SQL：在存儲過程中顯示來自表的結果

Question

我必須實現一個打包系統。我有以下表和插入表中：

--a 
create table client(
IdClient number(5), 
NameClient varchar2(20), 
Address varchar2(20), 
primary key(IdClient) 
); 

create table tpackage(
IdPackage number(5), 
IdClient number(5), 
WLocation varchar2(20), 
Courier varchar2(20), 
DeliveryTime date, 
Status varchar2(20), 
primary key(IdPackage), 
constraint fk_package foreign key(IdClient) references client(IdClient) 
); 

insert into client values(1,'Robb','Dimitrie Cantemir 1'); 
insert into client values(2,'Ion','Aleea Cascadei 15'); 
insert into client values(3,'Popan','Progresului 1'); 
insert into client values(4,'Pop','Carei 15'); 
insert into client values(5,'Grozavescu','Vasile Pirvan 1'); 
insert into client values(6,'Popa','Orsova 11'); 

insert into tpackage values(01,1,'Diminetii 2','Ilie','22-Jan-2017','in-transit'); 
insert into tpackage values(02,6,'Liege 1','Popescu','23-NOV-2016','delivered'); 
insert into tpackage values(03,4,'Crisana 3','Alexandru','20-Jan-2017','in-transit'); 
insert into tpackage values(04,3,'Torontal 14','Stefan','18-Dec-2016','delivered'); 
insert into tpackage values(05,2,'Carei 15','Ionescu','23-Feb-2017','in-transit'); 

我要實現的是顯示了在運輸過程中包作爲參數給出客戶端的所有包信息的存儲過程。這是我迄今爲止所做的：

create or replace procedure displayPackages(i_IdClient number) as 
begin 
--SELECT t.Status from tpackage as t inner join client as c on t.IdClient = c.IdClient where t.Status='in-transit' and c.IdClient = IdClient and t.IdClient = IdClient and c.IdClient = t.IdClient; 
select t.status,c.NameClient from tpackage t,client c where t.Status='in-transit' and c.IdClient = i_IdClient and c.IdClient = t.IdClient; 
end displayPackages; 

但這不起作用。提前致謝！

Answer 1

在PL/SQL中，您不能只選擇。您需要指定將存儲查詢結果的變量。

create or replace procedure displayPackages(i_IdClient number) as 
tstatus tpackage.status%type; 
cname client.NameClient%type; 
begin 
select t.status,c.NameClient into tstatus, cname 
    from tpackage t inner join client c on (c.IdClient = t.IdClient) 
    where t.Status='in-transit' and c.IdClient = i_IdClient; 
--after selecting data into variables you can do your calculations or other operations on variables 
end displayPackages;