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Hi, Im stuck!
I habe a firebird database for which I am writing a VB.net frontend. Among others I have a table named tb_tags with the following collumns:
Tag;Tagtext;Tagtypeid
And a Table named tb_tagtypes with the collumns:
Tagtypeid;tagtypetext
I am filling a datagrid with the SQL command:
"SELECT a.tag, a.tagtext, b.tagtypetext FROM tb_tagtypes b join TB_tags a on b.TAGTYPEID = a.TAGTYPEID"
That works just fine!
Now I want, that the tagtypetext cell is a combobox with all the entrys of tagtypetext from the table tb_tagtypes. And that, according to what tagtypeid is stored in tb_tags, the right row of the combobox should be displayed when filling the datagrid.
Hope I made it clear enough, if not, I willtry my best to answer your questions.
Thanks,
Matthias
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So you already have the data you need to populate the combo in your code, extract a list of the tagtypes into another collection, possibly a simple string collection, and bind that to the combobox via it's data source.
Never underestimate the power of human stupidity
RAH
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This is my Query i want to implement paging where i will get the page size as a parameter from UI..How do i implement paging in this query..Plz any one Help..
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
-- =============================================
-- Author: <ragesh nair="">
-- Create date: <11/04/2012>
-- Description: <search>
-- =============================================
--exec iSRPDb_Sp_Search_WO 1,0,'0','T',10,1
--select * from tblProject where ProjectID=13849
--select * from tblProject where ProjectID=22412
--select * from tblProject where ProjectCode='B20904'
--select * from tblSubContractor where SubContractorID=88420
--select top 10* from tblWorkOrderHeader where ProjectID=22412
ALTER PROCEDURE [dbo].[iSRPDb_Sp_Search_WO]
@pBusinessUnitID as int=0,
@pProjectID as int,
@pSubcontractorID as int,
@pWONumber as varchar(10),
@PageSize as int
AS
BEGIN
SET NOCOUNT ON;
DECLARE @BusinessUnitFilter Varchar(255)
DECLARE @NameFilter Varchar(255)
DECLARE @SubConNameFilter Varchar(255)
DECLARE @WONumFilter Varchar(255)
DECLARE @Filter Varchar(2000)
DECLARE @StatusFilter VARCHAR(255)
DECLARE @PageNumber int
DECLARE @RowStart int
DECLARE @RowEnd int
DECLARE @condition varchar(255)
SET @StatusFilter=''
--if @PageNumber > 0
--
-- SET @PageNumber = @PageNumber -1
-- SET @RowStart = @PageSize * @PageNumber + 1;
-- SET @RowEnd = @RowStart + @PageSize - 1 ;
IF @pBusinessUnitID > 0
SET @BusinessUnitFilter = 'TWO. BusinessUnitID=' + Convert(Varchar(10),@pBusinessUnitID)
ELSE
SET @BusinessUnitFilter = ''
IF LTRIM(RTRIM(@pProjectID)) > 0
SET @NameFilter = ' AND TP.ProjectID =' + Convert(Varchar(255),@pProjectID)
ELSE
SET @NameFilter = ''
IF LTRIM(RTRIM(@pSubcontractorID)) > 0
SET @SubConNameFilter = ' AND TS.SubcontractorID =' + Convert(Varchar(255),@pSubcontractorID)
ELSE
SET @SubConNameFilter = ''
If ltrim(rtrim(@pWONumber))<> ''
Set @WONumFilter = 'AND TWO.WONumber LIKE ''%' + @pWONumber + '%'''
Else
Set @WONumFilter = ''
SET @FILTER =@StatusFilter + @BusinessUnitFilter + @NameFilter + @SubConNameFilter + @WONumFilter
exec('select
TWO.WONumber,
TS.Name AS SubcontractorName,
TP.ProjectCode,
TP.Description as ProjectName ,
TP.StartDate,
TP.EndDate,
ROW_NUMBER() OVER(order by TP.Description) as RowNO
from tblWorkOrderHeader TWO inner join
tblWorkOrderDetail TWOD on TWO.WONumber= TWOD.WONumber
inner join tblSubContractor TS on TWO.SubContractorID= TS.SubContractorID
inner join tblProject TP on TWO.ProjectID=TP.ProjectID
where ' + @FILTER)
end
--select * from tblProject where ProjectID=20101
--select * from tblSubContractor where SubContractorID=110244
--where (@subconid = 0 or @subconid = aa.subcontractorid)
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You don't say which SQL system this is, but assuming SQL Server.
