回答編集履歴
4
追記
test
CHANGED
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@@ -19,3 +19,27 @@
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19
19
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and end_date is not null
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20
20
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21
21
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```
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22
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+
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23
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+
どっちが低コストか分かりませんが、別パターン
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24
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+
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25
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+
```SQL
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26
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+
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27
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+
SELECT m.id, m.name, mi.start_date, mi.end_date
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28
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+
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29
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+
from member_item mi inner join member m
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30
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+
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31
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+
om mi.menber_id = m.id
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32
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+
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33
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+
where (mi.menber_id, mi.start_date) in (
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34
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+
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35
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+
select menber_id, max(start_Date)
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36
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+
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37
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+
from member_item
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38
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+
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39
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+
group by menber_id
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40
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+
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41
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+
)
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42
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+
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43
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+
and end_date is not null
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44
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+
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45
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+
```
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3
推敲
test
CHANGED
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@@ -10,7 +10,9 @@
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10
10
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11
11
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where not exists(
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12
12
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13
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+
select 1 from member_item
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14
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+
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13
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-
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15
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+
where menber_id=mi.menber_id and start_date > mi.start_date
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14
16
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15
17
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)
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16
18
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2
推敲
test
CHANGED
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@@ -2,7 +2,7 @@
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2
2
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3
3
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```SQL
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4
4
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5
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-
se
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5
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+
SELECT m.id, m.name, mi.start_date, mi.end_date
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6
6
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7
7
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from member_item mi inner join member m
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8
8
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1
追記
test
CHANGED
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@@ -4,7 +4,9 @@
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4
4
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5
5
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select *
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6
6
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7
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+
from member_item mi inner join member m
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8
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+
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7
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-
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9
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+
om mi.menber_id = m.id
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8
10
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9
11
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where not exists(
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10
12
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|