Is It Possible With Dynamic TSQL Query
Jun 3, 2010
I have very long select query which i need to filter based on some params, i'm trying to avoid having different stored procedures or if statements inside of single stored procedure by using partly dynamic TSQL.I will avoid long select just for example sake
select a
from b
where c=@c
or d=@d
@c and @d are filter params, only one can filter at the same time but also both filters could be disabled. 0 for each of these means param is disables so i can create nvarchar with where statement in it...
How do i integrate in here dynamic query so 'where' can be added to normal query. I cannot add all the query as big nvarchar because there is too many things in it which will require changes ( ie. when's, subqueries, joins)
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Jun 7, 2010
I hoping someone may be able to point me in the right direction for this. Basically Im writing an asp.net web control to dynamically display a set of data based on field data stored in the database.
I want the control to create a dynamic asp table from a set of data from the database, however I cant get my head round the query needed to order the data into a list that I can create a htmltable from (if that makes sense)
my data looks like this, where I have a field name, the order the corresponding control will be rended in, and the number of columns that control takes up in the asp table:
Id | FieldName | ColumnSpan | Order ...
-----------------------------------------
1 | UserName | 1 | 1
2 | FirstName | 1 | 3
3 | LastName | 1 | 4
4 | Email Address | 2 | 2
5 | DOB | 1 | 5
6 | Notes | 2 | 7
7 | Password | 1 | 6
8 | UserID | 1 | 0
I have made a couple of attempts at creating a stored procedure that accepts an integer representing the number of columns the table will have, with no real progress. I would like the query to return something like the following (if the input parameter was 2 (columns)) - where the fields are grouped into logical rows
row | FieldName | Order
------------------------------------
1 | UserId | 0
1 | UserName | 1
2 | Email Address | 2
3 | FirstName | 3
3 | LastName | 4
4 | DOB | 5
4 | Password | 6
5 | Notes | 7
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Aug 22, 2010
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[Code]....
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[code]....
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Jan 28, 2011
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Aug 24, 2010
I've a resultset that returns some 55 rows which is typically a dynamic query like [Select column_name from table_name where column = condition].
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Dec 4, 2010
I have this query for getting data through Entity Framework, which works today. Thing is, i want to create the query dynamically, i.e build it up in blocks, but i can't figure out how exactly to do it. I believe if i can somehow save one of the values that i retrieve in the beginning i can do it, but now i retrieve it twice (probably a bit slow as well? Unless the compiler fixes it before quering). Makes sense? Here is the LINQ:
[code]....
I.e based on if various variables have values.
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Sep 9, 2010
is it possible to make a Linq query dynamic in the following pseduo code (to show what I'm trying to do)
[Code]....
where a2 and a3 and a4 are being populated from user controls and only one will apply. So query is done by state, zip or by city, but not by more than one, so the other two would be null. So the operator is really "OR" but I haven't found anything on a "or" or "whereOr" operator.
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Jan 20, 2010
i have a query like this and its running correctly
SELECT CAST(REPLACE(LTRIM(RTRIM(SUBSTRING(P.Telephone, 2, LEN(P.Telephone)))), ' ', '') AS BIGINT)
FROM P INNER JOIN PCommunication ON P.ID = PCommunication.ID
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AND PCommunication.TypesID = '7667d187-5fe1-4aaf-9e31-79761561da58'
i am trying to use it with dynamic query like this but its not working
@query = 'SELECT CAST(REPLACE(LTRIM(RTRIM(SUBSTRING(P.Telephone, 2, LEN(P.Telephone)))), ''' ''', '''''') AS BIGINT)
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Mar 24, 2010
I recently encountered a problem when our project is derived to client. We used a single web page called default.aspx and passed parameters as querystring to load different webpages [URL]? p=232&q=90&id=3). But the client need a meaningful url [URL]. If we create each page for the client data we get millions of web pages and it is hard to create. Now we need to display dynamic data without passing querystring and they should look like individual webpages insted of a single webpage.
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May 20, 2010
I've a requirement that I need to read an excel sheet programmatically using asp.net/C# and write the data obtained into a mysql table.The excel sheet contains something around 50 columns and 2000 records.I am able to read the data from the excel sheet and store it in a dataset.I am using the following code to write the data into mysql table.
for (int i = 1; i <= myDataSet1.Tables[0].Rows.Count - 1; i++)
{
MySqlCommand cmd = new MySqlCommand();
for (int j = 0; j <= myDataSet1.Tables[0].Columns.Count - 1; j++)
{
paramset[j] = myDataSet1.Tables[0].Rows[i][j].ToString();
cmd.Parameters.AddWithValue("val" + j, paramset[j]);
}
cmd.CommandText = "Insert into faqimport
cmd.Connection=con;
cmd.CommandType = CommandType.Text;
int x=cmd.ExecuteNonQuery;
}
When I try to run the above code I am getting 'Unknown column 'val0' in 'field list'' error.I understand that i am manually creating the parameters val0,val1,val2.....instead I am creating them dynamically using the integer 'j'.But I do not want to create around 50 parameters to insert data into the database table.
Also is there a way i can get the column datatypes from the excel sheet in order to create a new table in mysql with the columns in the excel sheet?
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Jan 12, 2011
I have two text boxes for the user to enter UserName & First Name, both these fields are optional and not mandatory to fill.
once the user presses the Search button, i execute the following query to fetch matching records.
[Code]....
The problem is, in cases where User leaves both the textbox or one of the textbox empty/blank, in that case that particular field should be removed from where clause.
More like if something is entered then search for that particular record otherwise search for all the records.
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Jul 1, 2010
I want to create a search form for a table that has many columns. According to input criteria the query will have a where with conditions related to the columns selected or NONE. How can I create a dynamic query according to selected conditions ? is there an example on the net that I can use?
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Feb 11, 2011
I want to use "if statement" in Linq query. How can I do this situation?
For example:
if txtAge.Text=="", I will not use that in Linq Query.
else txtAge.Text!="", I will use that in Linq Query.
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Dec 24, 2010
I m facing some problem. i m not passing Dynamic string through query string..
I m using this code
string abc = "CPCB_" + TextBox1.Text + "_" + TextBox2.Text;
Response.Write("<script>window.open('xml.aspx?Flag=3&date='+abc,target='new');</script>");
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Jul 1, 2010
Is it possible to use dynamic query filters with a gridview using a stored procedure as a data source? What I'm thinking of is a search page where there are multiple controls to enter in a search string and a radio button for the AND/OR query filters between the various controls. If not, what would be the best way to allow a user to select an AND / OR with a group of different query controls?
Here is the page I have created thus far using a view and no AND/OR option. I but I can't get it to work with my SP, also listed below:
[code]....
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