基于W_number的sql列移位

Question

输入：

输出：

我想写一个通用的mysql查询，它可以将输入表转换为输出表 基本上值是根据 w_number 进行转移的

这些表只是示例，我需要一个可以将列最多移动 60 的查询。

我尝试构建一些逻辑以获得这样的查询，这似乎有效

    SELECT 
        w_number,
        CASE WHEN w_number = 1 THEN value_1
             WHEN w_number > 1 AND w_number <= 7 THEN 
                CASE WHEN w_number = 2 THEN value_7
                     WHEN w_number = 3 THEN value_6
                     WHEN w_number = 4 THEN value_5
                     WHEN w_number = 5 THEN value_4
                     WHEN w_number = 6 THEN value_3
                     WHEN w_number = 7 THEN value_2
                     ELSE NULL END
             ELSE NULL END AS value_1,
        CASE WHEN w_number = 1 THEN value_2
             WHEN w_number > 1 AND w_number <= 7 THEN 
                CASE WHEN w_number = 2 THEN value_1
                     WHEN w_number = 3 THEN value_7
                     WHEN w_number = 4 THEN value_6
                     WHEN w_number = 5 THEN value_5
                     WHEN w_number = 6 THEN value_4
                     WHEN w_number = 7 THEN value_3
                     ELSE NULL END
             ELSE NULL END AS value_2,
        CASE WHEN w_number = 1 THEN value_3
             WHEN w_number > 1 AND w_number <= 7 THEN 
                CASE WHEN w_number = 2 THEN value_2
                     WHEN w_number = 3 THEN value_1
                     WHEN w_number = 4 THEN value_7
                     WHEN w_number = 5 THEN value_6
                     WHEN w_number = 6 THEN value_5
                     WHEN w_number = 7 THEN value_4
                     ELSE NULL END
             ELSE NULL END AS value_3,
        CASE WHEN w_number = 1 THEN value_4
             WHEN w_number > 1 AND w_number <= 7 THEN 
                CASE WHEN w_number = 2 THEN value_3
                     WHEN w_number = 3 THEN value_2
                     WHEN w_number = 4 THEN value_1
                     WHEN w_number = 5 THEN value_7
                     WHEN w_number = 6 THEN value_6
                     WHEN w_number = 7 THEN value_5
                     ELSE NULL END
             ELSE NULL END AS value_4,
        CASE WHEN w_number = 1 THEN value_5
             WHEN w_number > 1 AND w_number <= 7 THEN 
                CASE WHEN w_number = 2 THEN value_4
                     WHEN w_number = 3 THEN value_3
                     WHEN w_number = 4 THEN value_2
                     WHEN w_number = 5 THEN value_1
                     WHEN w_number = 6 THEN value_7
                     WHEN w_number = 7 THEN value_6
                     ELSE NULL END
             ELSE NULL END AS value_5,
        CASE WHEN w_number = 1 THEN value_6
             WHEN w_number > 1 AND w_number <= 7 THEN 
                CASE WHEN w_number = 2 THEN value_5
                     WHEN w_number = 3 THEN value_4
                     WHEN w_number = 4 THEN value_3
                     WHEN w_number = 5 THEN value_2
                     WHEN w_number = 6 THEN value_1
                     WHEN w_number = 7 THEN value_7
                     ELSE NULL END
             ELSE NULL END AS value_6,
        CASE WHEN w_number = 1 THEN value_7
             ELSE NULL END AS value_7
    FROM your_table_name
    ORDER BY w_number;

Answer 1

参见示例

select *
  ,JSON_EXTRACT(ar,concat('$[',(7-idx+0)%7,']'))value_1
  ,JSON_EXTRACT(ar,concat('$[',(7-idx+1)%7,']'))value_2
  ,JSON_EXTRACT(ar,concat('$[',(7-idx+2)%7,']'))value_3
  ,JSON_EXTRACT(ar,concat('$[',(7-idx+3)%7,']'))value_4
  ,JSON_EXTRACT(ar,concat('$[',(7-idx+4)%7,']'))value_5
  ,JSON_EXTRACT(ar,concat('$[',(7-idx+5)%7,']'))value_6
  ,JSON_EXTRACT(ar,concat('$[',(7-idx+6)%7,']'))value_7
--  ,(7-idx+0)%7 i1,(7-idx+1)%7 i2,(7-idx+2)%7 i3,(7-idx+3)%7 i4,(7-idx+4)%7 i5
--  ,(7-idx+5)%7 i6,(7-idx+6)%7 i7
from(
select id,w_number,json_array(value_1,value_2,value_3,value_4,value_5,value_6,value_7) ar
  ,w_number-1 idx
from test
)jsa

输出是

id	w_number	ar	idx	值_1	值_2	值_3	值_4	值_5	值_6	值_7
1	5	[10, 20, 空, 空, 空, 空, 空]	4	空	空	空	空	10	20	空
2	4	[空、50、60、70、空、空、空]	3	空	空	空	空	50	60	70
3	2	[空，90，空，110，空，空，空]	1	空	空	90	空	110	空	空
4	2	[空、空、30、40、空、空、空]	1	空	空	空	30	40	空	空
5	1	[50,60,70,90,空,空,空]	0	50	60	70	90	空	空	空
6	3	[90, 100, 110, 120, 空, 空, 空]	2	空	空	90	100	110	120	空
7	5	[空、50、60、70、空、空、空]	4	70	空	空	空	空	50	60
8	1	[1,2,3,4,5,6,7]	0	1	2	3	4	5	6	7
9	2	[1,2,3,4,5,6,7]	1	7	1	2	3	4	5	6
10	3	[1,2,3,4,5,6,7]	2	6	7	1	2	3	4	5
11	4	[1,2,3,4,5,6,7]	3	5	6	7	1	2	3	4
12	5	[1,2,3,4,5,6,7]	4	4	5	6	7	1	2	3
13	6	[1,2,3,4,5,6,7]	5	3	4	5	6	7	1	2
14	7	[1,2,3,4,5,6,7]	6	2	3	4	5	6	7	1
15	8	[1,2,3,4,5,6,7]	7	1	2	3	4	5	6	7