oracle - Alter table doesn't work [closed] - sql

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I find this mysql code and when i past it to oracle sql developer the alter table command show me an error when i'v tried to execute it.
this is my table:
CREATE TABLE article (
code varchar(20) NOT NULL,
designation varchar(100) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
num_serie int(50) NOT NULL,
num_reference int(50) NOT NULL,
num_inventaire int(50) NOT NULL,
tva double NOT NULL,
famille varchar(50) NOT NULL,
sous_famille varchar(50) NOT NULL
) ;
and this is the alter table command :
ALTER TABLE article
ADD PRIMARY KEY (code),
ADD KEY code (code),
ADD KEY code_2 (code);
this is the error message:
Rapport d'erreur - ORA-01735: option ALTER TABLE non
valide
01735. 00000 - "invalid ALTER TABLE option"
*Cause:
*Action:

Answer 1

Such a CREATE TABLE won't work in Oracle (at least, 11gR2). Therefore, I rearranged it a little bit (please, compare column by column yourself to see differences). Primary key constraint can be created inline (as I did), at the end of the columns' list (2nd example) or separately, using the ALTER TABLE (3rd example).
Note that you don't have to specify NOT NULL for primary key column(s); Oracle will enforce it itself.
SQL> CREATE TABLE article (
2 code varchar2(20) constraint pk_art primary key,
3 designation varchar2(100) NOT NULL,
4 num_serie int NOT NULL,
5 num_reference int NOT NULL,
6 num_inventaire int NOT NULL,
7 tva number NOT NULL,
8 famille varchar2(50) NOT NULL,
9 sous_famille varchar2(50) NOT NULL
10 );
Table created.
SQL> drop table article;
Table dropped.
SQL> CREATE TABLE article (
2 code varchar2(20),
3 designation varchar2(100) NOT NULL,
4 num_serie int NOT NULL,
5 num_reference int NOT NULL,
6 num_inventaire int NOT NULL,
7 tva number NOT NULL,
8 famille varchar2(50) NOT NULL,
9 sous_famille varchar2(50) NOT NULL,
10 --
11 constraint pk_art primary key (code)
12 );
Table created.
SQL> drop table article;
Table dropped.
SQL> CREATE TABLE article (
2 code varchar2(20),
3 designation varchar2(100) NOT NULL,
4 num_serie int NOT NULL,
5 num_reference int NOT NULL,
6 num_inventaire int NOT NULL,
7 tva number NOT NULL,
8 famille varchar2(50) NOT NULL,
9 sous_famille varchar2(50) NOT NULL
10 );
Table created.
SQL> alter table article add constraint pk_art primary key (code);
Table altered.
SQL>

Answer 2

You appear to be using MySQL syntax with Oracle. I would suggest:
CREATE TABLE articles (
code varchar2(20) NOT NULL PRIMARY KEY,
designation nvarchar2(100) NOT NULL,
num_serie number NOT NULL,
num_reference number NOT NULL,
num_inventaire number NOT NULL,
tva number NOT NULL,
famille varchar2(50) NOT NULL,
sous_famille varchar2(50) NOT NULL
) ;
With code declared as a primary key, there is no reason to create separate indexes on the column.