Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Mailing Lists -> Oracle-L -> Re: BYTE OR CHAR LENGTH Semantics

Re: BYTE OR CHAR LENGTH Semantics

From: Norman Dunbar <norman.dunbar_at_environment-agency.gov.uk>
Date: Mon, 21 May 2007 13:50:45 +0100
Message-Id: <s651a3d1.025@environment-agency.gov.uk>

>> How to know whether a table column has been create using BYTE or CHAR
length
>> semantics?

Does this help :

SQL> create table norman(a_byte varchar2(100 byte),   2 a_char varchar2(100 char));

Table created.

SQL> desc norman;

 Name                                      Null?    Type
 ----------------------------------------- --------
----------------------------
 A_BYTE                                             VARCHAR2(100)
 A_CHAR                                             VARCHAR2(100 CHAR)

SQL> select column_name,char_length,char_used   2 from user_tab_columns
  3 where table_name = 'NORMAN';

COLUMN_NAME                    CHAR_LENGTH C
------------------------------ ----------- -
A_BYTE                                 100 B
A_CHAR                                 100 C


So, the CHAR_USED column in user_tab_columns is where to find out.

Cheers,
Norman.

Norman Dunbar.
Contract Oracle DBA.
Rivers House, Leeds.

Internal : 7 28 2051
External : 0113 231 2051

Information in this message may be confidential and may be legally privileged. If you have received this message by mistake, please notify the sender immediately, delete it and do not copy it to anyone else.

We have checked this email and its attachments for viruses. But you should still check any attachment before opening it.

We may have to make this message and any reply to it public if asked to under the Freedom of Information Act, Data Protection Act or for litigation. Email messages and attachments sent to or from any Environment Agency address may also be accessed by someone other than the sender or recipient, for business purposes.

If we have sent you information and you wish to use it please read our terms and conditions which you can get by calling us on 08708 506 506. Find out more about the Environment Agency at www.environment-agency.gov.uk

--
http://www.freelists.org/webpage/oracle-l
Received on Mon May 21 2007 - 07:50:45 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US