Update statement that includes case, decode and from clause

Question

hello
I've the following code. I ran this code in 9i and got the errror SQL command not properly ended. Can I use FROM clause in an update statement?
CREATE OR REPLACE procedure NRI
IS
BEGIN
UPDATE IEB2 SET SDI =
(CASE PSDI WHEN '11' THEN '16'
WHEN '13' THEN '38'
WHEN '14' THEN '18'
WHEN '23' THEN '21'
WHEN '24' THEN '21'
WHEN '31' THEN '27'
WHEN '32' THEN '37'
WHEN '33' THEN '38'
WHEN '34' THEN '37'
WHEN '43' THEN '46'
WHEN '53' THEN '45'
WHEN '55' THEN '48'
WHEN '60' THEN '54'
WHEN '61' THEN '57'
WHEN '62' THEN '54'
WHEN '63' THEN '56'
WHEN '64' THEN '52'
WHEN '70' THEN '21'
WHEN '77' THEN '25'
WHEN '78' THEN '41'
WHEN '80' THEN '79'
WHEN '85' THEN '75'
WHEN '87' THEN '73'
WHEN '15' THEN '15'
WHEN '51' THEN '51'
WHEN '88' THEN '88'
WHEN '00' THEN '00'
WHEN '99' THEN '99'
WHEN '12' THEN DECODE(C.R_ID, 'N', '16','18')
ELSE 'NONE' END)
FROM D1.C C
WHERE EXISTS
(SELECT 1
FROM D1.SD A, D2.SDP B, D1.C C
WHERE A.SDN = B.DN
AND B.SDI = '000000'
AND B.PFI = 'W'
AND B.CID = C.CID
AND A.SDN = '0001500721');
END;

Answer 1

Your parenthesis look a tad messed up ... think this fixes them.
CREATE OR REPLACE procedure NRI
IS
BEGIN
UPDATE IEB2 SET SDI =
SELECT
CASE PSDI
  WHEN '11' THEN '16'
  WHEN '13' THEN '38'
  WHEN '14' THEN '18'
  WHEN '23' THEN '21'
  WHEN '24' THEN '21'
  WHEN '31' THEN '27'
  WHEN '32' THEN '37'
  WHEN '33' THEN '38'
  WHEN '34' THEN '37'
  WHEN '43' THEN '46'
  WHEN '53' THEN '45'
  WHEN '55' THEN '48'
  WHEN '60' THEN '54'
  WHEN '61' THEN '57'
  WHEN '62' THEN '54'
  WHEN '63' THEN '56'
  WHEN '64' THEN '52'
  WHEN '70' THEN '21'
  WHEN '77' THEN '25'
  WHEN '78' THEN '41'
  WHEN '80' THEN '79'
  WHEN '85' THEN '75'
  WHEN '87' THEN '73'
  WHEN '15' THEN '15'
  WHEN '51' THEN '51'
  WHEN '88' THEN '88'
  WHEN '00' THEN '00'
  WHEN '99' THEN '99'
  WHEN '12' THEN DECODE(C.R_ID, 'N', '16','18')
  ELSE 'NONE'
END
FROM D1.C C
WHERE EXISTS 
    SELECT 1
    FROM D1.SD A, D2.SDP B, D1.C C
    WHERE A.SDN = B.DN
    AND B.SDI = '000000'
    AND B.PFI = 'W'
    AND B.CID = C.CID
    AND A.SDN = '0001500721'
END;