Question

以下是我的查询，我需要在选择子查询中输入列值，而不是获取列名 @Temp =临时表

insert into @Temp([dateTime],Reading) 
values (@startDate,(select top(1) @trendId from TABLENAME where deviceTimestamp >= @startDate and deviceTimestamp < @tempdt  order by deviceTimestamp desc))

ALTER PROCEDURE ProcName 
#trendId as nvarchar(max), 
#startDate as datetime, 
#endDate as datetime 
AS 
BEGIN 
  declare #stt varchar(200) = 'select deviceTimestamp,' + #trendId + ' '+'as reading 
  from TableName 
  where deviceTimestamp >= '+#startDate+'and deviceTimestamp < '+#endDate+' 
  order by deviceTimestamp desc' 

exec(#stt)END

我收到错误消息：

从字符串转换日期和/或时间时转换失败。

Answer 1

DECLARE @sqlCommand varchar(1000)
DECLARE @columnList varchar(75)
DECLARE @city varchar(75)

SET @columnList = 'AddressID, AddressLine1, City'
SET @city = '''London'''
SET @sqlCommand = 'SELECT ' + @columnList + ' FROM Person.Address WHERE City = ' + @city

EXEC (@sqlCommand)

Check this link out.动态SQL似乎可以满足您的需要，您可以将表名和表列动态传递给查询。因此，您可以将列名作为参数变量传递。否则，您只需选择plainText作为记录。

在子查询中获取SQL Server中的列值

1 个答案: