我想在SQL中分几行分成几行。
例如,我有'A ADCT DROP INCALL - ',它包含空格和' - ',我希望例如在几行中值保持分开。
原始结果:
SELECT statuses FROM campaigns;
+-----------------------------------------+
| RESULT OF QUERY |
+-----------------------------------------+
| A ADCT DROP INCALL - |
+-----------------------------------------+
结果必须如下:
+-----------------------------------------+
| RESULT OF QUERY |
+-----------------------------------------+
| A |
| ADCT |
| DROP |
| INCALL |
+-----------------------------------------+
我尝试使用SUBSTRING_INDEX:
SELECT status
FROM statuses
WHERE statuses.status NOT IN (SELECT SUBSTRING_INDEX(TRIM(dial_statuses)," ", 1) FROM campaigns WHERE campaign_id = '4000')
ORDER BY STATUS;
对不起,我知道那是基本的。
我相信你可以这样做:
SELECT
tablename.id,
SUBSTRING_INDEX(SUBSTRING_INDEX(tablename.name, ',', numbers.n), ',', -1)
name
FROM
numbers
INNER JOIN tablename ON CHAR_LENGTH(tablename.name)
-CHAR_LENGTH(REPLACE(tablename.name, ',', ''))>=numbers.n-1
ORDER BY
id, n
请参阅小提琴here。
如果您无法创建表,那么解决方案可以是:
SELECT
tablename.id,
SUBSTRING_INDEX(SUBSTRING_INDEX(tablename.name, ',', numbers.n), ',', -1)
name
FROM
(select 1 n union all
select 2 union all select 3 union all
select 4 union all select 5) numbers
INNER JOIN tablename ON CHAR_LENGTH(tablename.name)
-CHAR_LENGTH(REPLACE(tablename.name, ',', ''))>=numbers.n-1
ORDER BY
id, n
一个例子小提琴是here。
您可以尝试在MySQL中创建函数,如下所示:
CREATE FUNCTION SPLIT_STR(
x VARCHAR(255),
delim VARCHAR(12),
pos INT
)
RETURNS VARCHAR(255)
RETURN REPLACE(SUBSTRING(SUBSTRING_INDEX(x, delim, pos),
LENGTH(SUBSTRING_INDEX(x, delim, pos -1)) + 1),
delim, '');
然后你应该能够在查询中使用它:
SELECT SPLIT_STR('a|bb|ccc|dd', '|', 3) as third;
这是未经测试但应该有效。有关更多信息,请查看this。
如果我正确读到这个,那么这个问题已经被问到here:
SQL split values to multiple rows
答案从@fthiella说明如下:
select
tablename.id,
SUBSTRING_INDEX(SUBSTRING_INDEX(tablename.name, ',', numbers.n), ',', -1) name
from
(select 1 n union all
select 2 union all select 3 union all
select 4 union all select 5) numbers INNER JOIN tablename
on CHAR_LENGTH(tablename.name)
-CHAR_LENGTH(REPLACE(tablename.name, ',', ''))>=numbers.n-1
order by
id, n
查看一个工作示例here:
如果你只需要替换空格 - 那么你可以使用
SELECT TRIM(两个“\ n”FROM REPLACE(REPLACE(column_name,'',“\ n”),“ - ”,“\ n”))FROM table;
如果您想要从开头和结尾开始前导或尾随空格,可以从上面的语句中跳过trim。