Re: Oracle SQL doubts

In article <8telac$vp8$1_at_mango.singnet.com.sg>,   "Kwok Ching Yuen" <cykwok_at_singnet.com.sg> wrote:
> Hi, recently I'm trying some SQL stuffs on Oracle8i personal ED.
>
> However, the following don't work:
>
> 1. The following statement won't work:
>
> CREATE SCHEMA NADIA_DB AUTHORIZATION NADIA;
>
> 2. Tried to create domain in oracle, but encounter error. Maybe
 Oracle don't
> support domains.
>
> CREATE DOMAIN PID_TYPE AS VARCHAR2(15)
>
> /***************/
> /* Oracle response */
> /***************/
>
> *
> ERROR at line 1:
> ORA-00901: invalid CREATE command
>
> Q1: Is it true that Oracle don't support the above features?
>
> Q2: I tried the following, but it doesn't work. May I know how to
 implement
> the "ON UPDATE CASCADE" and "ON DELETE NO ACTION" features for the
 foreign
> key?
>
> CREATE TABLE CUST(
> P_ID VARCHAR2(15) NOT NULL,
> S_LNAME VARCHAR2(15) NOT NULL,
> S_FNAME VARCHAR2(15) NOT NULL,
> S_BLOCK VARCHAR2(5),
> S_STREET VARCHAR2(20) NOT NULL,
> S_ZIP VARCHAR2(10) NOT NULL,
> S_CITY VARCHAR2(20),
> S_TEL NUMBER(15) NOT NULL,
> R_LNAME VARCHAR2(15) NOT NULL,
> R_FNAME VARCHAR2(15) NOT NULL,
> R_BLOCK VARCHAR2(5),
> R_STREET VARCHAR2(20) NOT NULL,
> R_ZIP VARCHAR2(10) NOT NULL,
> R_CITY VARCHAR2(20),
> R_TEL NUMBER(15) NOT NULL,
> PRIMARY KEY (P_ID),
> FOREIGN KEY (P_ID) REFERENCES PACK
> ON UPDATE NO ACTION /* This won't work*/
> ON DELETE NO ACTION /* This won't work*/
> );
>
> /***************/
> /* Oracle response */
> /***************/
>
> ON UPDATE NO ACTION
> *
> ERROR at line 19:
> ORA-00905: missing keyword
>
> Q3. How do I create a table with the time data type? I get the
 following
> error.
>
> CREATE TABLE FLIGHT(
> FLIGHT_NO VARCHAR2(10) NOT NULL,
> DEPART_TIME TIMESTAMP NOT NULL,
> ARRIVE_TIME TIMESTAMP NOT NULL,
> PRIMARY KEY (FLIGHT_N0)
> );
>
> /***************/
> /* Oracle response */
> /***************/
>
> DEPART_TIME TIMESTAMP NOT NULL,
> *
> ERROR at line 3:
> ORA-00902: invalid datatype
>
> Q4. If I need to create a table (weak entity) whose primary key is
 also a
> foreign key which references another table (strong entity), how do I
 do that
> in Oracle SQL?
>
> kumori.
>
>

Usually I try to avoid this, but as it is very clear you are using incorrect syntax, incorrect datatypes and so on, which problems could only arise from not

RTFM Also you should always post:
exact version, exact platform, *exact* error message.

Regards,

--
Sybrand Bakker, Oracle DBA

All standard disclaimers apply
------------------------------------------------------------------------


Sent via Deja.com http://www.deja.com/
Before you buy.