Question

我有4个表product，orders，order_hist和order_prod_ref。数据设置如下：

DROP TABLE products;
DROP TABLE orders;
DROP TABLE order_hist;
DROP TABLE ord_prd_ref;
create table products (product_id varchar2(20),FLG CHAR(1));
create table orders (order_id varchar2(20));
create table order_hist (order_id varchar2(20));
create table ord_prd_ref (product_id varchar2(20),order_id varchar2(20),prd_name varchar2(10));

INSERT INTO PRODUCTS values ('1000365007482','Y');
INSERT INTO PRODUCTS values ('1000359547456','N');
INSERT INTO PRODUCTS values ('1000359524206','N');
INSERT INTO PRODUCTS values ('1000082514435','N');
INSERT INTO PRODUCTS values ('1000088066693','N');
commit;

INSERT INTO ORDERS VALUES ('5000099148559');
INSERT INTO ORDERS VALUES ('5000099236099');
INSERT INTO ORDERS VALUES ('5000099705242');
INSERT INTO ORDERS VALUES ('5000002349523');
INSERT INTO ORDERS VALUES ('5000002349523');
INSERT INTO ORDERS VALUES ('5000099148559');
COMMIT;

INSERT INTO ord_prd_ref VALUES ('1000365007482','5000099148559','A');
INSERT INTO ord_prd_ref VALUES ('1000365007482','5000099148559','B');
INSERT INTO ord_prd_ref VALUES ('1000365007482','5000099148559','C');
INSERT INTO ord_prd_ref VALUES ('1000365007482','5000099148559','D');
INSERT INTO ord_prd_ref VALUES ('1000359547456','5000099236099','E');
INSERT INTO ord_prd_ref VALUES ('1000359547456','5000099236099','F');
INSERT INTO ord_prd_ref VALUES ('1000359547456','5000099236099','G');
INSERT INTO ord_prd_ref VALUES ('1000082514435','5000099705242','H');
INSERT INTO ord_prd_ref VALUES ('1000088066693','5000099236099','I');
INSERT INTO ord_prd_ref VALUES ('1000082514435','5000099705242','J');

    INSERT INTO ord_prd_ref VALUES ('1000082514435','5000099705242','K');
    COMMIT;

我想在products.flg ='Y'时从订单中将数据插入到order_hist中，并从订单表中删除该记录。

我尝试了此操作，但没有给我预期的结果，因为只有一个product_id带有flg ='Y'，即1000365007482

INSERT INTO order_hist
select * FROM orders a
WHERE
    EXISTS (
        SELECT
            NULL
        FROM
           products,
            ord_prd_ref,
            orders
        WHERE
            products.product_id = ord_prd_ref.product_id
            AND orders.order_id = ord_prd_ref.order_id
            AND FLG = 'Y'
           AND products.FLG = 'Y'
           );

预期结果应该是将对应的order_id插入order_hist表中，即5000099148559。

 select order_id from ord_prd_ref where product_id = '1000365007482';

非常感谢您的帮助。

谢谢。

Answer 1

尝试一下：

INSERT INTO order_hist
SELECT distinct orders.order_id 
        FROM
           products,
            ord_prd_ref,
            orders
        WHERE
            products.product_id = ord_prd_ref.product_id
            AND orders.order_id = ord_prd_ref.order_id
           AND products.FLG = 'Y'

DELETE from orders where order_id = (
SELECT distinct orders.order_id 
            FROM
               products,
                ord_prd_ref,
                orders
            WHERE
                products.product_id = ord_prd_ref.product_id
                AND orders.order_id = ord_prd_ref.order_id
               AND products.FLG = 'Y')

DELETE from ord_prd_ref where order_id = (
SELECT distinct orders.order_id 
                    FROM
                       products,
                        ord_prd_ref,
                        orders
                    WHERE
                        products.product_id = ord_prd_ref.product_id
                        AND orders.order_id = ord_prd_ref.order_id
                       AND products.FLG = 'Y')

Answer 2

此：

select distinct o.order_id
from products p inner join ord_prd_ref opr
on opr.product_id = p.product_id
inner join orders o
on o.order_id = opr.order_id
where p.flg = 'Y'

返回所需的所有订单ID。
因此，将它们插入order_hist：

insert into order_hist
select * from orders
where order_id in (
    select distinct o.order_id
    from products p inner join ord_prd_ref opr
    on opr.product_id = p.product_id
    inner join orders o
    on o.order_id = opr.order_id
    where p.flg = 'Y'
)

并从订单中将其删除：

delete from orders
where order_id in (
    select distinct o.order_id
    from products p inner join ord_prd_ref opr
    on opr.product_id = p.product_id
    inner join orders o
    on o.order_id = opr.order_id
    where p.flg = 'Y'
)

sql查询-oracle的意外输出

2 个答案: