質問編集履歴
4
画像差し替え
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こちらの画像に質問をまとめさせていただきました。
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画像の差し替え、誤字訂正
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※Or
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※Orlofsky様からご指摘を受け、上記SQL fiddleのコードを下記に掲載させて頂きます。
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```SQL
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2
SQL fiddleのコードを質問本文に掲載
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※Oriofsky様からご指摘を受け、上記SQL fiddleのコードを下記に掲載させて頂きます。
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```SQL
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52
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53
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# main_datas の作成
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54
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+
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55
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CREATE TABLE main_datas
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56
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57
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(`main_id` int, `unique_name` varchar(5), `nick_name` varchar(2))
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58
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+
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59
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;
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60
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+
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INSERT INTO main_datas
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(`main_id`, `unique_name`, `nick_name`)
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64
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65
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VALUES
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66
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67
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(1, 'one', '一郎'),
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68
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69
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(2, 'two', '次郎'),
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70
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(3, 'three', '三郎')
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;
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75
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77
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# sub_datas の作成
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CREATE TABLE sub_datas
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(`sub_id` int, `user_id` int, `sub_key` varchar(7), `sub_val` varchar(3))
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;
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INSERT INTO sub_datas
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(`sub_id`, `user_id`, `sub_key`, `sub_val`)
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VALUES
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90
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91
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(1, 1, 'age', '10歳'),
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92
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(2, 1, 'address', '東京'),
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94
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95
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(3, 2, 'age', '20歳'),
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96
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(4, 2, 'address', '神奈川'),
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98
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(5, 3, 'age', '30歳'),
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(6, 3, 'address', '千葉')
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;
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105
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# action_datas の作成
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CREATE TABLE action_datas
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110
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(`action_id` int, `action_name` varchar(8), `action_date` varchar(4), `actor_id` int, `target_id` int, `target_type` varchar(6))
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112
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+
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113
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;
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114
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+
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115
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INSERT INTO action_datas
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116
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+
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117
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(`action_id`, `action_name`, `action_date`, `actor_id`, `target_id`, `target_type`)
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118
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119
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VALUES
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120
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121
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(1, 'follow', '1月1日', 1, 2, 'user'),
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122
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123
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(2, 'follow', '2月2日', 1, 20, 'thread'),
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125
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(3, 'follow', '3月3日', 2, 20, 'thread'),
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126
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127
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(4, 'favorite', '4月4日', 3, 2, 'user'),
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128
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129
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(5, 'follow', '5月5日', 3, 20, 'thread'),
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130
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131
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(6, 'favorite', '6月6日', 1, 3, 'user')
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132
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+
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133
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;
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134
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+
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135
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+
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136
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+
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137
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```
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138
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+
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49
139
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50
140
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51
141
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### 試したこと
|
1
コード訂正
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -86,7 +86,23 @@
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86
86
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87
87
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# ➃のテーブル
|
|
88
88
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89
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-
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89
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+
SELECT
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90
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+
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91
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+
m.main_id,
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92
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+
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93
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+
m.unique_name AS unique_name,
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94
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+
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95
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m.nick_name AS nick_name,
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96
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+
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97
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(select sub_val from sub_datas where user_id = m.main_id and sub_key = 'age' ) as age,
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98
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+
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99
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+
(select sub_val from sub_datas where user_id = m.main_id and sub_key = 'address' ) as address,
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100
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+
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101
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+
(select action_date from followers where actor_id = u.ID ) as follow_date,
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102
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+
|
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103
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+
(select action_date from followers where actor_id = u.ID ) as favorite_date,
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104
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+
|
|
105
|
+
FROM main_datas m;
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90
106
|
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91
107
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92
108
|
|