How to delete a common row from multiple tables using SQL -

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i understand can delete multiple tables using joins. but, i'm not sure how that. tried using statement , didn't work either.

delete trm, val  mcs.stg_mdcr_trmntn_rpt trm, mcs.stg_mdcr_vldtn_rpt val trm.import_proc_id = 156;

what's wrong with

delete mcs.stg_mdcr_trmntn_rpt  import_proc_id = 156;  delete mcs.stg_mdcr_vldtn_rpt import_proc_id = 156;  commit;

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