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You don't say what technology you are using for the application as that may offer you different choices.
For example, if it's Java you could look at JavaDB, or HSQLDB (H2), or DB4O. Or, if you don't need a full-fledged database you could simply serialise your objects out to disk (or maybe use the built-in XMLEncoder class). I think DB4O might also have .NET support as well, I'm not sure.
For C or C++ you have SQLite among others.
Python also supports SQLite, and also has various options like pickle, shelve, gadfly.
SQL Server Express might actually a reasonable choice: it can be used embedded from a number of different languages and it is free (as far as I am aware if you are using it embedded in a single user application there are no licensing costs). FireBird is also an option for this sort of thing if you don't like SQL Server for whatever reason. I would say Access is not a bad choice for a stand-alone single user system, I would not agree that it is "not being used much anymore". I've seen several .NET applications that use it internally as a local data-store on a user's PC.
FoxPro is a complete all-in-one database and development environment (I haven't seen it in years myself but as far as I am aware it is still going strong with an army of loyal fans).
Or if all else fails you could simply write the data out to a text file on the disk in some sort of structured format. If your application is small and data volumes will be low, that might be the easiest option. If security is a concern you will need to work something out to encrypt the data.
I guess the short answer is, "It depends..."
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I think it boils down to a choice between Access and SQL Server Express.
Off the top of my head here's some factors to consider.
Access pros: self contained, built in form designer, query wizards, reports designer etc. Can use VBA to enhance functionality.
Access cons: cost money (unless you already have Office Pro), can be slow over networks (even LANs). Not as extensible as SSE - but not an issue for home use.
SSE pros: 'proper' database. Easily extensible. Lots of help on internet/MSDN forums.
It's a free download. Good performance on networks.
SSE cons: need a front end (VB.NET Express or C#? - both free) to construct forms etc.
Needs a bit more management than Access.
There are also some free/open source databases you might consider (e.g. SQLLite) but I'd avoid MySQL because it's fairly heavy duty so probably over the top for what you need.
Regards
David R
---------------------------------------------------------------
"Every program eventually becomes rococo, and then rubble." - Alan Perlis
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The program "MSAccess" costs money, but you're not required to purchase the GUI 
I are troll
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SQL Server Express is free, just like MySQL. Both are database-servers, usefull if you want to work with large amounts of data. Oracle 10g Express would be the third option if you require a "real" database.
SQLite, SQLCE and MSAccess are good options for smaller databases. MSAccess has been around for some years, and the drivers are usually found on most systems. What's more; Access-databases can contain reports (fully integrated with Office, viewable in MSWord) and you can use the MSAccess-runtime to show them.
SQLCE is relative new, feels faster and more stable than MSAccess. It doesn't have embedded reports, and the drivers are probably not installed on the host-machine.
I haven't used SQLite intensively, so I haven't formed an opinion on that one yet. Seems to be a viable alternative for SQLCE though.
If you don't need an actual database, but still want to store "some" data, look at XML and LINQ-to-XML.
Hope this helps 
I are troll
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I may be wrong, but I think that LINQ-to-XML only works with .NET 3.5. Not many home users will have that installed yet. It requires a 250Mb download just to install the .NET 3.5 framework, which might be a problem for some people especially since this is just a small home-user app. ("Our new application is just 100K, which you can download and install in seconds... after you spend an hour and a half trying to download and install all this other garbage that you don't really want.")
SQLite is fast and has a very small memory footprint. That's its main advantage.
SQLite datatypes are a bit weird because you don't tell it in advance what the datatype of a column will be. SQLite figures it out itself dynamically. This is mostly OK but every now and again it can surprise you (among other things, SQLite thinks it's OK to store string values in a column intended for integers without warning, it will happily convert from floating point numbers to integers according to its own internal logic, and so on). Also, there is no support for date/time values. If you want to store these, you have to figure out your own solution.
The biggest potential problem is that it is a single user database. Every time you update something, it locks the entire database (yes, the entire database not just the table being updated). May not be a problem for this particular application if it's a small home-user app but SQLite does not scale in terms of number of users.
Personally, I don't like SQLite. It's popular with C and C++ people and some Pythonistas but I just don't see the point of using it when there are better lightweight databases available these days.
