回答編集履歴
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追記
answer
CHANGED
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@@ -40,4 +40,64 @@
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40
40
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,if(isnull(q1),1,count(*)/(select count(*) from `check` as t2 where t1.name=t2.name)) as ratio
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41
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from `check` as t1 group by name,q1 with rollup
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42
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having name='aaaa' and q1='y'
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43
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```
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44
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# 追記
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45
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- なんか変なので書き直し
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46
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47
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```SQL
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48
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select name,q,yn,count(*) as count
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49
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,count(*)/(select count(*) from `check` as t2 where t1.name=t2.name) as ratio
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50
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from (
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51
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select name,'q1' as q,q1 as yn from `check`
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52
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union all select name,'q2',q2 from `check`
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53
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union all select name,'q3',q3 from `check`
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54
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union all select name,'q4',q4 from `check`
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) as t1
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56
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group by name,q,yn
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57
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```
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58
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59
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- 上記集計して
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60
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```SQL
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61
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select name
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62
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,yn
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63
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,sum((q='q1')* ratio) as q1
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64
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,sum((q='q2')* ratio) as q2
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65
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,sum((q='q3')* ratio) as q3
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66
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,sum((q='q4')* ratio) as q4
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67
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from(
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68
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select name,q,yn,count(*) as count
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69
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,count(*)/(select count(*) from `check` as t2 where t1.name=t2.name) as ratio
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70
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from (
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71
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select name,'q1' as q,q1 as yn from `check`
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72
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union all select name,'q2',q2 from `check`
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73
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union all select name,'q3',q3 from `check`
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union all select name,'q4',q4 from `check`
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) as t1
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group by name,q,yn
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) as t3
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78
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group by name,yn
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```
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80
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81
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- havingで条件をつけて抽出
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82
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```SQL
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83
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select name
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84
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,yn
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,sum((q='q1')* ratio) as q1
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86
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,sum((q='q2')* ratio) as q2
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87
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,sum((q='q3')* ratio) as q3
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,sum((q='q4')* ratio) as q4
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from(
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90
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select name,q,yn,count(*) as count
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91
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,count(*)/(select count(*) from `check` as t2 where t1.name=t2.name) as ratio
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92
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from (
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93
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select name,'q1' as q,q1 as yn from `check`
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94
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union all select name,'q2',q2 from `check`
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95
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union all select name,'q3',q3 from `check`
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96
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union all select name,'q4',q4 from `check`
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97
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) as t1
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98
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group by name,q,yn
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99
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) as t3
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100
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group by name,yn
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101
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having name='aaaa' and yn='y'
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102
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43
103
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```
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