Why is my SQL Server ORDER BY slow despite the ordered column being indexed?

Question

I have an SQL query (generated by LINQ to Entities) which is roughly like the following:

SELECT * FROM [mydb].[dbo].[employees]
JOIN [mydb].[dbo].[industry]
         


        

Answer 1

You should try below code also

Insert the records into temporary table Without using the Order by clause

SELECT * into #temp FROM [mydb].[dbo].[employees]
JOIN [mydb].[dbo].[industry]
  ON jobs.industryId = industry.id
JOIN [mydb].[dbo].[state]
  ON jobs.stateId = state.id
JOIN [mydb].[dbo].[positionType]
  ON jobs.positionTypeId = positionType.id
JOIN [mydb].[dbo].[payPer]
  ON jobs.salaryPerId = payPer.id
JOIN [mydb].[dbo].[country]
  ON jobs.countryId = country.id
WHERE countryName = 'US'

Now run the statement using Order By Clause

Select * from #temp ORDER BY startDatetime