I am trying to enforce a CHECK Constraint in a ORACLE Database on multiple tables
CREATE TABLE RollingStocks (
Id NUMBER,
Name Varchar2(80) NOT NULL,
RollingStockCategoryId NUMBER NOT NULL,
CONSTRAINT Pk_RollingStocks Primary Key (Id),
CONSTRAINT Check_RollingStocks_CategoryId
CHECK ((RollingStockCategoryId IN (SELECT Id FROM FreightWagonTypes))
OR
(RollingStockCategoryId IN (SELECT Id FROM LocomotiveClasses)))
);
...but i get the following error:
*Cause: Subquery is not allowed here in the statement.
*Action: Remove the subquery from the statement.
Can you help me understanding what is the problem or how to achieve the same result?
