Question

I am using Oracle SQL developer to create a basic table with the following command:

CREATE TABLE chartered_flight(
   flight_no NUMBER(4) PRIMARY KEY
   , customer_id FOREIGN KEY
   , aircraft_no FOREIGN KEY
   , flight_type VARCHAR2 (12)
   , flight_date DATE NOT NULL
   , flight_time TO_DATE 'HH:MI' NOT NULL
   , takeoff_at CHAR (3) NOT NULL
   , destination CHAR (3) NOT NULL
)

Where is the missing right parenthesis? Or is the syntax that I have used incorrect.

I have made the following changes:

CREATE TABLE chartered flight(
   flight_no NUMBER(4) PRIMARY KEY
   , customer_id NUMBER(6) REFERENCES [customer]([customer_id])
   , aircraft_no NUMBER(4) REFERENCES [aircraft]([aircraft_no])
   , flight_type VARCHAR2 (12)
   , flight_date DATE NOT NULL
   , flight_time INTERVAL DAY TO SECOND NOT NULL
   , takeoff_at CHAR (3) NOT NULL
   , destination CHAR (3) NOT NULL)

Now I get this error:

Error at Command Line:1 Column:23
Error report:
SQL Error: ORA-00922: missing or invalid option
00922. 00000 -  "missing or invalid option"
*Cause:    
*Action:

I have a feeling it is something to do with TO_DATE or is it because I have not created my aircraft table yet so aircraft_no is missing? Can some one please help, thanks.

Answer 1

To specify foreign key constraint, you should either use inline customer_id [type] REFERENCES [master_table_name]([master_column_name]) or out of line syntax : , CONSTRAINT [constraint_name] FOREIGN KEY(customer_id) REFERENCES [master_table_name]([master_column_name]) See more example here. Also, it usually makes sense to add indexes on foreign key columns.

For flight_time you probably need to use INTERVAL DAY TO SECOND type