Question

像declare @var nvarchar(max) = 'a=2*b=3*c=4|a=10*b=11*c=12|a=20*b=21*c=22'这样的变量想要将其拆分为表变量

declare @tbl TABLE(a varchar(50),b varchar(50),c varchar(50))

回应必须如下：

a    b     c
2    3     4
10   11    12
20   21    22

怎么做？

Answer 1

当您的字段顺序始终排序时，请使用以下命令：

declare @var nvarchar(max) = 'a=2*b=3*c=4|a=10*b=11*c=12|a=20*b=21*c=22'

SET @var = REPLACE(@var, '*', ',')
SET @var = 'SELECT ' + REPLACE(@var, '|', ' UNION ALL SELECT ')

EXEC(@var)

如果您的结果总是有三列，但字段顺序可能会发生变化：

declare @var nvarchar(max) = 'a=2*b=3*c=4|b=10*a=11*c=12|a=20*b=21*c=22'

SET @var = REPLACE(@var, '*', ',')
SET @var = 'SELECT a,b,c FROM (SELECT ' + REPLACE(@var, '|', ') DT UNION ALL SELECT a,b,c FROM (SELECT ') + ') DT'

EXEC(@var)

Answer 2

由于这是对高级问题的回答，我再添加一个答案：

您可以指定数据类型，并特别转换为德语日期时间和列名称，如下所示：

declare @var nvarchar(max) = 'id=000004650439*dated=22.10.2015*cc=0.27|id=000004650440*dated=30.10.2015*cc=10'

SET @var = REPLACE(@var, '*', ''',')
SET @var = REPLACE(@var, '=', '=''') + ''''

SET @var = 'SELECT CAST(Null As bigint) As Col1, CAST(Null As nvarchar(15)) As Col2, CAST(Null As decimal(10,5)) As Col3 UNION ALL SELECT ' + 
           REPLACE(@var, '|', ''' UNION ALL SELECT  ') + ''

SET @var = 'SELECT Col1, CONVERT(datetime, Col2, 104) As Col2, Col3 FROM (' + @var + ') DT WHERE Col1 IS NOT NULL'
EXEC(@var)

如何将两个拆分数据分开两个？

2 个答案: