Reputation: 25
I am new to SQL.
I am trying to create a table:
CREATE TABLE account
(AccountNo NUMBER(2) PRIMARY KEY,
AccountType VARCHAR(1) FOREIGN KEY REFERENCES account_type(TypeCode),
CustomerRef NUMBER(2) FOREIGN KEY REFERENCES bank_customer(CustomerRef),
DateOpened DATE,
CurrentBalence NUMBER(6,2),
OverdraftLimit NUMBER(5,2));
However it comes up with: ORA-00907: missing right parenthesis I know for a fact that you can have to foreign keys, so that's not the problem. Could someone give me a had with the solution of creating the table?
Upvotes: 0
Views: 136
Reputation: 8797
There are two notations you can use when declaring constraints:
1) inline (a constraint):
CREATE TABLE account
(AccountNo NUMBER(2) PRIMARY KEY,
AccountType VARCHAR(1) REFERENCES account_type(TypeCode),
CustomerRef NUMBER(2) REFERENCES bank_customer(CustomerRef),
DateOpened DATE,
CurrentBalence NUMBER(6,2),
OverdraftLimit NUMBER(5,2));
2) out-of-line
CREATE TABLE account
(
AccountNo NUMBER(2) PRIMARY KEY,
AccountType VARCHAR(1),
CustomerRef NUMBER(2),
DateOpened DATE,
CurrentBalence NUMBER(6,2),
OverdraftLimit NUMBER(5,2),
FOREIGN KEY(AccountType) REFERENCES account_type(TypeCode),
FOREIGN KEY(CustomerRef) REFERENCES account_type(TypeCode)
);
In both cases you can prepend the constraint declaration with CONSTRAINT <name>
to give your name to a constraint, otherwise Oracle assigns its own name.
inline notation is applied to a column where the constraint is declared, out-of-line is applied to the table. There slight differences in syntax + some restrictions, for example you cannot declare out-of-line NULL constraint.
You can use inline and out-of-line syntax in CREATE TABLE and ALTER TABLE. Refer to Oracle documentation for more information
Upvotes: 1
Reputation: 15193
You need to define the foreign keys with REFERENCES
. In the below snippet, replace AccountTypeTable
and CustomerRefTable
with the correct table names and replace typeColumn
and refColumn
with the correct column names in those tables these match to.
UPDATE
I added in the correct values from your comment on another answer
CREATE TABLE account (
AccountNo NUMBER(2) PRIMARY KEY,
AccountType VARCHAR(1),
CustomerRef NUMBER(2),
DateOpened DATE,
CurrentBalence NUMBER(6,2),
OverdraftLimit NUMBER(5,2),
CONSTRAINT account_fk1 FOREIGN KEY (AccountType) REFERENCES Account_Type(TypeCode),
CONSTRAINT account_fk2 FOREIGN KEY (CustomerRef) REFERENCES Bank_Customer(CustomerRef));
Upvotes: 0
Reputation: 575
you are missing foreign key syntax...
CREATE TABLE account
(AccountNo NUMBER(2) PRIMARY KEY (P_ID),
AccountType VARCHAR(1) FOREIGN KEY (F1_ID) REFERENCES <table_name>(field_name>),
CustomerRef NUMBER(2) FOREIGN KEY (F2_ID) REFERENCES <table_name>(field_name>),
DateOpened DATE,
CurrentBalence NUMBER(6,2),
OverdraftLimit NUMBER(5,2));
Upvotes: 0
Reputation: 58
A foreign key actually has to refer to something. In your case you have to tell Oracle what AccountType and CustomerRef refer to. Usually it looks as follows:
AccountType VARCHAR(1) FOREIGN KEY REFERENCES TABLE_NAME(COLUMN_NAME)
Of course, you have to replace TABLE_NAME and COLUMN_NAME with the name of the table and the name of the column you're referring to.
Upvotes: 1