Oracle生成单据编号存储过程的实例代码

Oracle生成单据编号存储过程，在做订单类似的系统都可能会存在订单编号不重复，或是流水号按日，按年，按月进行重新编号。

可以参考以下存储过程

CREATE OR REPLACe
procedure Pro_GetBillNO(TypeTable in varchar2,cur_mycursor out sys_refcursor)
as
DReceiptCode varchar2(40);
DReceiptName varchar2(50);
DPrefix1 varchar2(50);
DISO varchar2(50);
DIsAutoCreate varchar2(20);
DPrefix2 varchar2(20);
DPrefix3 varchar2(20);
DDatevalue date;
DNO number;
DLength number;
DResetType number;
DSeparator varchar2(20);
DReturnValue varchar2(50);
strSql varchar2(1000);
begin
DReturnValue:='';
select "ReceiptCode","ReceiptName","Prefix1","ISO","IsAutoCreate","Prefix2","Prefix3","Datevalue","NO","Length","ResetType","Separator" into
DReceiptCode,DReceiptName,DPrefix1,DISO,DIsAutoCreate,DPrefix2,DPrefix3,DDatevalue,DNO,DLength,DResetType,DSeparator from
"SysReceiptConfig" where "ReceiptCode"=TypeTable;
if to_number(DResetType)>0
then
if DIsAutoCreate=1 THEN
if DResetType=1 then --按年份
if to_number(to_char(sysdate,'yyyy')) <>to_number(to_char(DDatevalue,'yyyy')) then
update "SysReceiptConfig" set "NO"=1,"Datevalue"=to_date(sysdate) where "ReceiptCode"=TypeTable;
else
update "SysReceiptConfig" set "NO"="NO"+1 where "ReceiptCode"=TypeTable;
end if; --年份
end if;--DResetType=1
if DResetType=2 then --按月份
if to_number(to_char(sysdate,'MM')) <>to_number(to_char(DDatevalue,'MM')) then
update "SysReceiptConfig" set "NO"=1,"Datevalue"=to_date(sysdate) where "ReceiptCode"=TypeTable;
else
update "SysReceiptConfig" set "NO"="NO"+1 where "ReceiptCode"=TypeTable;
end if; --月份
end if;--DResetType=2
if DResetType=3 then --按日
if to_number(to_char(sysdate,'dd')) <>to_number(to_char(DDatevalue,'dd')) then
update "SysReceiptConfig" set "NO"=1,"Datevalue"=to_date(sysdate) where "ReceiptCode"=TypeTable;
else
update "SysReceiptConfig" set "NO"="NO"+1 where "ReceiptCode"=TypeTable;
end if; --月份
end if;--DResetType=3
else
update "SysReceiptConfig" set "NO"="NO"+1 where "ReceiptCode"=TypeTable;
end if;--DResetType
end if;
strSql:=' select * from "SysReceiptConfig" where 1=1 ';
strSql:=strSql ||' and "ReceiptCode"='''||TypeTable||'''';
open cur_mycursor for strSql;
end;

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