Inline SQL Not Updating - sql-server-2008

Question

My print statement fails each time and so does my exec, anytime I try to run this statement it just tells me command completed successfully. I added the print statement to try to see what was actually being executed, but I am still mind-blown on this. Can someone here please help me?
Shouldn't the Print statement at least show me what I am trying to run? If I print each variable individually before trying to run the update it shows the correct value, so I can only assume it is something way wrong with my update statement?
Declare #fulldata varchar(30), #rsi varchar(50), #employeename varchar(50), #email varchar(50), #rsi2 varchar(50), #email2 varchar(50),
#rsiID varchar(50), #calldate datetime, #calltime datetime, #orderdate datetime, #email3 varchar(50), #uniqueID int, #sql varchar(max)
Set #fullData = 'tvdb'
Set #rsi = 'Alphabet'
Set #employeename = 'Mike Jones'
Set #email = '123abc#gmail.com'
Set #rsi2 = 'Broccoli'
Set #email2 = 'abc123#gmail.com'
Set #rsiID = 'alt16bc'
Set #calldate = '06/15/2015'
Set #calltime = '12:15:00'
Set #orderdate = '06/16/2015'
Set #email3 = 'pineapple1841#gmail.com'
Set #uniqueID = 172855
Set #sql =
'update '+#fulldata+' '
+ 'set rsi = COALESCE('''+#rsi+''',''''), '
+ 'employeename = COALESCE('''+#employeename+''',''''), '
+ 'email = COALESCE('''+#email+''',''''), '
+ 'rsi2 = COALESCE('''+#rsi2+''',''''), '
+ 'email2 = COALESCE('''+#email2+''',''''), '
+ 'rsiID = COALESCE('''+#rsiID+''',''''), '
+ 'calldate = COALESCE('''+CAST(#calldate As Varchar)+''',''''), '
+ 'calltime = COALESCE('''+CAST(#calltime As Varchar)+''',''''), '
+ 'orderdate = COALESCE('''+CAST(#orderdate As Varchar)+''',''''), '
+ 'email3 = COALESCE('''+#email3+''','''') '
+ 'where uniqueID = '+CAST(#uniqueID As Varchar)+' and '+CAST(#uniqueID As Varchar)+' > 0 '
Print #sql
exec (#sql)
EDIT ---
If I try to insert my statements into a table to check it is null. Which leads me to why is #sql not being assigned?
Insert Into #SqlStatement (sql12) VALUES (#sql)
Select * FROM #SqlStatement

Answer 1

Are you sure you have all lines included here? and you can run it without error?
At least your don't have declaration of #sql.
Even you declare the #sql, this line will give you error:
Set uniqueID = 172855
It should be
Set #uniqueID = 172855
Without assigning values to #uniqueID, your whole #sql is be NULL and print will generate NO output.
update tvdb set rsi = COALESCE('Alphabet',''), employeename = COALESCE('Mike Jones',''), email = COALESCE('123abc#gmail.com',''), rsi2 = COALESCE('Broccoli',''), email2 = COALESCE('abc123#gmail.com',''), rsiID = COALESCE('alt16bc',''), calldate = COALESCE('Jun 15 2015 12:00AM',''), calltime = COALESCE('Jan 1 1900 12:15PM',''), orderdate = COALESCE('Jun 16 2015 12:00AM',''), email3 = COALESCE('pineapple1841#gmail.com','') where uniqueID = 172855 and 172855 > 0
Msg 208, Level 16, State 1, Line 1
Invalid object name 'tvdb'.
To debug your code, you can comment out some lines like:
Set #sql =
'update '+#fulldata+' '
+ 'set rsi = COALESCE('''+#rsi+''',''''), '
---+ 'employeename = COALESCE('''+#employeename+''',''''), '
----+ 'email = COALESCE('''+#email+''',''''), '
----+ 'rsi2 = COALESCE('''+#rsi2+''',''''), '
----+ 'email2 = COALESCE('''+#email2+''',''''), '
----+ 'rsiID = COALESCE('''+#rsiID+''',''''), '
----+ 'calldate = COALESCE('''+CAST(#calldate As Varchar)+''',''''), '
----+ 'calltime = COALESCE('''+CAST(#calltime As Varchar)+''',''''), '
----+ 'orderdate = COALESCE('''+CAST(#orderdate As Varchar)+''',''''), '
----+ 'email3 = COALESCE('''+#email3+''','''') '
----+ 'where uniqueID = '+CAST(#uniqueID As Varchar)+' and '+CAST(#uniqueID As Varchar)+' > 0 '
Print #sql
exec (#sql)
and uncomment one line a time until you find the problematic line.
To catch values and make sure you have a non-null #sql, you need use the COALESCE this way:
Set #sql =
'update '+#fulldata+' ' ...
+ 'email = '''+COALESCE(#email,'')+''','