MS SQL 字符拆分与合并

--Excel导入数据

if OBJECT_ID('tbl_test') is not null drop table tbl_test

SELECT *

into tbl_test

FROM OpenDataSource

( 'Microsoft.ACE.OLEDB.12.0',

'Data Source=C:\Work\eCat\LevelBasedApplication\test.xlsx;

User ID=Admin;Password=;Extended properties=Excel 12.0')...[Sheet1$]

select * from tbl_test

数据长这样
key value

test1 a,b,ccd,e

test2 a,aa,bb,c

test3 a,aa,b,bb

--拆开

if OBJECT_ID('tbl_test_combine') is not null drop table tbl_test_combine

select distinct a.[key],value = substring(a.value , b.number , charindex(';' , a.[value] + ';' , b.number) - b.number)

into tbl_test_combine

from tbl_test a join master..spt_values  b

on b.type='p' and b.number between 1 and len(a.[value])

where substring(';' + a.value , b.number , 1) = ';'

结果：

key value

test1 a

test1 b

test1 ccd

test1 e

test2 a

test2 aa

test2 bb

test2 c

test3 a

test3 aa

test3 b

test3 bb

--合并

SELECT

  [key]

,'value' = (

              STUFF(

                    (SELECT ','+value

                    FROM tbl_test_combine

                    WHERE [key] = A.[key]

                    FOR xml path('')

                    ),1,1,''

                    )

                )

FROM tbl_test_combine A

--where [FAS KEY] ='OUG0000043'

GROUP by [key]

结果：

key value

test1 a,b,ccd,e

test2 a,aa,bb,c

test3 a,aa,b,bb