ARCHIVED_SEQ# column of v$ARCHIVE_DEST_STATUS is not being updated

Check and correct fal_client and fal_server system parameters at standby database:

alter system set fal_client= scope=both;
alter system set fal_server= scope=both;

Dataguard Swithover

switchover commands:

Prod Site:
ALTER DATABASE COMMIT TO SWITCHOVER TO STANDBY WITH SESSION SHUTDOWN;

Standby Site:
alter database commit to switchover to primary;
alter database open ;

Old Prod Site:
SHUTDOWN;
STARUP MOUNT;
alter database recover managed standby database using current logfile disconnect from session;

Identity (Autoincrement) Column on Oracle

You can do this by using a sequence and before insert trigger on oracle:

create table ABC (id int, data varchar2(200));

create sequence INCABC
start with 1
increment by 1
maxvalue 999999999999
minvalue 1
nocyclecache 10
order;

create or replace trigger ABC_IDENTITY
before insert on ABC
FOR EACH ROW
begin
select INCABC.nextval into :new.id from dual;
end;
/

However in order to insert table, all column names except "id" should be provided in insert statement like:

insert into ABC (data) values ('abc');

or a dummy value should be provided for "id" column:

insert into abc values('abc',5);

other case following error occurs:

SQL> insert into abc values('abc');
insert into abc values('abc')
ERROR at line 1:
ORA-00947: not enough values

sqlplus / as sysdba, ORA-01031: insufficient privileges

Follow following steps to correct problem:
1-) go to $ORACLE_HOME/rdbms/lib
2-) correct dba OS user group name in config.s file:
a) type "id" command in shell in order to get group name of your OS user
b)correct group name in config.s file. It is written just after the ".string"
.csect H.12.NO_SYMBOL{RO}, 3
.string "dbat"
# End csect H.12.NO_SYMBOL{RO}
.csect H.14.NO_SYMBOL{RO}, 3
.string "dbat"
# End csect H.14.NO_SYMBOL{RO}
c) run following commands to backup & compile:
mv config.o config.o.org
make -f ins_rdbms.mk ioracle

Note: sometimes dba OS dba group is correct in config.s file so you dont need to change anything and compile (next step) solves the problem.

Error: OiifbStackLayout: can't understand "FİLL LEFT TOP"

This error may occur while running oracle installer if LANG environment variable is set to tr_TR. When this problem occurs, you see curruptions on GUI screen. Running following command before running installer corrects the problem:

export LANG=en_EN