encryption/decryption all the columns in the table

I want to encrypt and decrypt the all columns in the table.

With the following i m able to encrypt/decrypt only one column in the table.

CREATE MASTER KEY ENCRYPTION BY 
PASSWORD='LORD'

CREATE CERTIFICATE ENCDECTEST
WITH SUBJECT='LORD'

SELECT * FROM SYS.CERTIFICATES

CREATE SYMMETRIC KEY TESTKEY
WITH ALGORITHM=TRIPLE_DES
ENCRYPTION BY CERTIFICATE ENCDECTEST

--Sample table

CREATE TABLE USERS 
(UID INT IDENTITY(100,1),
UFNAME VARCHAR(100),
ULNAME VARCHAR(100),
ULOGINDI VARCHAR(50),
UPASSWORD VARBINARY(256))

Procedure to Insert Data in Table

ALTER PROC [InsertUSER]  
@UFNAME VARCHAR(100), 
@ULNAME VARCHAR(100),  
@ULOGINDI VARCHAR(12),  
@UPASSWORD VARCHAR(20),
@SALARY VARCHAR(20)
AS
BEGIN
opening the key as it is not already   
 OPEN SYMMETRIC KEY TESTKEY
  DECRYPTION BY CERTIFICATE ENCDECTEST;   

 -- Insert statement 
   INSERT INTO [USERS]
    (UFNAME, ULNAME, ULOGINDI, UPASSWORD,SALARY) 
    VALUES   
  (@UFNAME, @ULNAME, @ULOGINDI,
      EncryptByKey(Key_GUID('TESTKEY'), @UPASSWORD),
      EncryptByKey(Key_GUID('TEST_KEY'),@SALARY));   
  END;

--Insert Procedure

EXEC INSERTUSER 'Koti','Routhu','Koti_J_Routhu','GloryToLORD','GloryToLORD'

-- Procedure to Retrive Users

CREATE PROC [RetrieveUSER]    @UID INT
AS
BEGIN
-- open the key as it is not already 
   OPEN SYMMETRIC KEY TESTKEY 
    DECRYPTION BY CERTIFICATE ENCDECTEST;
 -- Select statement 
 SELECT UID, 
            UFNAME, 
            ULNAME, 
            ULOGINDI, 
            CONVERT(VARCHAR(20),DECRYPTBYKEY(UPASSWORD)) AS PASSWORD  
    FROM USERS  WHERE UID = @UID;
END; 

-- Execute Retrive Procedure
EXEC RetrieveUSER 100

Please help me to encrypt/decrypt all the columns in the table. Thank you

A later question (duplicate; now closed) was asked by the same person with the following additional comment:

i dont want to use TDE(Transparent Data Encryption)