I'd start at the basic, and use BETWEEN somehow. i.e. one of your WHERE clauses in the proc needs to be similar to:
WHERE [IDColumn] BETWEEN @StartID AND @EndID
Obviously @StartID and @EndID would be passed in.
Assuming IDColumn is an sequential and consecutive field this will return a defined number of rows.
In SQLServer 2008 (maybe 2005), they introduced RowNum (like Oracle), which would be more consistent, and wouldn't rely on an sequential field in the table.
That's where I'd start at least.
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Thank You For Your Response...AnyWay I Have FigureOut the Solution....After implementing Paging the SQL Server Query Looks Like this: I Have created a temporary table and inserted data to that table...and from there i calculated the pagenumber and size..the query will explain more..Hope this will help somebody... 
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
-- =============================================
-- Author: <ragesh nair="">
-- Create date: <11/04/2012>
-- Description: <search wo="" including="" paging="">
-- =============================================
--exec iSRPDb_Sp_Search_WO 1,0,'0','T',10,2
--select * from tblProject where ProjectID=13849
--select * from tblProject where ProjectID=22412
--select * from tblProject where ProjectCode='B20904'
--select * from tblSubContractor where SubContractorID=88420
--select top 10* from tblWorkOrderHeader where ProjectID=22412
ALTER PROCEDURE [dbo].[iSRPDb_Sp_Search_WO]
@pBusinessUnitID as int=0,
@pProjectID as int,
@pSubcontractorID as int,
@pWONumber as varchar(10),
@PageSize as int,
@PageNumber INT
AS
BEGIN
SET NOCOUNT ON;
DECLARE @BusinessUnitFilter Varchar(255)
DECLARE @NameFilter Varchar(255)
DECLARE @SubConNameFilter Varchar(255)
DECLARE @WONumFilter Varchar(255)
DECLARE @Filter Varchar(2000)
DECLARE @StatusFilter VARCHAR(255)
DECLARE @RowStart int
DECLARE @RowEnd int
DECLARE @condition varchar(255)
SET @StatusFilter=''
IF @pBusinessUnitID > 0
SET @BusinessUnitFilter = 'TWO. BusinessUnitID=' + Convert(Varchar(10),@pBusinessUnitID)
ELSE
SET @BusinessUnitFilter = ''
IF LTRIM(RTRIM(@pProjectID)) > 0
SET @NameFilter = ' AND TP.ProjectID =' + Convert(Varchar(255),@pProjectID)
ELSE
SET @NameFilter = ''
IF LTRIM(RTRIM(@pSubcontractorID)) > 0
SET @SubConNameFilter = ' AND TS.SubcontractorID =' + Convert(Varchar(255),@pSubcontractorID)
ELSE
SET @SubConNameFilter = ''
If ltrim(rtrim(@pWONumber))<> ''
Set @WONumFilter = 'AND TWO.WONumber LIKE ''%' + @pWONumber + '%'''
Else
Set @WONumFilter = ''
SET @FILTER =@StatusFilter + @BusinessUnitFilter + @NameFilter + @SubConNameFilter + @WONumFilter
CREATE TABLE #TempTable
(
RowNumber bigint ,
WONumber varchar(250) ,
Name varchar(250) ,
ProjectCode varchar(250) ,
Description varchar(250) ,
StartDate datetime ,
EndDate datetime
)
Declare @Query as nvarchar(max)
set @Query=''
set @Query= 'INSERT INTO #TempTable
select
ROW_NUMBER() OVER(order by TP.Description) as RowNumber,
TWO.WONumber,
TS.Name AS SubcontractorName,
TP.ProjectCode,
TP.Description as ProjectName ,
TP.StartDate,
TP.EndDate
from tblWorkOrderHeader TWO inner join
tblWorkOrderDetail TWOD on TWO.WONumber= TWOD.WONumber
inner join tblSubContractor TS on TWO.SubContractorID= TS.SubContractorID
inner join tblProject TP on TWO.ProjectID=TP.ProjectID
where ' + @FILTER+'order by TP.Description'
PRINT @Query
Exec sp_executesql @Query
select * from #TempTable
WHERE RowNumber BETWEEN (@PageNumber - 1) * @PageSize + 1 AND @PageNumber * @PageSize
ORDER BY Name ASC
SELECT count(*)
FROM #TempTable
drop table #TempTable
select @Query
END
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If you are fanatic about normalization, I am sure you know the pains associated with it. Deletion of a row at a top level table can become a project very quickly due the child tables dependencies, which can run several levels deep.
