Question

Login Screen

Asked by: b3cf

Hi,
 I'm new to Oracle. I'm trying to create a login screen where someone enters his/her user name and password. The values entered are checked against a row in the password table.
If they are valid the options in the main menu are enabled.
Otherwise an error message is displayed.

I appreciate alot if someone could help me in doing this.
Thanx Dilantha

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Asked On
1998-12-22 at 11:15:12ID10110860
Topic

Oracle Database

Participating Experts
4
Points
100
Comments
4

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Answers

 

by: akumarvPosted on 1998-12-22 at 14:35:22ID: 1083437

Whatever client tool or language you hope to use for the Login screen you need to use SQL. Since you said there is a password table, the following sql should return an answer.

SELECT COUNT(*) into <integer variable> FROM <PASSWORD TABLE> where username = <value input in the user name field> and password = <value input in the password field>

If the <variable> has the value 1 then the user is a valid user else not and you can proceed with enabling the menu options.

 

by: petwgPosted on 1998-12-22 at 17:53:48ID: 1083438

what dev tool are you using?????   VB, developer 2000????!!!

pet

 

by: mlonnrotPosted on 1998-12-29 at 13:32:21ID: 1083439

You should use count(1) instead of count(*). Yields the same result but requires less parsing and resources.

 

by: frankrPosted on 1998-12-29 at 15:04:26ID: 1083440

This really comes under the heading of 'reinventing the wheel'.  The database supports the notion of accounts as a native part of the application.  Presenting a logon window is part of what the base toolset will automatically do for you when it's appropriate.

What you're suggesting is analogous to building an account system as a DOS application (DOS doesn't support the concept, so you have to build it if you want it).  Oracle supports the notion of accounts with some form of authentication - typically passwords, but others are supported as well.

Depending on how the application tool will connect to the database (ODBC or Oracle's SQL*Net product are typical), when a database connection is attempted, the app will invoke the logon window or whatever.

If you'd provide a few more details about the client-side environment, you could get some pretty specific how-to info on setting it up.

20120131-EE-VQP-002

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