Perbarui satu tabel berdasarkan nilai di tabel lain menggunakan pernyataan kasus (MYSQL)

Coba ini dengan JOIN

UPDATE 
  tbl_a AS a
  JOIN   
  tbl_b AS b ON (a.DIV_NO = b.Div_num AND  a.OFR_ID = b.Flg) 
  SET
  a.MIN_5 = b.Min_Five,
  a.IN_PR = b.Ad_Flag,
  a.FRC = 
    CASE
      WHEN b.Prc_Fl = 'N' 
      THEN 'Y' 
      WHEN b.Prc_Fl = 'Y' 
      THEN 'N' 
      ELSE 'D' 
    END