I have a script to do that. Please feel free to download and share.
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If it's so good and useful, please write an article.
And if you run into that problem often I recommend using referential integrity.
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I was going to curse you out but then saw that you are a legend at The Code Project, so I won't.
> Write an article: Yes the link is kinda article and the script itself.
> I recommend using referential integrity
I hope you are not confusing "on delete cascade" feature in the context of referential integrity.
Referential Integrity: NICE
On Delete Cascade: BAD (VERY BAD actually)
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jujiro wrote: "on delete cascade"
No, I use that very seldom and only when the data is transient anyway.
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jujiro wrote: On Delete Cascade: BAD (VERY BAD actually)
I use DELETE and DELETE CASCADE where the model requires me to do so. I find it good practice to limit the number of RI keys I'll define on a table so that I don't get into messes where all for the sake of normalization, someone has defined a row with a couple of dozen RI keys in it. To me that's just asking for a coding nightmare.
Chris Meech
I am Canadian. [heard in a local bar]
In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]
posting about Crystal Reports here is like discussing gay marriage on a catholic church’s website.[Nishant Sivakumar]
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jujiro wrote: Deletion of a row at a top level table can become a project very quickly due the child tables dependencies, which can run several levels deep.
"Cascading delete". Most modern databases do.
Bastard Programmer from Hell 
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Yeah and most experienced devs DON'T use it. I do not recall ever using cascade delete. I do recall chastisiing a junior dev for trashing the database using cascading delete. Oops just does not cut it!
Never underestimate the power of human stupidity
RAH
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Mycroft Holmes wrote: Yeah and most experienced devs DON'T use it.
They rather write queries to check whether there are child-rows, and delete them manually. I understand that people don't use what bites them - about the same brilliant idea as keeping every field a VARCHAR.
It's standard functionality of the database, and it's less error-prone than coding it manually.
I bet you're glad that I'm not allowed near your systems? 
Bastard Programmer from Hell
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Eddy Vluggen wrote: I understand that people don't use what bites them
You may well be right there, the idea of cascading deletes just makes my toes curl.
Eddy Vluggen wrote: I bet you're glad that I'm not allowed near your systems
You are most certainly right there, I could see endless discussions where each tries to justify their OPOV - fruitlessly.
Never underestimate the power of human stupidity
RAH
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If an article is too much then a tip/trick requires less commitment.
If you can't keep track of your data structure during development then there is something lacking in your methods. Referential integrity via FKs usually meets most of the requirements!
Never underestimate the power of human stupidity
RAH
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>> If an article is too much then a tip/trick requires less commitment.
I don't understand what you mean by that.
Anyway, the reason why I developed the script is to see how deep the rabbit hole is. Yes, I can use any reverse engineering ERD tool to see that (Visio is my favorite.) If you have been around as long as I have and have worked on projects where no one really knew the entire system/database, you have to rely on quick and dirty tools like my script to find your way. Visio may or may not be there at your disposal.
I really do not understand why people are making smart ass comments about how they do things. Col. Jessep (A few good men) said, "I have neither the time nor the inclination to explain myself to a man who rises and sleeps under the blanket of the very freedom I provide, then questions the manner in which I provide it! I'd rather you just said thank you and went on your way."
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jujiro wrote: you have to rely on quick and dirty tools like my script to find your way.
This shows there is something wrong with the environment, if you are going in having to build cascading deletes with no reference to the data structure then it is wrong. Not that we have not all had to do it but in a reasonable application you should not have to.
I did not even look at your script/solution, my point was that the way you are approaching it is wrong, this thread will dissapear into the pits fairly rapidly, writing an article will make your contribution more useful, but even a tip/trick will have a more lasting usefulness than a link in a forum post.
Never underestimate the power of human stupidity
RAH
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My point in the message to you was that people started writing comments without even clicking on the link. You click on the link you get some more information, may be not a whole lot of explanation, but information it is.
Now, about my approach: There could be myriad of reasons why you would want to know the relational linkages. May be you, you were doing a data cleanup, which meant deleting the parent rows, and keeping the child rows by making the foreign key column null, or may even delete cascading, if that is what was needed as a part of the cleanup process.
