如何將多行字符串拆分為tsql中的列

Question

我有一個數據庫字段，其中包含存儲為多行字符串的地址信息。

88 Park View
Hemmingdale
London

誰能告訴我將第1行，第2行和第3行作為select語句中的不同字段的最佳方法？

關心理查德

Answer 1

嘗試這樣的事情？ 請注意，這有點脆弱

DECLARE @S VARCHAR(500), @Query VARCHAR(1000)
SELECT @S='88 Park View
           Hemmingdale
           London'

SELECT @Query=''''+ REPLACE(@S, CHAR(13),''',''')+''''
EXEC('SELECT '+@Query)

結果

88 Park View | Hemmingdale | London

Answer 2

這是我想出的一個解決方案，我使用CTE遞歸迭代一個值表，並用新行CHAR(13)將它們拆分出來，然后使用PIVOT顯示結果。 您只需將這些列添加到PIVOT即可將其擴展為其他列（超過5個）。

DECLARE @Table AS TABLE(ID int, SomeText VARCHAR(MAX))

INSERT INTO @Table VALUES(1, '88 Park View
Hemmingdale
London')

INSERT INTO @Table VALUES(2, '100 Main Street
Hemmingdale
London')

INSERT INTO @Table VALUES(3, '123 6th Street
Appt. B
Hemmingdale
London')

;WITH SplitValues (ID, OriginalValue, SplitValue, Level)
AS
(
    SELECT  ID, SomeText, CAST('' AS VARCHAR(MAX)), 0 FROM @Table

    UNION ALL

    SELECT  ID
    ,   SUBSTRING(OriginalValue, CASE WHEN CHARINDEX(CHAR(13), OriginalValue) = 0 THEN LEN(OriginalValue) + 1 ELSE CHARINDEX(CHAR(13), OriginalValue) + 2 END, LEN(OriginalValue))
    ,   SUBSTRING(OriginalValue, 0, CASE WHEN CHARINDEX(CHAR(13), OriginalValue) = 0 THEN LEN(OriginalValue) + 1 ELSE CHARINDEX(CHAR(13), OriginalValue) END)
    ,   Level + 1
    FROM    SplitValues
    WHERE   LEN(SplitValues.OriginalValue) > 0
)

SELECT  ID, [1] AS Level1, [2] AS Level2, [3] AS Level3, [4] AS Level4, [5] AS Level5
FROM    (
    SELECT  ID, Level, SplitValue
    FROM    SplitValues
    WHERE   Level > 0
    ) AS p
PIVOT   (MAX(SplitValue) FOR Level IN ([1], [2], [3], [4], [5])) AS pvt

結果：

ID          Level1               Level2               Level3               Level4               Level5
----------- -------------------- -------------------- -------------------- -------------------- --------------------
1           88 Park View         Hemmingdale          London               NULL                 NULL
2           100 Main Street      Hemmingdale          London               NULL                 NULL
3           123 6th Street       Appt. B              Hemmingdale          London               NULL

Answer 3

只是為了好玩，用XML解決方案更新。 這應該處理'。' 問題，可以很容易地擴展到更多的行。

DECLARE @xml XML , @S VARCHAR(500) = '88 Park View
Hemmingdale
London'

SET @xml  = CAST('<row><col>' + REPLACE(@S,CHAR(13),'</col><col>') + '</col></row>' AS XML)

SELECT  
     line.col.value('col[1]', 'varchar(1000)') AS line1
    ,line.col.value('col[2]', 'varchar(1000)') AS line2
    ,line.col.value('col[3]', 'varchar(1000)') AS line3
FROM    @xml.nodes('/row') AS line(col)

Answer 4

我知道這很可怕但是這樣你就有3列中的3行叫做l1，l2和l3：

declare @input nvarchar(max) =  'line 1' + CHAR(13) + CHAR(10) + 'line 2' + CHAR(13) + CHAR(10) + 'line 3' + CHAR(13) + CHAR(10) + 'line 4' + CHAR(13) + CHAR(10) + 'line 5'
declare @delimiter nvarchar(10) = CHAR(13) + CHAR(10)

declare @outtable table (id int primary key identity(1,1), data nvarchar(1000) )

declare @pos int = 1
declare @temp nvarchar(1000)

if substring( @input, 1, len(@delimiter) ) = @delimiter
begin
    set @input = substring(@input, 1+len(@delimiter), len(@input))
end

while @pos > 0
begin

    set @pos = patindex('%' + @delimiter + '%', @input)

    if @pos > 0
        set @temp = substring(@input, 1, @pos-1)
    else
        set @temp = @input

    insert into @outtable ( data ) values ( @temp )

    set @input = substring(@input, @pos+len(@delimiter), len(@input))

end

select
    top 1 ISNULL(a.data,'') as l1, ISNULL(b.data,'') as l2, ISNULL(c.data,'') as l3
from
    @outtable a
        left outer join @outtable b on b.id = 2
        left outer join @outtable c on c.id = 3

這里是方便的