how to check empty table in sql server 2008?

CREATE procedure [dbo].[ReportByDate]  
(  
 @StartDate DATE,  
 @EndDate DATE,
 @Email nvarchar(40)
 )  
as  
begin  
If exists(select 1 from tblWorkExpDetails)  
begin
select  
pd.FirstName,  
pd.LastName,  
pd.Mobile,  
pd.Email,  
pd.Sources,  
ed.XthPercentage,  
ed.XIIthPercentage,  
wed.CurrentSalary,  
wed.TotalExperience 
from  
tblPersonalDetails pd   
Inner Join tblEducationalDetails ed on pd.Email=ed.Email  
Inner Join tblWorkExpDetails wed on pd.Email=wed.Email  
where pd.JoinDate Between @StartDate and @EndDate  
end
else if exists(select 1 from tblFresherDetails)   
select   
pd.FirstName,  
pd.LastName,  
pd.Mobile,  
pd.Email,  
pd.Sources,  
ed.XthPercentage,  
ed.XIIthPercentage,  
fd.Typing   
from  

tblPersonalDetails pd   
Inner Join tblEducationalDetails ed on pd.Email=ed.Email  
Inner Join tblFresherDetails fd on pd.Email=fd.Email  
where pd.JoinDate Between @StartDate and @EndDate
end;