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I want a create a constraint such that if value of cola='Y'
then value of colb cannot be null.Please help
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to my knowledge this can be done only using trigger.
Regards
KP
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i have a table called loginfo in the server which is sql server is windows authenticated . i have user account in the server and if i have to connect to the server(loginfo) via an application do i have to give my uerid and password to the connection string ? how far is this secure..
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Hi all,
I want join in 5tables in my sqlserver database.
How I join 5tables,empno is a primary key for all tables.
thanks
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select *
from
tab1 inner join
tab2 on tab1.empno=tab2.empno inner join
tab3 on tab2.empno=tab3.empno inner join
tab4 on tab3.empno=tab4.empno inner join
tab5 on tab4.empno=tab5.empno
where
1=1
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hi amraouf
Thanks for your reply,
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hey i am trying to make a select query on a dataset
with the .select() method which equals
to the following lines writen in sql:
select *
from CA_ORDERS
where SUPPLIER in
(
select sup_name
from SUPPLIER
where SUP_RELATION = 'Drop shipping' )
well i may say i dont know the specific format of the .select() method
on datasets , cause it seems to be diferent from SQL lang.
how can i implement the 'IN' Filter?
Net
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Do you mean DataTable.Select() ? This link describes available syntax: Expression Syntax[^]
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hi
i want to be able to give the user the option to select either Top 10, Top 20 or Top 30 from a result set.
In my page they select from a drop down list and it must produce the graph accordingly, I would like to make 'Top' figure to be a variable so i only have to do one stored procedure.Not one for each Top 10, Top 20 or Top 30.
Is this possible?
Or do i have to create a stored procedure for each and then just call the appropriate procedure in my code?
Thanks
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You can have a stored procedure which builds dynamic sql according to user input and executes it. There can be an easier and/or more convenient way but I'm not aware of.
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Giorgi Dalakishvili wrote: There can be an easier and/or more convenient way but I'm not aware of.
I don't think there is. He can just have a parameter into the stored proc to specify how many top values he wants to retrieve. That would be my approach.
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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Paul Conrad wrote: He can just have a parameter into the stored proc to specify how many top values he wants to retrieve. That would be my approach.
I also thought about that but top clause doesn't accepts variables, you can only specify integers
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I forgot about TOP not allowing any variables.
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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Just found out that in sql server 2005 TOP supports variables so you can write a parametrized sproc.
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That is interesting, because I tried and it complained that it wasn't valid.
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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Did you put braces around the variable?
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I just tried and it works! Wow, I learned something new today 
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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Paul Conrad wrote: Wow, I learned something new today
I also learned something new 
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Okay, so as far as I understand it, having variable SQL queries in a stored procedure (except the obvious WHERE clause exception) is generally a good way to screw up the execution plan... So, seeing your responses to the question, why didn't you just do the following? I'm using the Northwind Database as the test DB.
CREATE PROC TestIdead @number smallint
AS
if @number = 10
begin
select top 10 * from Customers
end
else if @number = 20
begin
select top 20 * from Customers
end
else if @number = 30
begin
select top 30 * from Customers
end
In hindsight, you could probably reduce the IF...ELSE stuff down to a CASE statement as well... Just wondering why you opt for dynamic SQL queries rather than a logic structure that would result in a faster executing stored procedure (because the queries are static and thus don't modify the execution plan)?
I'm a bit new to SQL and stored procs, so please enlighten me.
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You don't need all those IF...Else stuff. Here is a sproc which works for all possible values
<br />
CREATE PROC TestIdead @number smallint<br />
AS<br />
select top (@number) from Customers<br />
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hehe... Unfortunately, I can't test that as I'm running against an SQL2000 server... and my SQL needs to be backwards compatible so... No variables in TOP statement for me!
Also, you didn't answer the question: Will the stored procedure I wrote run as fast or faster than the solution which uses the dynamic SQL query?
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use this:
create spTest ( @top int)
as
begin
declare @text nvarchar(500)
set @text = 'select top ' + @top + ' from table where 1=1'
sp_executesql @text
end
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in my application i create seperate logins for each user and user in db , is this ok for in the performence wise and what if i use one common lolgin and create users in the db is this more efficient than the first one.
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prasadbuddhika wrote: use one common lolgin and create users in the db is this more efficient than the first one.
I have gone this route many of projects and have had no ill-effects from it.
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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thanks,
is this means that i won't get any sort of db exception or error while many users are trying to access the db at the same time ?
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