|
Assuming that you want to use either ID or description and not both (does not make sense) then the following will do the job with a conditional where caluse.
SELECT *
FROM TableName
WHERE (ISNULL(@CupID,0)=0 OR CupID = @CupID)
AND (ISNULL(@CupDesc,'') = '' OR CupDesc = @Cupdesc)
There are a number of variations on this, search for "conditional where clause"
Caveat, string too many of these together (5+) and SQL Server gets very cranky
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
SELECT T2.* FROM (SELECT TOP(1) Color FROM Cabinet WHERE Color='Yellow') T1 INNER JOIN Cabinet T2 ON 0=0
|
|
|
|
|
Hi All,
I am want to show records in hindi which is retrieve the data from ms sql database through repeater controls as user controls.Kindly request you to please give me a response as soon as possible.
Thanks.
Raghav
|
|
|
|
|
This is not related to DB. If your problem is storing Hindi text following is the answer:
Use a nVarchar or nText column and store data using N"Hindi text here". Your DB server should have unicode Hindi font to view it.
If your problem is displaying it in Repeater, try ASP.Net forum.
|
|
|
|
|
Good answer, my 5 
|
|
|
|
|
Thanks.
|
|
|
|
|
Hi to codeproject world!
i have a project with sql server 2008 which has a server and 5 client.
[i mean that the project i have written is running on 6 pc's(one server and 5 client)]
now my problem is when the client1 is editting a record ( for exm:- Id:12 , from table1 )
other 4 client and sever should not have permission to edit that record.
hint :
i send Id to sql and get record and then i start to edit. at that time i am not connected to sql..
|
|
|
|
|
Do you really mean that other clients won't be able to modify the record while it's under editing at some client or that if 2 clients modify the same record, the program can notice this. Typically it's the later choice.
The latter choice can be achieved using optimistic locking. Add a timestamp column (if SQL Server) to your table which will change every time the record is modified. Now always when updating or deleting, include the value of the timestamp column in the where condition. This way you'll notice if something has changed.
The first one can be done using locking. First you lock the record (for example using update), you keep the transaction open, make modifications in UI and then update again and if everything is fine, commit otherwise rollback. However there should never be UI conversations in the middle of a transaction. This will typically cause many problems. If you're not connected to the database, another process can hold the lock while editing is done.
There are of course several other possibilies and especially if you're talking about offline appplication then factors like how long time between connections how much modifications etc will affect the choice. If the amount of time between edit start and end is long then locking isn't a good choice.
|
|
|
|
|
Be very sure this is a real world issue, not just an excercise in theoretical design question on how to build a bulletproof data entry system. Over many years and some fairly high volume data entry apps I have never, not once, had to implement a locking structure to secure against simultaneous editing.
I once wrote a system that kept track of the occurrence of data conflicts to assess their impact. The tracking system ran for 3 weeks and recorded 2 incidents, on a very high volume travel booking system, some twat of a manger had predicted multiple conflicts every hour. When the cost of the tracking was factored in management discarded it.
So make sure you (probably some manager somewhere) are not just wasting your time on unrealistic problems.
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
Thanks in advance,
I Want to restore a SQL 2005 databse .bak file during setup while i am installing SQL Server in silent mode.
Any Suggestions.
SOFTDEV
Luck in life always exists in the form of an abstract class that cannot be instantiated directly and needs to be inherited by hard work and dedication.
|
|
|
|
|
Why not create a command script (or similar) which first calls the silent setup and after that the script to restore the database. To run the restore script, you could use the newly installed SQLCMD[^].
|
|
|
|
|
RESTORE DATABASE AdventureWorks2008R2
FROM DISK = 'd:\SQLServerBackups\sampleDB.bak'
WITH FILE=1,
NORECOVERY;
|
|
|
|
|
hi
i want to write a good app for schools to use in regeister student.
please help me to create a good database for that !
thanks for your helping ! ! ! 
|
|
|
|
|
|
sorry ! ! !
i want to design a database for school !
please help me !
|
|
|
|
|
You don't have to be sorry. The problem is that you haven't:
- given any usable information for/about the design
- showed anything you've already done
- pointed out a specific question
These forums are for getting help for example when you get stuck in a certain issue or don't understand a certain detail etc. People here won't hand over the code or database etc.
