sql server - The multi-part identifier "OrderCredit.User_ID" could not be bound -


what going wrong? running this

sqlcommand comm = new sqlcommand(    "update amounts      set e_wallet = (select ordercredit.orderamount + e_wallet                      ordercredit)      (ordercredit.user_id = @a)", c);

gives following error:

the multi-part identifier “ordercredit.user_id” not bound


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