Question

表是

create table mtest
(
     id int,
     strval varchar(150),
     strval1 varchar(150)
)

insert into mtest 
values (1, 'a b c d', 'xxyyzzaa')

insert into mtest 
values(2, 'e f', 'ccdd')

insert into mtest 
values(3, 'g h i', 'llmmnn')

insert into mtest 
values(4, 'j', 'kk')

答案应该是

1 xx
1 yy
1 zz
1 aa
2 cc
2 dd....

Answer 1

试试这个

DECLARE @mtest TABLE (Id int, strval VARCHAR(150), strval1 VARCHAR(150))
INSERT INTO @mtest 
VALUES
(1,'a b c d','xxyyzzaa'),
(2,'e f','ccdd'),
(3,'g h i','llmmnn'),
(4,'j','kk')

DECLARE @MaxLength INT = (SELECT MAX(LEN(strval1)) FROM @mtest)

;WITH CTE (RowId)
AS
(
    SELECT 1 AS RowId
    UNION ALL
    SELECT RowId + 2 AS Id
    FROM CTE
    WHERE
        RowId < @MaxLength 
)

SELECT
    M.Id,
    M.strval1,          
    SUBSTRING(strval1, C.RowId, 2) AS Result
FROM
    @mtest M CROSS JOIN 
    CTE C
WHERE
    SUBSTRING(strval1, C.RowId, 2) != ''
ORDER BY M.Id

结果：

Id      strval1      Result     
------- ------------ ------
1       xxyyzzaa     xx
1       xxyyzzaa     yy
1       xxyyzzaa     zz
1       xxyyzzaa     aa
2       ccdd         dd
2       ccdd         cc
3       llmmnn       ll
3       llmmnn       mm
3       llmmnn       nn
4       kk           kk

我有一个表，该表中的字符串应该如说明中所示进行拆分

1 个答案: