I need to write a query as follows which will be bound to a grid
select top 25 * from ErrTable Order by DateErrorad Desc
However, I need to write this query to return only 25 records at a time, but when a user clicks next it will display the next 25 most recent records from the db.
Being new to Linq and Entity Framework, I find myself struggling to write queries that are relatively simple in SQL. My latest challenge is how to write a query that pulls records from a master table and includes a column for aggregating data from related detail records. Let's start with this example:
List<Customer> list = (from x in Customer select x.Customer_ID, x.CustomerName).ToList();
Now I'd like to modify this so that I include a column indicating how many orders each customer has, where there is a one-to-many relationship between the Customer and Order entities. I suspect the solution might result in a List of an anonymous type rather than the List of Customer like my example, but that would be
i have a table for customer forecast with following fields.. customer, year, week, quantity. now i need to write the SP to retrive the records based on the from week,year and to week,year... like this... from 45th week of 2009 to 25th week of 2010. how can write the query...
B reports to A C reports to A D reports to A E reports to B F reports to B
and so on......
So, when A logins he should be able to see B,C,D(who are reporting to A) and also E,F(who are actually reporting to B and not directly to A)Please help to write such sql query.
auton=createsid(num) INSERT INTO Store_Information (sid,store_name, Sales, Date) SELECT store_name, Sales, Date FROM Sales_Information
in the baove i need to add the SID which is a no obtained from incrmenated function, how do i add itautono will contain the incremnet value which i need to add to sid column
I have an SQL 2005 db with a table named "industry_suppliers."
I've created a query to enable someone to search this table using 3 parameters.
The results need to be grouped by "product_description" (which is essentially a category). When displayed on an .aspx page, for example, the results need to look like this:
Apples
Acme Apple Company Bradbury Orchards Oranges A1 Citrus Company Belfast Growers, Inc Bradbury Orchards
Notice how "Bradbury Orchards" is repeated under both categories. This is the result I want, EXCEPT in cases where someone wants to filter the search results by category. Let's say someone wants to search just for apple suppliers. The problem I'm having is that any record that appears under apples will also get listed again under any other categories associated with that record. So, searching for apple suppliers, the results are this:
Apples Acme Apple Company Bradbury Orchards Oranges Bradbury Orchards
I'm having trouble figuring out how to revise my query to avoid this problem.
i have a table for customer forecast which contains customer, week number and quantit as columns. now i need to write query and list the week as column for each customer and each cell should have a quantity. how to write query for this using pivot logic. i dont want to use cursor.
So,my question is that why we basically use @ before the sql query.If I don't use @ before that then it again work fine (does not give any error), then what is need of using "@"?
Equivalent of recordset.Edit, Movefirst,NoMatch of vb6 in vb.Net? I want to fetch records from single table of database(Sql server 2005) and collect in collections. How can we do that by dataset and dataadapter ? We want to fetch not to display.
I am using multiple parameter for binding gridview. i used following code for binding.
string constr = ConfigurationManager.ConnectionStrings["connect"].ConnectionString; //string query = "select * from bug_details where (auditor_name=@auditor_name or @auditor_name='')and (datee=@date or @date='')and((datee between @from and @to) or @from='' and @to='')"; string query = "select * from bug_details where (auditor_name=@auditor_name or @auditor_name='')and (datee=@date or @date='')and(datee between (@from or @from='') and (@to or @to=''))";
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If I enter date in txtfromdate text box in will get record from particuler date and if i enter date in both the text box it will get records between these two date and one more two text box may be empty also. How can I achieve this...
MembershipUser m_user = Membership.GetUser(); DataTable dt = new DataTable(); dt.Columns.Add("SenderUser"); dt.Columns.Add("RcvUser"); dt.Columns.Add("Message"); foreach (ListItem li in lst_Users.Items) {
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I am calling "Application object" from above aspx page into web service page as below:
[WebMethod(EnableSession = true)] [ScriptMethod(ResponseFormat = ResponseFormat.Json)] public string WebMessage() { List<string> list = new List<string>(); DataTable dt = ((DataTable)HttpContext.Current.Application["Message"]);
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I want to know that the approach im using in Web service page to fetch top 5 messages from Datatable is correct or not? How to do that without using LINQ as I am using framework 2.0 ...
I am using following oracle query and using executescalar() to fetch data
sql = "select username from usermst where userid=2" string getusername = command.executescalar(); But It is showing me error "System.NullReferenceException: Object reference not set to an instance of an object" This error comes when there is no row exist in database for userid=2
I'm unable to fetch just one integer value using this LINQ-query. LINQ seems to return everything as IEnumerable but I don't want that. First query should return just one string value which is then used in another query. That one should return integer which is also return value for method:
public static long GetTableIdByTableName(string name) { var result = (from aTable in objScope.Extent<Table>() where aTable.Name == name select { aTable.Id }); return ??????????? }
I am facing a big problem with simple linq query.. I am using EF 4.0..
I am trying to take all the records from a table using a linq query:
var result = context.tablename.select(x=>x);
This results in less rows than the normal sql query which is select * from tablename;
This table has more than 5 tables as child objects (foreign key relations: one to one and one to many etc)..
This result variable after executing that linq statement returns records with all child object values without doing a include statement.. I don't know is it a default behavior of EF 4.0 . I tried this statement in linqpad also..but there is no use... But interesting thing is if I do a join on the same table with another one table is working same is sql inner join and count is same..but I don't know why is it acting differently with that table only.. Is it doing inner joins with all child tables before returning the all records of that parent table?
I have a SQL Data Source that displays records after going through the Query Builder and select "Test Query" yet when I save it, go back to the design mode and select View in Browser I get nothing but a blank screen.
The website is over half way done and the functionality for the blog is (except for adding posts) is already implemented and working correctlyI have a SQLExpress 2008 backendBlog posts are rendered on the page with full HTML markup within a label control.
All of the above is done and working. Though I am essentially new to creating websites with ASP.NET, CSS and SQL, I am sure that I could simply carry on and make a login page with some controls that would allow me to add records (blog posts) directly to the database on the host server. However, I am fearful of doing this because I know that malicious code can be passed in this way. Also, because of my lack of knowledge, the only way that I know of to pass the code from a control to the database is to disable validation for the page the control is on. Without a doubt I do not want to do that.
So what are my options for getting blog posts into the database? Is it safest for me to fully create the post in html and update a copy of the database that resides on my local machine? If I do it this way, how can I merge the records from the database on the local machine with the records on the remote server?
