Solved

Oracle Add a Column. Set Default Value to False

Posted on 2014-09-08
6
562 Views
Last Modified: 2014-09-08
I have a table named TableA. I need to add a column named Delete_Me.

The new column needs a default value of false.

Which is a better datatype choice, VarChar2(1) or Number defaulted to 0 ?

What is the syntax for creating the new column?

Thanks,
0
Comment
Question by:Dovberman
6 Comments
 
LVL 6

Accepted Solution

by:
Mandeep Singh earned 150 total points
ID: 40311336
alter table table_name
add (column1_name column1_datatype column1_constraint);

Open in new window


ALTER TABLE user ADD Delete_Me VARCHAR2(1) DEFAULT 'N' NOT NULL
0
 
LVL 48

Assisted Solution

by:PortletPaul
PortletPaul earned 150 total points
ID: 40311337
ALTER TABLE TableA
  ADD ( Delete_Me int default 0 not null ) ;

I would use an integer.
0
 
LVL 142

Assisted Solution

by:Guy Hengel [angelIII / a3]
Guy Hengel [angelIII / a3] earned 200 total points
ID: 40311361
well, you have this:
http://docs.oracle.com/cd/E17952_01/refman-5.1-en/bit-type.html
BIT(1) would be the correct choice...


TINYINT and CHAR(1) (and not VARCHAR...) will use up 1 byte
see here:
http://docs.oracle.com/cd/E17952_01/refman-5.5-en/storage-requirements.html
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 

Author Comment

by:Dovberman
ID: 40311367
is BIT(1) available in Oracle 10g?
0
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 40311375
I think it's only available from Oracle 11.2, but not sure...
0
 

Author Closing Comment

by:Dovberman
ID: 40311395
Thanks
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

How to Create User-Defined Aggregates in Oracle Before we begin creating these things, what are user-defined aggregates?  They are a feature introduced in Oracle 9i that allows a developer to create his or her own functions like "SUM", "AVG", and…
Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface.  I made a script to download the Alert Log, look for errors, and email me the trace files.  In this article I'll describe what I did and share my script.
This video explains at a high level with the mandatory Oracle Memory processes are as well as touching on some of the more common optional ones.
This video shows information on the Oracle Data Dictionary, starting with the Oracle documentation, explaining the different types of Data Dictionary views available by group and permissions as well as giving examples on how to retrieve data from th…

810 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question