Select ，在 Oracle 中使用游标进行比较和更新

Question

我有两张桌子。

Customer_Master 有 3 列 c_id、c_addr、c_trans Customer_Address 有 3 列 c_id、c_addr、pr

我将 Customer_Master 提取到 Cursor C1 中，并将 Customer_address 提取到 Cursor C2 中。游标 C2 中的 Select 语句有一个 Where 条件，该条件来自从游标 C1 获取的列 c_id 和 c_addr。

游标C1Select语句： Select c_trans, c_id, c_addr, from customer_master

c_trans 是主键。非空且唯一

光标C2Select语句：

Select pr from customer_address where c_id = cid and c_addr = cad

pr 仅包含值 True 或 False。

现在，我必须检查天气 pr 是否包含值 'True'。如果为真，则无需执行任何操作。

如果为假，它必须用 customer_address . c_addr 的值更新 customer_master 的 c_addr，其中 pr 为真）

`Update customer_master 
Set c_addr = (select c_addr from customer_address where pr = 'TRUE' and c_id = cid)
where c_trans = ctrans`

如何实现。

已编辑：

我的代码；

`declare
cid number;
cadd number;
ctras number;
cr varchar(2);
cad number;
cursor c1 IS
select c_tras, c_id, c_add from customer_master;
cursor c2 IS
select c_address, cr from customer_address where c_id = cid;
begin
open c1;
open c2;
LOOP
fetch c1 into ctras, cid, cadd;
fetch c2 into cad, cr;
if cr='N'
THEN
update customer_master set c_address = (select c_address from customer_address where cr = 'Y' and c_id = cid) where c_tras = ctras;
END IF;
END LOOP;
END;`

Answer 1

这很完美。

declare
cid number;
cadd number;
ctras number;
pr varchar(2);
vad number;
cursor c1 IS
select ac_tras, cust_id, cust_addr from customer_master;
cursor c2 IS
select pr_adr from customer_address where cust_id = cid and cust_addr = cadd;
BEGIN
open c1;
LOOP
fetch c1 into ctras, cid, cadd;
EXIT WHEN C1%NOTFOUND;
OPEN c2;
LOOP
fetch c2 into pr;
if pr='Y'
THEN EXIT ;
ELSE
UPDATE customer_master 
set cust_addr = (select cust_addr from customer_address where pr_adr = 'Y' and cust_id = cid) where ac_tras = ctras;
END IF;
EXIT WHEN C2%NOTFOUND;
END LOOP;
Close C2;
END LOOP;
CLOSE C1;
END;

Select ，在 Oracle 中使用游标进行比较和更新

Select , Compare and Update using cursors in Oracle

sql

oracle

oracle11g

cursor