回答編集履歴
6
訂正
test
CHANGED
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@@ -28,34 +28,34 @@
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28
28
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29
29
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with rows as (
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30
30
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31
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-
select id2, count(*) cnt
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31
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+
select id2, count(*) cnt from test2
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32
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-
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33
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-
from test2
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34
32
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35
33
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group by id2
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34
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+
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35
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+
), temp as (
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36
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+
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37
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+
select id2 from rows
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38
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+
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39
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+
where cnt = (select max(cnt) from rows)
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36
40
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37
41
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)
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38
42
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39
43
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select *
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40
44
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41
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-
from
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45
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+
from test
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42
46
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43
47
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where (
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44
48
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45
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-
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49
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+
id in (select ID2 from temp) -- レコード数が最大のものがある場合
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46
50
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47
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-
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51
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+
or not exists( -- 同じ値がない場合
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48
52
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49
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-
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53
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+
select 1 from test2 where id2=test.id
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50
54
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51
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-
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55
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+
)
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52
56
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53
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-
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57
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+
)
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54
58
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55
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-
)
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56
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-
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57
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-
)
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58
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-
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59
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-
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59
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+
and (foo = 値1 or id = 値2)
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60
60
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61
61
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```
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5
改良
test
CHANGED
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@@ -28,15 +28,11 @@
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28
28
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29
29
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with rows as (
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30
30
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31
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-
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31
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+
select id2, count(*) cnt, count(*) over() max_cnt
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32
32
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33
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-
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33
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+
from test2
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34
34
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35
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-
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35
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+
group by id2
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36
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-
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37
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-
select id2 from rows
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38
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-
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39
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-
where cnt = (select max(cnt) from rows)
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40
36
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41
37
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)
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42
38
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@@ -46,7 +42,11 @@
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46
42
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47
43
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where (
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48
44
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45
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+
id in ( -- レコード数が最大のもの
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46
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+
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49
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-
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47
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+
select ID2 from rows where cnt=max_cnt
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48
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+
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49
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+
)
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50
50
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51
51
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or not exists( -- 同じ値がない場合
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52
52
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4
推敲
test
CHANGED
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@@ -1,4 +1,4 @@
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1
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-
結果が却って来ないのは、直積の片側が0件なら、結果は0件だからです。
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1
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+
結果が却って来ないのは、直積の片側が0件なら、結果(0との積算)は0件だからです。
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2
2
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3
3
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full join すれば結果は却ります。
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4
4
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3
訂正
test
CHANGED
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@@ -46,7 +46,7 @@
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46
46
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47
47
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where (
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48
48
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49
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-
id
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49
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+
id in (select ID2 from temp) -- レコード数が最大のものがある場合
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50
50
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51
51
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or not exists( -- 同じ値がない場合
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52
52
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2
訂正
test
CHANGED
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@@ -46,11 +46,11 @@
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46
46
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47
47
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where (
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48
48
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49
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-
id = (selct ID2 from temp) -- レコード数が最大のものがある場合
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49
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+
id = (select ID2 from temp) -- レコード数が最大のものがある場合
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50
50
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51
51
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or not exists( -- 同じ値がない場合
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52
52
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53
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-
select 1 from test2 where id2=
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53
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+
select 1 from test2 where id2=test.id
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54
54
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55
55
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)
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56
56
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1
追記
test
CHANGED
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@@ -19,3 +19,43 @@
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19
19
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on temp.id=temp2.id
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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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+
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24
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+
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25
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+
やりたいことがいまいち理解できませんが、組み替えてみました。
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26
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+
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27
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+
```SQL
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|
28
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+
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|
29
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+
with rows as (
|
|
30
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+
|
|
31
|
+
select id2, count(*) cnt from test2
|
|
32
|
+
|
|
33
|
+
group by id2
|
|
34
|
+
|
|
35
|
+
), temp as (
|
|
36
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+
|
|
37
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+
select id2 from rows
|
|
38
|
+
|
|
39
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+
where cnt = (select max(cnt) from rows)
|
|
40
|
+
|
|
41
|
+
)
|
|
42
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+
|
|
43
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+
select *
|
|
44
|
+
|
|
45
|
+
from test
|
|
46
|
+
|
|
47
|
+
where (
|
|
48
|
+
|
|
49
|
+
id = (selct ID2 from temp) -- レコード数が最大のものがある場合
|
|
50
|
+
|
|
51
|
+
or not exists( -- 同じ値がない場合
|
|
52
|
+
|
|
53
|
+
select 1 from test2 where id2=.test.id
|
|
54
|
+
|
|
55
|
+
)
|
|
56
|
+
|
|
57
|
+
)
|
|
58
|
+
|
|
59
|
+
and (foo = 値1 or id = 値2)
|
|
60
|
+
|
|
61
|
+
```
|