2017-10-15 114 views
0

我需要在post_insert触发器中创建select语句。如果是的话,那么可能如何呢? 我想检查另一个表记录是否存在,那么它会更新它,否则插入为新记录。请帮忙。表格6i如果存在记录然后更新

我的块代码是我要运行

DECLARE 
EXSIST_TYPE varchar2(50); 
EXSIST_NAME varchar2(50); 
EXSIST_COMPANY VARCHAR2(100); 
BEGIN 
SELECT PRO_TYPE, PRO_NAME, COMPANY_NAME INTO EXSIST_TYPE, EXSIST_NAME ,EXSIST_COMPANY FROM STOCK; 
IF 
:PURCHASE_DETAIL.PRO_TYPE <> EXSIST_TYPE AND 
:PURCHASE_DETAIL.PRO_NAME <> EXSIST_NAME AND 
:PURCHASE_DETAIL.COMPANY_NAME <> EXSIST_COMPANY THEN*/ 
IF 
:PURCHASE.RADIO_TYPE = 'PURCHASE' THEN 
INSERT INTO STOCK(
PRO_TYPE  , 
PRO_NAME  , 
COMPANY_NAME , 
QUANTITY  , 
PURCHASE_RATE, 
SALE_RATE , 
RACK_NUM  
) 
VALUES 
(
:PURCHASE_DETAIL.PRO_TYPE, 
:PURCHASE_DETAIL.PRO_NAME, 
:PURCHASE_DETAIL.COMPANY_NAME, 
:PURCHASE_DETAIL.QUANTITY, 
:PURCHASE_DETAIL.PRICE, 
:PURCHASE_DETAIL.SALE_PRICE, 
:PURCHASE_DETAIL.RACK_NUM 
); 
END IF; 
ELSIF 
:PURCHASE_DETAIL.PRO_TYPE = EXSIST_TYPE AND 
:PURCHASE_DETAIL.PRO_NAME = EXSIST_NAME AND 
:PURCHASE_DETAIL.COMPANY_NAME = EXSIST_NAME THEN 
IF 
:PURCHASE.RADIO_TYPE = 'PURCHASE' THEN 
UPDATE STOCK SET 
STOCK.QUANTITY = STOCK.QUANTITY+:PURCHASE_DETAIL.QUANTITY 
WHERE 
STOCK.PRO_TYPE = :PURCHASE_DETAIL.PRO_TYPE AND 
STOCK.PRO_NAME = :PURCHASE_DETAIL.PRO_NAME AND 
STOCK.COMPANY_NAME= :PURCHASE_DETAIL.COMPANY_NAME; 
ELSIF 
:PURCHASE.RADIO_TYPE = 'PRCH_RETURN' THEN 
UPDATE STOCK SET 
STOCK.QUANTITY = STOCK.QUANTITY-:PURCHASE_DETAIL.QUANTITY 
WHERE 
STOCK.PRO_TYPE = :PURCHASE_DETAIL.PRO_TYPE AND 
STOCK.PRO_NAME = :PURCHASE_DETAIL.PRO_NAME AND 
STOCK.COMPANY_NAME = :PURCHASE_DETAIL.COMPANY_NAME; 
END IF; 
END IF; 
END; 
+0

请帮助这个话题 –

回答

0

你从来没有说过,当你运行该代码发生了什么事。

总之:你提到的要求(“如果那么它存在,它会更新它,否则插入”)看起来像一个优秀候选人MERGE语句(也称为UPSERT,如更新和插入的组合)。

由于Forms 6i是一款老式的软件,我非常确定MERGE不能直接在那里使用。但是,如果基础数据库至少为9i,则MERGE将工作 - 创建一个包含MERGE的存储过程,并将表单项的值作为参数传递。

下面是一个例子(从here服用;看看更多的例子,我懒得去创造我自己的代码。):

MERGE INTO employees e 
    USING hr_records h 
    ON (e.id = h.emp_id) 
    WHEN MATCHED THEN 
    UPDATE SET e.address = h.address 
    WHEN NOT MATCHED THEN 
    INSERT (id, address) 
    VALUES (h.emp_id, h.address); 
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