Conversion failed when converting the varchar value 'TerminatedByCompany' to data type int I inner join 2 table (Termination Reasons with Users) were the two talk to the each other and Termination Reasons table contains 2 column (Id (int) , Name(varchar)) and the other one , Users Table contains 1 column (EmploymentStatusId (int)) . I can use EmploymentStatusId(int) from tbl Users  with Id (int) from another table wich is Termination Reasons beacuse , both of them have same data type (int):

SELECT 
u AS Status

FROM 
d AS p INNER JOIN d AS u ON u=p
INNER JOIN d AS t ON t = u
WHERE u=214 order by u;


But when i try using EmploymentStatusId (int) from tbl Users with Name (varchar) from tbl Termination Reasons , i got problem:

SELECT
t AS Status

FROM 
d AS p INNER JOIN db AS u ON u.I=p
INNER JOIN b AS t ON t= u
WHERE u=214 order by u;


And then Error : 
Conversion failed when converting the varchar value 'TerminatedByCompany' to data type int.

i know why ,because they have different data type  , therefore they can not talk to the each other. but i tried also to solve this with  Convert  but idont know ,why or how is not working.Can someone please help or point me in the right direction. Thanks.

The Query ,where i tried with CONVERT ,its look like this:

SELECT
CONVERT(INT, CONVERT(VARCHAR(12), t)) as Status

FROM 
db AS p INNER JOIN d AS u ON u =p 
INNER JOIN db AS t ON t.Name = u
WHERE u=214 order by u.FirstName;
I am not entirely sure what you are trying to achieve by joining on t.Name and u.EmploymentStatusId as they are different data types, varchar and int. When this join is being completed it is trying to implicitly convert t.Name into an int and it contains data that cannot be converted as the error message shows.

If you are trying to get the employment status of the user with CustomerId of 214 I would do something similar to:

 SELECT
 t.Name AS Status

 FROM 
 dbo.Paychecks AS p INNER JOIN dbo.Users AS u ON u.Id=p.UserId 
 INNER JOIN dbo.TerminationReasons AS t ON t.Id = u.EmploymentStatusId
 WHERE u.CustomerId=214 order by u.FirstName;


If I have missed the point please clarify exactly what you are trying to achieve.