id in oracle code example

Example 1: oracle create table auto generated primary key

-- For oracle 12c or later 
-- auto inc
create table t1 (
    c1 NUMBER GENERATED by default on null as IDENTITY,
    c2 VARCHAR2(10)
    );
-- More options for initial value and increment value
create table t1 (
    c1 NUMBER GENERATED ALWAYS as IDENTITY(START with 1 INCREMENT by 1),
    c2 VARCHAR2(10)
    );

Example 2: pl sql create table identity column

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sql-> CREATE Table sg_atts (
id INTEGER GENERATED ALWAYS AS IDENTITY
(START WITH 2 
INCREMENT BY 2 
MAXVALUE 200 
NO CYCLE),
name STRING,
PRIMARY KEY (id));
Statement completed successfully
sql->