1

我有这些字符串：X322-1-381128和X322-1-383128

我需要操纵这些字符串以获得输出：

X322138128和X322138328

我试过这个解决方案没有成功，因为输出只有：X322138128

请问你能帮我吗？

mysql> SELECT
    'X322-1-381128' string,
    SUBSTRING_INDEX('X322-1-381128', '-', 1) a,
    SUBSTRING('X322-1-381128', 6, 1) b,
    SUBSTRING('X322-1-381128', 8, 2) c,
    SUBSTRING('X322-1-381128' ,- 3) d,
    CONCAT(
        SUBSTRING_INDEX('X322-1-381128', '-', 1),
        SUBSTRING('X322-1-381128', 6, 1),
        SUBSTRING('X322-1-381128', 8, 2),
        SUBSTRING('X322-1-381128' ,- 3)
    ) output,
    'X322-1-383128' string,
    SUBSTRING_INDEX('X322-1-381128', '-', 1) a,
    SUBSTRING('X322-1-381128', 6, 1) b,
    SUBSTRING('X322-1-381128', 8, 2) c,
    SUBSTRING('X322-1-381128' ,- 3) d,
    CONCAT(
        SUBSTRING_INDEX('X322-1-383128', '-', 1),
        SUBSTRING('X322-1-383128', 6, 1),
        SUBSTRING('X322-1-383128', 8, 2),
        SUBSTRING('X322-1-383128' ,- 3)
    ) output;
+---------------+------+---+----+-----+------------+---------------+------+---+----+-----+------------+
| string        | a    | b | c  | d   | output     | string        | a    | b | c  | d   | output     |
+---------------+------+---+----+-----+------------+---------------+------+---+----+-----+------------+
| X322-1-381128 | X322 | 1 | 38 | 128 | X322138128 | X322-1-383128 | X322 | 1 | 38 | 128 | X322138128 |
+---------------+------+---+----+-----+------------+---------------+------+---+----+-----+------------+
1 row in set
4

2 回答 2

1

使用替换（'X322-1-381128'，'-'）

于 2019-11-19T09:05:14.937 回答
0

看起来你的最后一个SUBSTRING是错误的。您要删除所有-数字和倒数第三个数字：

SELECT
  'X322-1-381128' string,
  SUBSTRING_INDEX('X322-1-381128', '-', 1) a,
  SUBSTRING('X322-1-381128', 6, 1) b,
  SUBSTRING('X322-1-381128', 8, 2) c,
  CONCAT(SUBSTRING('X322-1-381128' ,-4,1), SUBSTRING('X322-1-381128' ,-2)) d,
  CONCAT(
    SUBSTRING_INDEX('X322-1-381128', '-', 1),
    SUBSTRING('X322-1-381128', 6, 1),
    SUBSTRING('X322-1-381128', 8, 2),
    SUBSTRING('X322-1-381128' ,- 3)
  ) output,

  'X322-1-383128' string,
  SUBSTRING_INDEX('X322-1-383128', '-', 1) a,
  SUBSTRING('X322-1-383128', 6, 1) b,
  SUBSTRING('X322-1-383128', 8, 2) c,
  CONCAT(SUBSTRING('X322-1-383128' ,-4,1), SUBSTRING('X322-1-383128' ,-2)) d,
  CONCAT(
    SUBSTRING_INDEX('X322-1-383128', '-', 1),
    SUBSTRING('X322-1-383128', 6, 1),
    SUBSTRING('X322-1-383128', 8, 2),
    SUBSTRING('X322-1-383128' ,-4,1),
    SUBSTRING('X322-1-383128' ,-2)
  ) output;

由于您的字符串操作非常静态，您还可以使用以下更简单的解决方案：

SELECT 'X322-1-381128' string,
  CONCAT(LEFT(REPLACE('X322-1-381128', '-', ''), 8), RIGHT(REPLACE('X322-1-381128', '-', ''), 2))
UNION ALL
SELECT 'X322-1-383128' string,
  CONCAT(LEFT(REPLACE('X322-1-383128', '-', ''), 8), RIGHT(REPLACE('X322-1-383128', '-', ''), 2))

dbfiddle.uk 上的演示

于 2019-11-19T09:09:56.273 回答