回答編集履歴
3
追記
test
CHANGED
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@@ -37,6 +37,26 @@
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37
37
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※UPDATE構文でのset では、a1.tsubo=a2.tsuboのように、左辺にa1.などの修飾はできません。
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38
38
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39
39
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別パターン
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40
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+
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41
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+
```SQL
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42
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+
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43
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+
update table_a a1
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44
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+
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45
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set tsubo=(
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46
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+
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47
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select tsubo from table_a
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48
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49
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+
where (store, revision)=(
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50
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+
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51
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select a1.store, max(revision) from table_a where store=a1.store
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52
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+
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53
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+
)
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54
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+
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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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where tsubo is null
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58
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+
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59
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+
```
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40
60
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41
61
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```SQL
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42
62
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2
追記
test
CHANGED
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@@ -28,13 +28,37 @@
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28
28
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29
29
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) a2
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30
30
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31
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-
where a1.store=a2.store
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31
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+
where a1.tsubo is null and a1.store=a2.store
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32
32
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33
33
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```
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34
34
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35
35
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となります。
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36
36
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37
37
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※UPDATE構文でのset では、a1.tsubo=a2.tsuboのように、左辺にa1.などの修飾はできません。
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38
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+
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39
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+
別パターン
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40
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+
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41
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```SQL
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42
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+
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43
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update table_a a1
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44
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45
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set tsubo=(
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46
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47
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select tsubo from table_a
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48
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49
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where store=a1.store
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50
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+
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51
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and revision=(
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52
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53
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select max(revision) from table_a where store=a1.store
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54
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+
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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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where tsubo is null
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60
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+
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61
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```
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38
62
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39
63
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```DATA
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40
64
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1
追記
test
CHANGED
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@@ -35,3 +35,53 @@
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35
35
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となります。
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36
36
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37
37
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※UPDATE構文でのset では、a1.tsubo=a2.tsuboのように、左辺にa1.などの修飾はできません。
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38
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+
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39
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+
```DATA
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40
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+
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41
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CREATE TABLE table_a
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42
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43
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(store varchar, revision int, deposit int, tsubo int)
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44
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45
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;
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46
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47
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48
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49
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INSERT INTO table_a
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50
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51
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(store, revision, deposit, tsubo)
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52
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53
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VALUES
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54
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+
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55
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+
('UDON', 1, 4143600, Null),
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56
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+
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57
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+
('UDON', 2, 4143600, Null),
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58
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+
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59
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('UDON', 3, 4143600, Null),
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60
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+
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61
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+
('UDON', 4, 4143600, 180000),
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62
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+
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63
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+
('Mac', 1, 2152400, Null),
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64
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+
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65
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('Mac', 2, 2152400, Null),
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66
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+
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67
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+
('Mac', 3, 2152400, Null),
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68
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+
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69
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+
('Mac', 4, 2152400, Null),
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70
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+
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71
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+
('Mac', 5, 2152400, Null),
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72
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+
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73
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('Mac', 6, 2152400, 250000),
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74
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+
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75
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('TENPURA', 1, 1234500, Null),
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76
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+
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77
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('TENPURA', 2, 1234500, Null),
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78
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+
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79
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('TENPURA', 3, 1234500, Null),
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80
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+
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81
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+
('TENPURA', 4, 1234500, Null),
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82
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+
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83
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('TENPURA', 5, 1234500, 120000)
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84
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+
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85
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+
;
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86
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+
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87
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+
```
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