SQL如何引用复合主键Oracle？

问题描述

CONSTRAINT fk_column FOREIGN KEY (column1, column2, … column_n) REFERENCES parent_table (column1, column2, … column_n)

在你的情况下

create table Visit_Treat (
TreatCode CHAR(6) constraint cTreatCodeFK references Treatment(TreatCode),
SlotNum NUMBER(2),
DateVisit DATE,
constraint cVisitTreatPK primary key (SlotNum, TreatCode, DateVisit),
constraint fk_slotnumDatevisit FOREIGN KEY(SlotNum,DateVisit) 
references Visit(SlotNum,DateVisit)
);

解决方法

我有两个父表：Treatment和Visit。

处理表：

 create table Treatment (
    TreatCode CHAR(6) constraint cTreatCodeNN not null,Name VARCHAR2(20),constraint cTreatCodePK primary key (TreatCode),);

访问表：

create table Visit (
SlotNum NUMBER(2),DateVisit DATE,ActualArrivalTime DATE,constraint cVisitSlotDatePK primary key (SlotNum,DateVisit)
);

现在，我尝试创建一个子表：

create table Visit_Treat (
TreatCode constraint cTreatCodeFK references Treatment(TreatCode),SlotNum constraint cSlotNumFK references Visit(SlotNum),DateVisit constraint cDateFK references Visit(DateVisit),constraint cVisitTreatPK primary key (SlotNum,TreatCode,DateVisit)
);

一切正常，直到第3行。从第三行开始，即SlotNum constraint ...显示一条消息：no matching unique orprimary key。