Issue with red marked line in your query , you make mistake in two place one is where condition is putting in column vlaue in select
and join condition should be using ON
select Projectdtls.ProjectId,Projectdtls.Name,
Projectdtls.Projectdate=(select CONVERT(varchar(10),getdate(),101)),
Projectdtls.Venue,EmployeeDetails.EmployeeName from Projectdtls,EmployeeDetails
Where Projectdtls.EmployeeId = EmployeeDetails.EmployeeId
Change above query as follows to corect
select Projectdtls.ProjectId,Projectdtls.Name,
Projectdtls.Venue,EmployeeDetails.EmployeeName from Projectdtls,EmployeeDetails
ON Projectdtls.EmployeeId = EmployeeDetails.EmployeeId
Where CONVERT( varchar(10), Projectdtls.Projectdate,101) = CONVERT(varchar(10),getdate(),101)
hope this helps you