SQL Server :: Table Joins And Datasets To Bind The Gridview In Page
Mar 25, 2011
I have a web service with a dataset and I need to fill a gridview in my web page with data from multiple tables (like 4). How can I retrieve data from my 4 tables and construct a datatable with a table adapter in the dataset? I need to create this in the web service to bind the gridview in my page. In SQL I create a view with the joins of the 4 tables and added the view to the dataset. It works fine, but for other windows in my web page I need to use like 8 trough 10 tables (just to retrieve one field of each one) and I don't know if making that huge joins is the more efficient way to retrieve data from the server. There is another way to make joins? (Make separate queries for each table and create one table in memory) How?
I have a web page with a GridView and a table outside the gridview to display more information of the record when it is selected (like record details). I'm using data of five tables for this particularly window. I use one table of the five to bind the gridview the other tables are for the details, but I use like 1 or 2 fields of those tables. I'm binding the page with web services. I need some advice on which is the better way for doing this to make a faster web page.
In sql server I made a view with the five tables (all the tables relations are working perfectly). In the web service I call the view; and in the web page I call the web service to bind the page. Everything is working. All I want to do is retrieve from the server all the necessary data only once when the page loads and bind the five tables data (like 18 fields total) in the gridview which I only show 12 fields the other 6 fields are hidden, those 6 are for the details which I get with jQuery (that's another topic). Bind everything only once and manage the data on client side. Everything is working perfectly. Here is my doubt.
How are the maximum table joins I can make? To retrieve the data via web and not get a server time out error. Which is a better way to make a faster page? Make 2 views one for the gridview and one for the details and put each view in a web service; or make one view with all the table joins and one web service. Right now all is working but I have to make other pages that use different tables and joins and I don't know if the server gets me the time out error when the page is fully working.
Inner Join:- Returns a row when there is matching table in both tables. we can use comparison operator like =,<,>,<>
I created two tables
TableA
ID OID Type
1 1 A 2 6 B 3 7 C 4 10 D
TableB
ID Value 1 10 2 30 3 40 5 60 6 70
Basic Inner Join select Type From TableB as a inner join TableA as b on a.ID=b.OID Result Type
A B
If i want only the type which has not match in tableB then i can use not in subquery i get the result if i m using select Type From TableB as a inner join TableA as b on a.ID<>b.OID then i get
I need to display a header and details. What's the recommended way to do this? 2 separate datasets/tables, or 1 dataset with 2 datatables in it? I can't get the second set of data to display.
I have a select statement. I need to get a field value from the first statement. GOAL: Below is what I am trying to accomplish - the code below is not correct - Please modify the statement with the correct SQL Syntax. I want to query a table and based on the results I want to set the "If THE Else"statement to query then table with diffent inner joins.
SELECT * FROM CONTENTITEM CI INNER JOIN CONTENTCATEGORY CC ON CI.CATEGORYID = CC.CATEGORYID IF CI.FORMTYPE = 200 OR 300 SELECT * FROM CONTENTITEM CI INNER JOIN CONTENTCATEGORY CC ON CI.CATEGORYID = CC.CATEGORYID INNER JOIN CONTENTFORMFIELD CF ON CF.ITEMID = CI.ITEMID WHERE CI.ITEMID = @ITEMID ELSE SELECT * FROM CONTENTITEM CI INNER JOIN CONTENTCATEGORY CC ON CI.CATEGORYID = CC.CATEGORYID WHERE CI.ITEMID = @ITEMID
One of my peer wrote a query based on multiple tables using joins. One of the table is in a different database The query was taking much time
1. Create an SP 2. Create a temp table and copy all records from the external db 3. Avoid using Left Join as much as possible and use Inner Join 4. Create and use indexes 5. Remove tables/columns that are not necessary
In this scenario, I would like to suggest to use Covering Index, but how can it be created for multiple tables and a temp table?
I have tried to query a table with an xml column by using XQuery and I can't get the Select to work.
All my knowledge/understanding of the subject comes from this MSDN article:
[URL]
so I am probably overlooking something minor:
I tried this query Select col1, Phone.Query('element CellPhone {I am not sure about what goes here} I tried {data('Phone/cellPhone} from aTable Where Phone.Exist('/Phone/cellPhone/text()[contains.,"412-8977"]') = 1 This syntax is definitely not fun.
How to link multiple DataSets (why SSRS call it a DataSet even there is only one bunch of data fields in it) using keys, then put data fields from multiple DataSets into one Data Region? The reason I have to do this is: There will be 6 major DataSets to be used together few times in same report, it is not make sense to build a huge Matrix for all of them together. (in some data region I use data from dataset A and B, some times I use data from dataset A and C, D ...)
I want to bind gridview with datatable in this dt ihave 4 columns , dt
Id Name isdelete value 1 xyz true 2 uio false 3 bbb true 4 ccc false
this is gridview
[Code]....
but i want not bind those rows whose isdelete coumn value is false and i want to show 4 th column as textbox and user will enter some text or number and if he click save button outside of gridview one record shld save in database
I need to bind my gridview using data table. Here is my code
Dim dt As New DataTable dt = GettblClaimBL(Empid, ClaimYear) Me.grdvapplication.DataSource = dt Me.grdvapplication.DataBind()
In GettblClaimBL is a class where will connect it to the database (stored procedure using data set)
This code is in the SelectedIndexChanged of a dropdownlist. The Empid and Claimyear ia paramater that needed in my stored procedure, it will populate the gridview base on the dropdownlist.
How to bind a GridView Column to a public method in a Page. I have done this before but forgot the syntax. Basically the DataSource has a column named "EndDate" and based on value of the enddate i want show some text in column.
I have a user controlThe user selects some items from user control (check box list)User clicks update button on user control The new rows get updated on a gridview on calling page & user control is hidden
a)I have made the user control but I dont know how to return the results and bind them with gridview on my calling page.
b) Update: If I create the update button outside the user control and on my calling page and then on its button click event Isomehow access user control checkbox list selected items would that be a good approach ? And how to do this stuff ?
i am using ajaxtoolkit:combobox and i tried to bind data to this control in code behind file.but it is taking 3 to 4 mints to bind data and display the page. I am providing my aspx code and code behind code here
[Code]....
Code behind code: [Code]....
GetPrograms() method will return almost 6000 records. to load the control it is taking almost 4 minuts..