If you're a student it's important that you learn the tools and techniques you're given lessons in. This won't happen if someone else does the thinking for you.
I would suggest that you have a look at other questions in this forum. You'll quickly notice what is the best way to ask for help. I believe that if you explain yourself well and in detail and more importantly show that you've done some effort then you'll get quality answers.
|
|
|
|
|
ok
i'm student and i want to creat an App for my school.
i learned C# programing but i have problem in sql server .
i can't Normalization what i want !
if any body can to teach me how to create a good database for my school, I will be grateful
|
|
|
|
|
So you really ask:
PLEASE, MAKE THE COMPLETE DESING FOR ME
Look, it isn't this hard; you just have to think about relationships:
- you have *students* with Student_ID and other student related columns
- vou have *teachers* with Teacher_ID and other teacher related columns
- you have *courses* with Course_ID and other course related columns
them are your BASE tables
then you have a relation: which teacher can teach which courses
- *TeachCourse* with Teacher_ID and Course_ID and other columns (i.e Weekday/Time)
also, you have a relation: which student took what courses
- *StudCourse* with Student_ID and Course_ID, no other columns (initially) needed
Underlined columns are the primary keys for the tables
Beware this is just the basic work - you have to refine it for multiple years and so on
HTH
|
|
|
|
|
Oracle has a nice description[^] of the steps. 3NF is usually considered "normalized".
I are Troll 
|
|
|
|
|
Hi
I have a column where are values regarding to time. And In my query I want to add additional column where I will have delta between each record. So e.g. between one record and another remain 34 seconds. For this one I was trying to use DateDiff function, and compare my column with times to the same column but offset by one record. And there is the problem. It looks like date DateDIFF(seconds, column, [subquery]) and I have error that subquery return more than 1 value and it its not appropriate where are following; =, != or something like that.
Do you have any ideas? how to manage this problem?
Dnorus
|
|
|
|
|
If you use a subquery to fetch the previous (or next) record you must ensure that only 1 record is fetched. So this means that you have to be able to order the rows based on some column and take only the first, for example using TOP 1. So your query could look something like:
SELECT ...
DATEDIFF(seconds,
datecolumn1,
(SELECT TOP 1 datecolumn2
FROM YourTable a1
WHERE ...
ORDER BY datecolumn2 DESC))
FROM YourTable
WHERE ...
|
|
|
|
|
It isnt good solution. subquery returns one record for example first one. and Each record in datecolumn1 is compared to only one record from datecolumn2. I want to create some query that I will have data from datecolumn from ID 1 to 10, then create subquery to have data from the same datecolumn from ID 2 to 11, and then use datediff to obtain time delta between following records.
|
|
|
|
|
This is why I wrote WHERE ... inside the subquery. What you must do is to add necessary conditions into the subquery using correlation to the outer query. Since you didn't provide the query and the columns I'm just quessing the columns but try adding something like the following to the subquery
...
WHERE a1.datecolumn1 < a.datecolumn1
...
A1 is the alias for you table in the subquery and A is alias for your table in the main query.
|
|
|
|
|
Oh it is working;) thx.. but it is working for to long.... maybe another way?
something like:
....
Datediff(seconds, datecolumn, (Delete first row from datecolumn and add at the end null))
Is there any possibility to do that? Because now I have almost the same searching in main query and subquery, and I think this main issue for this long working.
|
|
|
|
|
If it's taking a long time, it's probably because for each row in the main query a scan is done to the table to fetch the previous/next row. If possible, can you add an index to the table for the column you're using in the subquery. If several columns are used in the subquery condition consider having more than one column in the index.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