So, unless you know the context, you can say an emphatic "wrongful approach."
Do you get my point?
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jujiro wrote: So, unless you know the context, you can say an emphatic "wrongful approach."
No no no not the approach you took with the code, I never even looked at it, the wrong way to PRESENT it here. There are always requirements for hacks and workarounds, I was not dumping on your code, just the way you presented it!
Never underestimate the power of human stupidity
RAH
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There are two store procedure on same DB server:
create procedure usp_A
as
declare @ShiftName as datetime
select @ShiftName=getdate()
select * from LineConfig where Cur_PlanQty_0=0
GO
create procedure usp_B
as
select * from LineConfig where Cur_PlanQty_0=1
GO
I use follow sql want to get the union record sets
select * from openrowset('sqloledb','trusted_connection=yes','abc.dbo.usp_A')
U N I O N ALL
select * from openrowset('sqloledb','trusted_connection=yes','abc.dbo.usp_B')
get the follow error message:
Could not execute query against OLE DB provider 'sqloledb'. The provider could not support a required property. The provider indicates that conflicts occurred with other properties or requirements.
OLE/DB provider returned message: Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done.
if I remove the usp_A the local variable operation sentence:
select @ShiftName=getdate()
the error message disappear.
if I add new sentence such as:
declare @ShiftValue as varchar(10)
the same error message display again.
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Don't UNION on an OpenRowSet. Import it into a local (temp) table, and union from there. That way you'll also see which of both procedures is failing.
Bastard Programmer from Hell
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I have to insert the temp record into a temp table in order to resolve the issue at last.
But I think I have a lot of user store procedures to compute record sets. Do I have to create a lot of temp tables? Is it a bug or some mis-understand by me?
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Zhenjie Fu wrote: Do I have to create a lot of temp tables?
Nope, only for the two tables that you're importing with the OpenRowSet-command.
Zhenjie Fu wrote: <layer>Is it a bug or some mis-understand by me?
It's an error in one of the imports. Hence the suggestion to select those two first into a temporary table, and then to union on those.
Bastard Programmer from Hell
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I am trying to retrieve the product, price, and date_despatched for the last three orders (date_despatched) for each product.
There are two tables involved:
opheadm (Sales Order Header)
date_despatched
order_no
opdetm (Sales Order Detail)
order_no
product
net_price
Desired Result
product_a 2.999 2012/03/23
product_a 2.600 2012/02/01
product_a 3.812 2012/01/23
product_b 1.456 2012/04/01
product_b 4.786 2012/02/13
product_b 2.563 2012/10/10
...
I have seen two approaches, but cant get either to work (since in this case there needs to be a join on the header and detail tables)
a) OVER PARTITION BY (below is nowhere near correct - just to show example)
SELECT product_code, price, date_entered
FROM (SELECT ROW_NUMBER() OVER (PARTITION BY product_code ORDER BY date_entered DESC) AS OrderedDate,* FROM opdetm ) AS ordlist
WHERE ordlist.OrderedDate<=3;
b) SELECT.. WHERE IN (SELECT TOP n...)
SELECT E.scheme_opdetm.product, scheme_opdetm.net_price, opheadm.date_despatched
FROM scheme_opdetm, scheme_opheadm AS E
WHERE E.date_despatched IN (SELECT TOP 3 E2.date_despatched from scheme_opdetm, scheme_opheadm AS E2 WHERE E.product = E2.product Order by E2.date_despatched DESC)
ORDER BY E.product, net_price DESC;
Questions:
a) Which approach is best? Why?
b) Please could someone assist with the query I need, and if possible a short explanation of how to construct this type of query and what the different parts do. I'd like to try to understand what I'm diong as opposed to just copying someones SQL
Thanks in advance
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Take a look at this:
CREATE TABLE Opheadm (date_despatched date, order_num int)
create table opdetm (order_num int, product VARCHAR(100), net_price money)
INSERT INTO Opheadm values
('3/23/2012', 4),
('2/1/2012', 3),
('1/23/2012', 2),
('1/25/2011', 1)
INSERT INTO opdetm values
(4, 'prod_a', 2.99),
(3, 'prod_a', 2.60),
(2, 'prod_a', 3.80),
(1, 'prod_a', 1.20)
SELECT top 3 a.product, a.net_price,
ROW_NUMBER() Over(order by b.date_despatched DESC) AS RowNum
from opdetm a
inner join Opheadm b
on a.order_num = b.order_num
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