我是SQL新手,遇到了一个奇怪的问题.所以我有两张桌子 供应商.这是供应商表.
I am new to SQL and I encountered a weird problem. So I have two tables OFFERS and SUPPLIER. Here is the Supplier table.
CREATE TABLE "SUPPLIER" ( "S#" NUMBER, "NAME" VARCHAR2(50), "CITY" VARCHAR2(50), PRIMARY KEY ("S#") ENABLE )这是OFFERS表.
CREATE TABLE "OFFERS" ( "P#" NUMBER, "S#" NUMBER, "V#" NUMBER, "PR#" NUMBER, CONSTRAINT "PK_OFFERS" PRIMARY KEY ("P#") ENABLE )所以现在,当我尝试像这样向offers表添加外键约束
So now, when I try to add a Foreign key constraint to the offers table like this
ALTER TABLE OFFERS ADD CONSTRAINT FK_SUPPLIERS FOREIGN KEY(S#) REFERENCES SUPPLIER (S#) ON DELETE CASCADE ON UPDATE CASCADE我收到一条错误消息:"ORA-01735:无效的ALTER TABLE选项".如果我删除最后一行,即"ON UPDATE CASCADE",则可以正常工作.那么,我在做什么错呢?我在互联网上看到了很多类似的例子,这些例子本来可以工作,所以我有点困惑.如果有任何区别,我正在apex.oracle上工作.
I get an error saying : "ORA-01735: invalid ALTER TABLE option". If I remove the last line, which is "ON UPDATE CASCADE" this works perfectly fine. So, what am I doing wrong? I've seen a lot of examples like this on the internet, that are supposed to work, so I am kinda confused. I am working on apex.oracle if that makes any difference.
推荐答案Oracle中没有更新级联":
There is no "on update cascade" in Oracle as far as I know (even in current versions):
asktom .oracle/pls/asktom/f?p = 100:11:0 ::::: P11_QUESTION_ID:5773459616034
更多推荐
SQL,有关删除级联和有关更新级联
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