回答編集履歴
2
コード修正
test
CHANGED
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@@ -44,6 +44,8 @@
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44
44
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45
45
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GROUP BY cls.class
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46
46
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47
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+
ORDER BY cls.class
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48
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+
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47
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) AS jsn
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48
50
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49
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```
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1
コード修正
test
CHANGED
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@@ -1,6 +1,6 @@
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1
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-
こういうのあまりSQLは得意では無いと思いますが、次のような
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1
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+
こういうのあまりSQLは得意では無いと思いますが、次のような形で一応動作するように思います。
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2
2
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3
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-
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3
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+
※[paiza](https://paiza.io/)で動作確認済み
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4
4
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5
5
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```SQL
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6
6
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@@ -18,31 +18,31 @@
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18
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21
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-
SELECT CONCAT('{',GROUP_CONCAT(jsn.
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SELECT CONCAT('{',GROUP_CONCAT(jsn.itm SEPARATOR ','),'}') AS json
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22
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FROM (
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-
SELECT CONCAT(class, ':[', GROUP_CONCAT(
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SELECT CONCAT(class, ':[', GROUP_CONCAT(cls.itm SEPARATOR ','), ']') AS itm
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FROM (
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SELECT class, CONCAT('{', GROUP_CONCAT(dat.
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SELECT class, CONCAT('{', GROUP_CONCAT(dat.itm SEPARATOR ','), '}') AS itm
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FROM (
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SELECT class, id, CONCAT('id:',id,',studentnum:',studentnum) AS
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SELECT class, id, CONCAT('id:',id,',studentnum:',studentnum) AS itm
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FROM tbl
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) AS dat
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39
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-
GROUP BY class, id
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39
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+
GROUP BY dat.class, dat.id
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41
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-
ORDER BY id
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+
ORDER BY dat.id
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42
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43
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-
) AS
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43
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) AS cls
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44
44
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45
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-
GROUP BY class
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45
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+
GROUP BY cls.class
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46
46
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47
47
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) AS jsn
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48
48
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