Question

这里有很多连接帖，但似乎无法找到解决方案：

我有一个包含20列的表格：

ID Col 1 Col 2 Col 3 Col 4等......

我需要将所有列连接在一起，以便我有两列：

ID MasterCommaDelimColumn

然后我需要将其插入到新表中。问题似乎是逗号。我可以将所有内容连接在一起，但是当我添加逗号时，它会将它们视为单独的列，并且插入失败。

修改

DECLARE @SQL varchar(MAX)
CREATE TABLE #AgesServedGroup(
       provider_id INT, Infant VarChar(4), Preschool VarChar(4),
       SchoolAge VarChar(4), Adolescent VarChar(4), YoungAdult VarChar(4),
       Transition VarChar(4), Adult VarChar(4), Senior VarChar(4))

BEGIN
   SET @SQL = 'INSERT INTO #AgesServedGroup (provider_id, Infant, Preschool,
               SchoolAge,Adolescent,YoungAdult,Transition,Adult,Senior)
           SELECT provider_id,
             CASE WHEN provider_age_served_infant = 1 THEN 8 END AS Infant,
             CASE WHEN provider_age_served_pre_school = 1 THEN 13 END AS Preschool,
             CASE WHEN provider_age_served_school_age = 1 THEN 12 END AS SchoolAge,
             CASE WHEN provider_age_served_adolescent = 1 THEN 76 END AS Adolescent,
             CASE WHEN provider_age_served_young_adult = 1 THEN 77  END AS YoungAdult,
             CASE WHEN provider_age_served_transition = 1 THEN 78 END AS Transition,
             CASE WHEN provider_age_served_adult = 1 THEN 79  END AS Adult,
             CASE WHEN provider_age_served_senior = 1 THEN 80  END AS Senior
          FROM  dbo.provider_age_served'
     EXEC (@SQL);
END

 --Combine the ages served code
 CREATE TABLE #AgesServed(
         provider_id int,
         AgesServed VarChar(100))

BEGIN
    SET @SQL = 'INSERT INTO #AgesServed (provider_id, AgesServed)
                SELECT provider_id, Infant + Preschool + SchoolAge +
                      Adolescent + YoungAdult + Transition + Adult + Senior
               FROM #AgesServedGroup'
    EXEC (@SQL);
END

INSERT INTO ProviderExport (link_name, cat_id, link_featured)
SELECT provider_id,CONVERT(varchar(100),AgesServed), 0
FROM #AgesServed 

DROP TABLE #AgesServedGroup
DROP TABLE #AgesServed

再次编辑

--Create the Ages Served Codes
  CREATE TABLE #AgesServedGroup(
  provider_id INT, Infant VarChar(4), Preschool VarChar(4), SchoolAge VarChar(4), Adolescent   VarChar(4), 
  YoungAdult VarChar(4), Transition VarChar(4), Adult VarChar(4), Senior VarChar(4))

  BEGIN
  INSERT INTO #AgesServedGroup (provider_id, Infant, Preschool, SchoolAge,Adolescent,YoungAdult, Transition,Adult,Senior) 
  SELECT provider_id, CASE WHEN provider_age_served_infant = 1 THEN 8 END AS Infant, 
          CASE WHEN provider_age_served_pre_school = 1 THEN 13 END AS Preschool, 
          CASE WHEN provider_age_served_school_age = 1 THEN 12 END AS SchoolAge, 
          CASE WHEN provider_age_served_adolescent = 1 THEN 76 END AS Adolescent, 
          CASE WHEN provider_age_served_young_adult = 1 THEN 77 END AS YoungAdult, 
          CASE WHEN provider_age_served_transition = 1 THEN 78 END AS Transition, 
          CASE WHEN provider_age_served_adult = 1 THEN 79 END AS Adult, 
          CASE WHEN provider_age_served_senior = 1 THEN 80 END AS Senior
   FROM  dbo.provider_age_served        
  END

  --Combine the ages served code
  CREATE TABLE #AgesServed(
  provider_id int,  AgesServed VarChar(100))

  BEGIN
    INSERT INTO #AgesServed (provider_id, AgesServed) SELECT provider_id,
    CASE WHEN Infant Is Not Null THEN Infant + ',' ELSE '' END +
    CASE WHEN Preschool Is Not Null THEN Preschool + ',' ELSE '' END +  
    CASE WHEN SchoolAge Is Not Null THEN SchoolAge + ',' ELSE '' END +  
    CASE WHEN Adolescent Is Not Null THEN Adolescent + ',' ELSE '' END +  
    CASE WHEN YoungAdult Is Not Null THEN YoungAdult + ',' ELSE '' END +  
    CASE WHEN Transition Is Not Null THEN Transition + ',' ELSE '' END +  
    CASE WHEN Adult Is Not Null THEN Adult + ',' ELSE '' END + 
    CASE WHEN Senior Is Not Null THEN Senior ELSE '' END FROM #AgesServedGroup      
  END

  --Add the ages served master code
  BEGIN
    UPDATE #AgesServed SET AgesServed = '1,' + AgesServed WHERE AgesServed <> ''
  END

  --Trim the trailing comma
  BEGIN
    UPDATE #AgesServed SET AgesServed = LEFT(AgesServed, len(AgesServed) -1) WHERE RIGHT(AgesServed,1) = ','
  END

Answer 1

对于MS-SQL，它将依赖于列的数据类型以及它们是否可以为空，但是如果所有内容都是* char类型而不是null，那么这样的东西应该有效。

select  1 as id
        ,'Hello' as col1
        ,' ' as col2
        ,'world' as col3
        ,'!' as col4
into newtable_tbl

select id
      , col1 + ',' + col2 + ',' + col3 + ',' + col4
from  newtable_tbl

Answer 2

首先，这听起来像一个可怕的想法。

但这就是它的样子。

create table #ccat (id int identity (1,1) primary key, MasterCommaDelimColumn varchar(max));

Insert into #ccat (MasterCommaDelimColumn)
Select cast(c1 as varchar)
        + ','+ cast(c2 as varchar)
        + ','+ cast(c3 as varchar)
from (values(1,2,3),(3,4,5),(6,7,8))g(c1,c2,c3);

select * from #ccat;

drop table #ccat;

将许多列连接到一个逗号分隔的字符串并插入到新表中

2 个答案: