嵌入SQL编程 报-305解决方案

嵌入SQL编程 报-305
EXEC SQL INCLUDE sqlca;
tst()
{

EXEC SQL BEGIN DECLARE SECTION;
  char sCrdNo[25+1];
  char sTxnDt[10+1];
  char sSndBnk[11+1];

  char sSumMny[36];
EXEC SQL END DECLARE SECTION;

  EXEC SQL
  SELECT char(sum(txnamt)) into :sSumMny
  FROM gctact
  WHERE crdno = :sCrdNo and
  substr(sndbnk,5,4) = :sSndBnk and
  txndate = :sTxnDt and
  sta = '0'and
  revcd = '0'and
  txncod ='22031';

}

------解决方案--------------------------------------------------------
没输入参数
------解决方案--------------------------------------------------------
参数没有值吧
------解决方案--------------------------------------------------------
参数没有值吧