sql将列值返回到逗号分隔的字符串中
如何将返回的列转换为逗号分隔的字符串?我试图使用@sql,但必须手动键入值sql将列值返回到逗号分隔的字符串中,sql,sql-server,json,Sql,Sql Server,Json,如何将返回的列转换为逗号分隔的字符串?我试图使用@sql,但必须手动键入值 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 o
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}]}
我最感兴趣的是返回json格式的数据。我建议您创建一个标量函数,该函数使用游标获取并构建一个描述的字符串
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}]}
然后在查询的select上调用您的函数。我建议您创建一个标量函数,该函数使用一个游标来获取和构建一个描述的字符串
然后在查询的select上调用函数。非常感谢-我真不敢相信我没有想到insert into。。。执行的变量——duhHappens一直存在!开发者区块:)谢谢你接受这个答案。也请考虑投票的答案。非常感谢-我不敢相信我没有想到插入…执行的变量——duhHappens一直存在!开发者区块:)谢谢你接受这个答案。也请考虑投票表决的答案。