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You're right, that's a large download if you just want to save some application-data.
David Skelly wrote: SQLite datatypes are a bit weird because you don't tell it in advance what the datatype of a column will be.
Like I said, I haven't used it much just noticed that it converts all datetime values to string.
David Skelly wrote: The biggest potential problem is that it is a single user database.
That's also true for SQLCE. MSAccess has some more options, but isn't intended for this scenario either. They can however, be used as readonly-datastores by multiple users.
David Skelly wrote: Personally, I don't like SQLite
Me neither, but it is still an option that may be considered. I'd be using SQL Server Express
I are troll
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You could alsways try www.sqlite.org[^]
I don't speak Idiot - please talk slowly and clearly
I don't know what all the fuss is about with America getting it's first black president. Zimbabwe's had one for years and he's sh*t. - Percy Drake , Shrewsbury
Driven to the arms of Heineken by the wife
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Hi i want to split one large table into two. But here my problem is, i need to query from both the tables, which should give the data same as the parent table.
For example If the large table is like
COLA COLB
1 A
2 B
3 C
4 D
5 E
and if i split this into
FIRST table
COLA COLB
1 A
3 C
5 E
Second table as
COLA COLB
2 B
4 D
Now i want to query the two tables, so that i should give the value order by COLA. Result shold be like
COLA COLB
1 A
2 B
3 C
4 D
5 E
My small attempt...
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This should do the trick:
select cola, colb
from(
select cola, colb from table1
union all
select cola, colb from table2
) d
order by cola
But I don't see why you should split a table in two.
Wout Louwers
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Actually i have one billion records in this table all are logs from a server machine. But only some specific error logs are used to process. To get better performance i am planning to do the same
My small attempt...
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You'd be better off archiving out old records and properly indexing your main table.
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i am creating some reports by parsing the error logs in that tables. SO i need all the error logs in the table. That y planed to move irrelevant data.
The table is indexed...
Any other technique?
My small attempt...
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Look into partitioning the table by periods.
Never underestimate the power of human stupidity
RAH
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That also did.. Right now i have different partition files to keep data for this table
My small attempt...
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hello
Is there a SQL Profiler for Oracle? I want to do:
1. intercept any database/storedproc calls, examine parameters ..etc
2. identify performance bottleneck for example
Thanks
dev
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Check out the tools available from Quest for Oracle. The have great products.
http://www.quest.com/spotlight-on-sql-server-enterprise/[^]
If you need a consultant, I've got a great guy for you. He is a former Oracle employee (18 years), specializing in Oracle performance tuning. He has worked majic for me in the past. Email me privately and I will give you his contact info.
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I'm overworked, too exhausted and might actually be willing to hire extra help - this is what I am looking for (basically Oracle tuning and troubleshooting) ...
1. Use TOAD to intercept database calls, also stored proc calls, examine parameters etc.
2. Use TOAD to do performance monitoring
your email if interested in freelance job? I won't do this now, but will probably to set up external IP (buy new domain, hardware... etc and have my business which will happen next ... 2-3 months I hope, by then I can recruit your professional assistance and you can teach me the tricks remotely)
dev
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Keep posting your questions here and I'm sure the folks will help you out. 
Try this query for finding SQL statements that have more than 10,000 reads:
select disk_reads,sql_text
from v$sqlarea
where disk_reads > 10000
order by disk_reads desc
Oracle has a tremendous amount of views that you can use to find performance bottlenecks.
There are tons of books out there on the subject of Oracle tuning.
Good luck with your endeavors.
David
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I want to add more record to tblStaff. before add it i want to check if existing this iD...Please help me.
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declare
@Exists int
Select @Exists = count(*) from tblStaff where StaffID = @StaffID
If @Exists = 0
Begin
add record
end
Never underestimate the power of human stupidity
RAH
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This query has a better performance:
if not exists(select * from tblStafff where StaffID = @StaffID)
Begin
-- Add record
End
Wout Louwers
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i got half way through the reply and started adding additional bits, should have started again  .
Never underestimate the power of human stupidity
RAH
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first , i'm very thank for your help ... but can you tell me more detail ? can you give me some sample...i'm a new learner.
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