, 'Logout' )

declare @executions as table ( id int, testcase_id int )
insert into @executions ( id, testcase_id ) values
  ( 1, 1 ), ( 2, 2 ), ( 3, 1 )

declare @execution_bugs as table ( execution_id int, bug_id varchar(16) )
insert into @execution_bugs ( execution_id, bug_id ) values
  ( 1, 'B-1' ), ( 3, 'B-2' )

select
  ( select count(42) from @testcases ) as testcases_n,
  ( select count(distinct testcase_id) from @executions ) as executed,
  ( select count(distinct e.testcase_id) from @executions as e inner join @execution_bugs as eb on eb.execution_id = e.id ) as with_bugs,
  ( select count(42) from @testcases ) - ( select count(distinct e.testcase_id) from @executions as e inner join @execution_bugs as eb on eb.execution_id = e.id ) as without_bugs,
  ( select count(42) from @execution_bugs ) as bugs_amount