如何将列拆分为不同的列

Question

我有varchar列有3种类型的值。我想根据值的类型将其拆分为3列。比如我的专栏是，     FactoryName of values

1. 阿南塔
2. 阿南塔
3. ATL
4. ESBL
5. ATL
6. ATL

当FactoryName的值为＆＃34; ANANTA＆＃34;，＆＃34; ATL＆＃34;时，我想要3个名为Factory1，Factory2，Factory3的列。 ＆安培; ＆＃34; ESBL＆＃34;分别。结果应该是

• FACTORY1
• 阿南塔
• 阿南塔
• NULL
• NULL
• NULL

• NULL

• FACTORY2

• NULL
• NULL
• ATL
• NULL
• ATL

• ATL

  我可以使用案例或其他方式吗？怎么样？

Answer 1

使用Pivot转置数据

CREATE TABLE #comp
  (
     name VARCHAR(50)
  )

INSERT #comp
VALUES ('ANANTA'),('ANANTA'),('ATL'),
       ('ESBL'),('ATL'),('ATL')

SELECT [ANANTA] AS factory1,
       [ATL]    AS factory2,
       [ESBL]   AS factory3
FROM   #comp
       PIVOT (Max(name)
             FOR name IN ([ANANTA],
                          [ATL],
                          [ESBL])) piv 

或conditional Aggregate

select  max(case when name = 'ANANTA' then name end) factory1,
        max(case when name = 'ATL' then name end) factory2,
        max(case when name = 'ESBL' then name end) factory3 
from #comp

更新：如果您不想将结果显示为单行，请删除max汇总

SELECT CASE WHEN name = 'ANANTA' THEN name END factory1,
       CASE WHEN name = 'ATL' THEN name END factory2,
       CASE WHEN name = 'ESBL' THEN name END factory3
FROM   #comp