Character set error comming in stored procedure

Question

i am writing these SQL lines when execute these giving me error
SQL Lines
SELECT DocDate,
NVL(SMTransType.Description, '<Not Provided>') DESCRIPTION,
CASE
WHEN DocType = 'GRN' THEN ( SELECT GrnNo
FROM IVGrnMst
WHERE ID = DocID )
END "ReceiptNo",
CASE
WHEN DocType = 'PUR' THEN ( SELECT PrNo ---- its data type VARCHAR2(50)
FROM IVPurReturnMst
WHERE ID = DocID )
WHEN DocType = 'SCP' THEN ( SELECT ConsumptionCode --its data type NVARCHAR2(50)*
FROM IvStoreConsumptionMst
WHERE ConsumptionId = DocID )
END "IssueNo"
FROM IVStockRegister Stock INNER JOIN
SMTransType
ON Stock.DocType = SMTransType.Code;
SQL SQL Error: ORA-12704: character set mismatch
12704. 00000 - "character set mismatch"

Answer 1

are you sure your SELECTs on in the case after when return single value?
try this, please
SELECT DocDate,
  NVL(SMTransType.Description, '<Not Provided>') DESCRIPTION,
  CASE
    WHEN DocType = 'GRN'
    THEN
      ( SELECT MIN(GrnNo) FROM IVGrnMst WHERE ID = DocID
  END "ReceiptNo",
  CASE
    WHEN DocType = 'PUR'
    THEN
      (SELECT MIN(PrNo) ---- its data type VARCHAR2(50)
      FROM IVPurReturnMst
      WHERE ID = DocID
    WHEN DocType = 'SCP'
    THEN
      (SELECT MIN(ConsumptionCode) --its data type NVARCHAR2(50)
      FROM IvStoreConsumptionMst
      WHERE ConsumptionId = DocID
  END "IssueNo"
FROM IVStockRegister Stock
INNER JOIN SMTransType
ON Stock.DocType = SMTransType.Code;