在MySQL数据库上操作字符串
我有以下字符串:在MySQL数据库上操作字符串,mysql,string,manipulate,Mysql,String,Manipulate,我有以下字符串:X322-1-381128和X322-1-383128 我需要操纵这些字符串以获取输出: X322138128和X322138328 我尝试了这个解决方案,但很成功,因为输出结果只有:X322138128 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,
X322-1-381128
和X322-1-383128
我需要操纵这些字符串以获取输出:
X322138128
和X322138328
我尝试了这个解决方案,但很成功,因为输出结果只有:X322138128
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
使用
替换('X322-1-381128','-')看起来您的最后一个子字符串是错误的。要删除所有
-
和最后第三个数字:
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;
由于字符串操作非常静态,因此也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))
选择替换('X322-1-381128','-','')感谢您的回复,但输出必须包含10个字符,而输入是11个字符,仅替换是不够的