DataSource Controls :: No Of Tables And Columns In Database?
Jun 15, 2010I want to know that how many tables we can have in database and what is the maximum no. of columns.I also want to know the maximum size for each datatype.
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Similar Messages:
DataSource Controls :: Columns To Join Tables?
Apr 27, 2010I need to join some tables to get the matching records. I often have to ask around to see how certain tables could be joined. Is there any way to query the information schema or some thing else to see what columns/values match in certain tables in order to figure out how tables should be joined.
View 4 RepliesDataSource Controls :: Adding Columns To The Tables In The DB Dynamically?
Jun 30, 2010Dim AlterTable As String = "alter table [Upload] add [Country] nvarchar (50) default 0 NOT NULL,[Address] int default 0 NOT NULL"
Dim connection As Data.SqlClient.SqlConnection
connection = New Data.SqlClient.SqlConnection()
connection.ConnectionString = ConfigurationManager.ConnectionStrings("ASPNETDBconnectionString1").ConnectionString
Dim cmdUpdating1 As New Data.SqlClient.SqlCommand(AlterTable, connection)
cmdUpdating1.CommandType = CommandType.Text
connection.Open()
cmdUpdating1.ExecuteNonQuery()
connection.Close()
This is the code which I am using for altering the number of columns in a table in the DB. so with this code i am able to add new coulmns dynamically. Now my major requirement in this is to obtain the headercount from the user( say "telephone number" and "language") and based on it generate the columns dynamically in the table in the DB.
DataSource Controls :: Statement To Combine Columns Of Different Tables
Feb 4, 2010I have 2 tables and I want to entries of the tables into something like this:
Table 1: Table 2: End Result:
a 1 a - 1
b 2 a - 2
... ... b - 1
... ... b - 2
... ... ...
DataSource Controls :: Sum Data From Two Columns In Different Tables - SQL Query
Feb 9, 2010I am trying to create an application in which there is a summary of outstanding payments.
One table is Table_Bills.
The other table stores records of Payments made and is called Table_Payments.
In summary i want to show 3 figures - each in separate one field datagridview with a data_source in separate data_adapter:
1) Ammount_Due 2) Amount_Paid 3) Balance.
The first two are no problem but the last is giving me a headache.
I tried this:
SELECT SUM(DHB_New_Jobtable.DayWage) - SUM(DHB_Payments.Ammount) AS Expr1
DataSource Controls :: Removing Duplicates From Two Similar Columns Or Any Other Columns In A Database Schema
Apr 21, 2010I have two columns first name and last name , that have duplicates, how can i remove the duplicates and only leave the distinct members intact?
View 6 RepliesSQL Server :: Database With Less Number Of Tables And More Columns
Sep 28, 2010What would you all suggest a database with less number of tables and more number of columns or more number of tables with less number of columns. I am developing a web application using Visual stuio 2005 and Sql Server 2005
View 2 RepliesSQL Server :: Search Word In All Tables / Columns Of Database
Sep 15, 2010I am developing the Home page of a Client. Apart from various things on this home page I have a text box and search button. Having said that, I have a database in which I have almost 12 tables with varying number of columns. Now my question is,Is there anyway to search a word typed by a user in the textbox to search it in all the tables(all columns) of the database.
View 2 RepliesADO.NET :: How To Create A Table Which Is The Combination Of Different Columns In Database Tables
Jan 12, 2011How to create a table which is the combination of different columns in database tables.
I know how to make the var table using single table.
What is I have to combine multiple coolumns and create a table.
My requirement is a gridview which has a datasource which is loading from columns from multiple tables.
Columns Of Two Related Database Tables In One GridView With EntityDataSource
Feb 17, 2010I have two SQL Server tables with Primary Keys (PK) and a Foreign Key (FK) linking the two tables:
1) Table "Order"
OrderID, int, PK
AddressID, int, FK
...
2) Table "Address"
AddressID, int, PK
City, nvarchar(50)
...
Then I've created an (ADO.NET) Entity Data Model out of those two tables. Now on my (ASP.NET) webpage I put a GridView with an EntityDataSource. In my GridView I want to display two columns:
OrderID City (belonging to that order and linked by the AddressID-key) How can I do that? My problem is: When I configure the Entity Data Source I can select an "EntitySetName" which can be either "Order" or "Address" but not both, nor can I select any kind of relationship. If I select "Order" as EntitySetName
then in the GridView I can add the columns
OrderID
Address
Address.AddressID
Adding the column "Address" displays empty cells. Adding "OrderID" and "Address.AddressID" displays the expected IDs. But how can I add the "City" of the related address to my GridView? Edit: Clarification:
The Entity Framework has created a class "Order" and a class "Address" corresponding to the database tables. The class "Order" has a reference to an "Address" object as a navigation property, corresponding to the 1-n relationship between Address and Order table. Basically I want to have a column in my GridView which displays Order.Address.City. I have tried to add a bound field with "Address.City" as data field to the GridView but it results in a runtime error ("no such property...").
DataSource Controls :: Restore Deleted Tables From SQL Database
Apr 3, 2010i am using sqlserver 2008 express.
i have a problem here, unfortunately i deleted "Manually" some important tables from my database, now i need to retrieve those tables,
i didnot take a backup for those tables,
can i retrive those tables or roll back delete process?
DataSource Controls :: Uniquely Extract Tables From Database Schema?
Jun 11, 2010I am looking for a fast way (either by script or Query statements) that would enable me uniquely extract some tables from my database schema.
