回答編集履歴
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追記
test
CHANGED
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@@ -61,3 +61,71 @@
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61
61
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62
62
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63
63
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```
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64
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65
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66
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67
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# 追記
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68
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69
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UNIONでちがうカラム名のものを結合する場合、1行目のselectのカラム名が優先されます。
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70
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+
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71
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必要に応じて適当なエイリアスを振ってあげるとわかりやすくなるでしょう
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72
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73
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```SQL
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74
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75
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create table tbl1(ID varchar(10),Number1 int);
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76
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insert into tbl1 values
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78
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79
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('田中',1),
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80
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81
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('高橋',2),
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82
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83
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('高橋',4),
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84
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85
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('斉藤',1),
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86
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('斉藤',3),
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88
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('斉藤',3),
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90
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('斉藤',12);
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93
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94
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95
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create table tbl2(ID varchar(10),Number2 int);
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96
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insert into tbl2 values
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98
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('田中',3),
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100
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101
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('林',2),
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102
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103
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('林',12),
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('林',12);
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106
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107
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108
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select ID
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,sum(case Number when 1 then 1 else 0 end) as countOf_1
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114
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115
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,sum(case Number when 2 then 1 else 0 end) as countOf_2
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116
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,sum(case Number when 3 then 1 else 0 end) as countOf_3
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118
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,sum(case Number when 12 then 1 else 0 end) as countOf_4
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120
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from(
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select ID,Number1 as Number from tbl1 where Number1 in (1,2,3)
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124
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125
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union all select ID,Number2 from tbl2 where Number2 =12
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126
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) as t1
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128
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129
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group by ID;
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130
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```
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