sql将列值返回到逗号分隔的字符串中

how do i get returned columns into a comma delimited string? I'm trying to get @sql to be used but had to manually type in the values.

如何将返回的列转换为逗号分隔的字符串？我正在尝试使用@sql但必须手动输入值。

declare @orderId as int, @sql AS VARCHAR(MAX)
set @orderId = 10
set @sql = 'select orderId, categoryId, itemId from Orders where orderId = ' + CONVERT(varchar(10), @orderId)
--select @sql as 'sql stmt' --select orderId, categoryId, itemId from Orders where orderId = 10
--execute(@sql) 
--will return as:
--orderId categoryId itemId
--10 281 1054
declare @dt table(orderId varchar(10), categoryId varchar(10), itemId varchar(10))
--insert @dt values (@sql)
insert @dt values ('10','281','1054') -- did this to get results but want to use @sql
--how to get the @sql to be a string as '10','281','1054'
select '{"orderinfo" : [' + STUFF((
    select 
        ',{"Order Id":' + orderId
        + ',"Category Id":' + categoryId
        + ',"Item Id":' + itemId
        +'}'

    from @dt
    for xml path(''), type
 ).value('.', 'varchar(max)'), 1, 1, '') + ']}' as jsonData
--end results: {"orderinfo" : [{"Order Id":10,"Category Id":281,"Item Id":1054}]}

I'm mostly interested in returning json formatted data.

我最感兴趣的是返回json格式的数据。

2 个解决方案

#1

declare @orderId as int, @sql AS VARCHAR(MAX)
set @orderId = 10
set @sql = 'select orderId, categoryId, itemId from Orders where orderId = ' + CONVERT(varchar(10), @orderId)

declare @dt table(orderId varchar(10), categoryId varchar(10), itemId varchar(10))


 insert into @dt  exec(@sql)
-- this is what you needed


select '{"orderinfo" : [' + STUFF((
    select 
        ',{"Order Id":' + orderId
        + ',"Category Id":' + categoryId
        + ',"Item Id":' + itemId
        +'}'

    from @dt
    for xml path(''), type
 ).value('.', 'varchar(max)'), 1, 1, '') + ']}' as jsonData
--end results: {"orderinfo" : [{"Order Id":10,"Category Id":281,"Item Id":1054}]}

#2

I suggest you create a scalar-function that uses a cursor that fetches and builds a delineated string.

我建议你创建一个标量函数，它使用一个游标来获取和构建一个描述的字符串。

Then call your function on the select of your query.

然后在选择查询时调用您的函数。