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When we execute this stored procedure, after inserting the record, it returns the Personal Detials Id value of last inserted record.
The second part shows that you can insert into the table, as long as the identity column isn't used in the insert statement. declare 2 r t%rowtype; 3 begin 4 := 42; 5 := 'world'; 6 insert into t values r; 7 end; 8 / declare * ERROR at line 1: ORA-32795: cannot insert into a generated always identity column ORA-06512: at line 6 In short: updating a "Generated Always Identity" column is not allowed either.
One final remark: an identity column is not the same as a primary key.
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In the first section the table is created with a "Generated Always Identity" column.