UPDATE fiscal_sum fs SET
  fs.BeginFiscalSum = 
    CASE fs.FPaymentType
      WHEN 1 THEN 2000
      WHEN 2 THEN 0
      WHEN 3 THEN 500
      -- 
      WHEN 15 THEN 1000
      ELSE 0
    END,
  fs.EndFiscalSum = 
    CASE fs.FPaymentType
      WHEN 1 THEN 2300
      WHEN 2 THEN 0
      WHEN 3 THEN 540
      -- ...
      WHEN 15 THEN 1000
      ELSE 0
    END
WHERE fs.CheckId = 10000;

UPDATE fiscal_sum fs SET
  fs.BeginFiscalSum = 2000, fs.EndFiscalSum = 2300
WHERE fs.CheckId = 10000 AND fs.FPaymentType = 1;

UPDATE fiscal_sum fs SET
  fs.BeginFiscalSum = 0, fs.EndFiscalSum = 0
WHERE fs.CheckId = 10000 AND fs.FPaymentType = 2;

UPDATE fiscal_sum fs SET
  fs.BeginFiscalSum = 500, fs.EndFiscalSum = 540
WHERE fs.CheckId = 10000 AND fs.FPaymentType = 3;

UPDATE fiscal_sum fs SET
  fs.BeginFiscalSum = 0, fs.EndFiscalSum = 0
WHERE fs.CheckId = 10000 AND fs.FPaymentType = 4;

-- FPaymentType  5..15

UPDATE fiscal_sum fs SET
  fs.BeginFiscalSum = 0, fs.EndFiscalSum = 0
WHERE fs.CheckId = 10000 AND fs.FPaymentType = 16;