Question

我是PL / SQL的新手。它一直很好，直到现在。我查询这个查询工作正常。

declare
rec employees_practice%rowtype;
sam taxObligations%rowtype;
socialsecurity number;
rentallowance number;
transportation number;
taxableincome number;
incometaxliability number;
netpay number;
total number;
totaldeductions number;

    begin
    for rec in (select * from employees_practice)
    loop
    socialsecurity:=(5.5/100)*(rec.salary);
    rentallowance:=(20/100)*(rec.salary);
    if(rec.Category='S') 
    then transportation:= 150; 
    else transportation:=100;
    end if;

taxableincome:=rec.Salary-socialsecurity+rentallowance+transportation;

for sam in (select * from taxObligations) 
loop
if(taxableincome between sam.Minincome and sam.Maxincome)
then incometaxliability:= sam.MinimumBracketTax + (taxableincome-sam.Minincome)*(sam.TaxBracketRate/100);
else incometaxliability:=null;
end if;
end loop;
netpay:= taxableincome-incometaxliability;
total:= rec.Salary + rentallowance + transportation;

totaldeductions:=socialsecurity + incometaxliability;

-- Here, I used DBMS.... to give an output in different format.

end loop; 
end;

我现在想要创建一个包含上述代码的函数，这样我就可以使用单个SQL或PL / SQL查询来调用它。这对我来说很头疼。

Answer 1

您可以将其设为pipelined function：

首先你需要一个表类型：

create or replace type result_tab as table of varchar2(32767);

然后，使您的代码成为流水线函数：

create or replace function your_func return result_tab PIPELINED is

rec employees_practice%rowtype;
sam taxObligations%rowtype;
socialsecurity number;
rentallowance number;
transportation number;
taxableincome number;
incometaxliability number;
netpay number;
total number;
totaldeductions number;

    begin
    for rec in (select * from employees_practice)
    loop
    socialsecurity:=(5.5/100)*(rec.salary);
    rentallowance:=(20/100)*(rec.salary);
    if(rec.Category='S') 
    then transportation:= 150; 
    else transportation:=100;
    end if;

taxableincome:=rec.Salary-socialsecurity+rentallowance+transportation;

for sam in (select * from taxObligations) 
loop
if(taxableincome between sam.Minincome and sam.Maxincome)
then incometaxliability:= sam.MinimumBracketTax + (taxableincome-sam.Minincome)*(sam.TaxBracketRate/100);
else incometaxliability:=null;
end if;
end loop;
netpay:= taxableincome-incometaxliability;
total:= rec.Salary + rentallowance + transportation;

totaldeductions:=socialsecurity + incometaxliability;

-- Here, I used PIPE ROW() to give an output in different format.
pipe row('what ever you had in your dbms_output command');

end loop; 

return;

end your_func;

现在，您可以这样调用/查询：

select * from table(your_func)

Answer 2

如果一切正常，请尝试在存储的FUNCTION中使用CURSOR作为IN参数进行全部操作以返回NUMBER。了解变量类型和游标。 Oracle docs应该足以让您自己完成。

之后，如果您遇到代码问题，请在此处发布，您肯定会得到帮助。

创建和调用PL / SQL函数

2 个答案: