回答編集履歴
2
追記
answer
CHANGED
|
@@ -12,4 +12,37 @@
|
|
|
12
12
|
left JOIN HOLIDAY h3
|
|
13
13
|
ON h3.holiday_code='3000'
|
|
14
14
|
and p.person_code = h3.person_code
|
|
15
|
+
```
|
|
16
|
+
上記をイメージし易いような別な記述にすると、
|
|
17
|
+
```SQL
|
|
18
|
+
SELECT p.person_name
|
|
19
|
+
, h1.used_date 代休, h2.used_date 有給, h3.used_date 怪我病欠
|
|
20
|
+
FROM PERSON p
|
|
21
|
+
left JOIN (
|
|
22
|
+
select * from HOLIDAY where holiday_code='1000'
|
|
23
|
+
) h1
|
|
24
|
+
ON p.person_code = h1.person_code
|
|
25
|
+
left JOIN (
|
|
26
|
+
select * from HOLIDAY where holiday_code='2000'
|
|
27
|
+
) h2
|
|
28
|
+
ON p.person_code = h2.person_code
|
|
29
|
+
left JOIN (
|
|
30
|
+
select * from HOLIDAY where holiday_code='3000'
|
|
31
|
+
) h3
|
|
32
|
+
ON p.person_code = h3.person_code
|
|
33
|
+
```
|
|
34
|
+
where条件で指定しようとすると、
|
|
35
|
+
```SQL
|
|
36
|
+
SELECT p.person_name
|
|
37
|
+
, h1.used_date 代休, h2.used_date 有給, h3.used_date 怪我病欠
|
|
38
|
+
FROM PERSON p
|
|
39
|
+
left JOIN HOLIDAY h1
|
|
40
|
+
ON p.person_code = h1.person_code
|
|
41
|
+
left JOIN HOLIDAY h2
|
|
42
|
+
ON p.person_code = h2.person_code
|
|
43
|
+
left JOIN HOLIDAY h3
|
|
44
|
+
ON p.person_code = h3.person_code
|
|
45
|
+
where (h1.holiday_code='1000' or h1.holiday_code is null)
|
|
46
|
+
and (h2.holiday_code='2000' or h2.holiday_code is null)
|
|
47
|
+
and (h3.holiday_code='3000' or h3.holiday_code is null)
|
|
15
48
|
```
|
1
訂正
answer
CHANGED
|
@@ -7,9 +7,9 @@
|
|
|
7
7
|
ON h1.holiday_code='1000'
|
|
8
8
|
and p.person_code = h1.person_code
|
|
9
9
|
left JOIN HOLIDAY h2
|
|
10
|
-
ON
|
|
10
|
+
ON h2.holiday_code='2000'
|
|
11
11
|
and p.person_code = h2.person_code
|
|
12
12
|
left JOIN HOLIDAY h3
|
|
13
|
-
ON
|
|
13
|
+
ON h3.holiday_code='3000'
|
|
14
14
|
and p.person_code = h3.person_code
|
|
15
15
|
```
|