expression in ssis

i have stg_table

sin    lcode
123    01
123    02
123   03

join it with d_code
d_code  desc               d_code_id
-99         unknown         -99
01           usa                   2
02           ca                    3

when i join them using left outer

i get results like below

sin       lcode  d_code_id
123    01            2
123    02            3
123   03            null

i want null to be -99 i try to do in expression isnull(d_code_id) =-99 it is not liking it
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ValentinoVBI ConsultantCommented:
You could use this: COALESCE(d_code_id, -99)

ValentinoVBI ConsultantCommented:
In case you were wondering, syntax for ISNULL is similar: ISNULL(d_code_id, -99)

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