How do I pass field name as a parameter into a stored procedure

Question

I am using one stored procedure in which I send @columnname whose type in database is float and I also declare parameter float.
When I

Answer 1

You need dynamic sql.

DECLARE @SQL NVARCHAR(4000)
Declare @column varchar 
set @column = 'S_E1' 

SET @SQL = 'select Avg(' + quotename(@column) + ') from TBL_SENSORS'

EXEC sp_executesql @SQL

Update: applied both suggestions for quotename and sp_executesql

New procedure: you can use dynamic SQL to place data into a temp table with a known schema. Refer to column based on alias: ColumnToAvg. Instead of TBL_SENSORS use #TempSensors.

Note: in production you'll want to check if #TempSensors exists and drop if it does.

SET @SQL = 'Select RECORD_TIMESTAMP, '
    + quotename(@ColumnName)   
    + ' as ColumnToAvg 
       INTO #TempSensors
       from TBL_SENSORS
       Where RECORD_TIMESTAMP Between @StartDate and @EndDate 
       And @ColumnName Between @Start And @End'

EXECUTE sp_executesql @sqlCommand
    , N'@StartDate datetime, @EndDate datetime, @Start int, @End int'
    , @StartDate , @EndDate, @Start, @End