The tables I wish to extract have some unique columns like x and y coordinate columns and i want to extract only the tables that have these coulmns in them.
My database schema is very large with 100s of tables that i cant just go through the tables one by one.
DataSource Controls :: Importing Excel Records Into MySql Database Tables
Mar 18, 2010My prob Is I have Excel files in my folder i need to Store the Records into Database Table. iam using VS.2005,c#.net,Asp.net ,Mysql 5.0
View 1 RepliesDataSource Controls :: Unique Columns In A Northwind Database
Apr 6, 2010im creating a database that needs a unique constraint on columns. does anyone know how to add this within the northwind database?
View 4 RepliesDataSource Controls :: Dynamically Adding Columns To A Table In The Database?
Jun 29, 2010I wanted to know if it is possible to dynamically add columns to a table in the Database?I know how to create a table dynamically in the DB the code for it is given below, howver I do not know, how do I add columns to it dynamically.
Dim NewTable As String = "CREATE TABLE Dynamic " +
" (" +
" job_id smallint" +
" IDENTITY(1,1)" +[CODE].....
DataSource Controls :: Refer To Datatable Columns With Database Column Names?
May 28, 2010[Code]....
Refer to datatable columns with database column names?
DataSource Controls :: Search Various Database Columns Based On User's Input?
Nov 18, 2010I have five textboxes(tb1, tb2, ... tb5) on the page, each textbox represent a column in the database table.
I need to search the database table based on the text in the textboxes. User can either enter text in all five textboxes or none.
What's the best way to do a search?
I am thinking for one textbox(tb1), depends on if tb1.text is empty or not, I need to do 2 searches
[Code]....
for two textboxes(tb1 & tb2), depends on if tb1.text and/or tb2.text are empty or not, there are 4 combinations, so I need to do 4 searches
[Code]....
for three textboxes, there are 8 combinations,
Does that mean for five textboxes, I need to do 2 to the power of 5, 32 combinations, 32 if statements?
Forms Data Controls :: Hide All FK Columns In All Tables?
Apr 1, 2011I want to hide all FK Columns in all tables. I am using Asp.Net Dynamic Data 4.0.
I tried to use this code:
[Code]....
And then in List page template call:
[Code]....
But this does not work. If I set breakpoint in function GenerateFields it newer stops there.
Forms Data Controls :: Binding Gridview's Columns From Different Tables?
Jul 14, 2010I want to know the procedure of binding a gridview. but the condition is that thefre are three columns in this gridview. if I wud bind it from one table then it wud ok for me. but now I need to bind it from three different tables. onw column from one table, another from 2nd.. and so on.
View 5 RepliesForms Data Controls :: Trying To Generate A Grid View From Database, In One Of My Database Columns The Values Are 'y' And 'N'?
Jan 8, 2010I am trying to generate a Grid view from database, in one of my database columns the values are 'y' and 'N'. and i need to show this values in a check box .I tried to keep a check box in item template and tried to bind it, but could get much success.
[Code]....
C# - Create A Database That Can "add", "remove" And "edit" Tables And Columns?
Oct 19, 2010What would be the best database/technique to use if I'd like to create a database that can "add", "remove" and "edit" tables and columns? I'd like it to be scaleable and fast. Should I use one table and four columns for this (Id, Table, Column, Type, Value) - Is there any good articles about this. Or is there any other solutions? Maybe three tables: One that holds the tables, one that holds the columns and one for the values?
Maybe someone already has created a db for this purpose? My requirements is that I'm using .NET (I guess the database don't have to be on windows, but I would prefer that)
SQL Server :: Using BulkCopy To Map Columns In Tables
Nov 8, 2010using sql server 2005 and vb.net 2005. I am writing a console application to import a mass amount of data from a non-sql database table into a sql server database table. The destination db table (sql server) has fewer tables than the source db table so I need to map the columns. does anyone have an example of how to do this?
View 1 RepliesADO.NET :: Linq On Multiple Tables With Same Columns
Aug 17, 2010I have a partitioned db where several tables have the exact same structure. I'm able to query the tables using linq, but only by quering the individual tables 1 at a time and by using the explicit table name. For example at the moment, I have 8 tables so I have something similar to the following:
[Code]....
Is there any way, that based on a certain value (stringValue), I could determine which table to query and then code the linq query just once?
ADO.NET :: Compare Columns In Two Data Tables
Dec 3, 2010is there an easy way to compare two columns in two datatable to see if they match? I need to check if the values in column["x"] of datatable1 occur in column ["y"] of datatable2, without iterating through both tables (for each value in column of dt1, check column of dt2). I tried:
foreach (DataRow dr in dt1.rows)
if (dt2.rows.find(dr["x"]) but this checks the whole row and if finds an "x" in any column, "if" condition is true. I need to only check one column of dt2. Tables have different columns but the same primary column and that's what I need to check
C# - Pulling Out Different Columns From Tables Using LINQ
Mar 23, 2011I have two tables:
Entity
ID (PK), int
Name
Descrip
Users
ID (PK)
EntityID, int (this is not connected to Entity table)
Now I am using LINQ to pull the records which has a Entity.ID = something. Which will show me couple of records in my GridView. Here is my LINQ statement:
protected void Page_Load(object sender, EventArgs e)
{
string getEntity = Request.QueryString["EntityID"];
int getIntEntity = Int32.Parse(getEntity);
OISEntityTestingDataContext db = new OISEntityTestingDataContext();
//OISLinqtoSQLDataContext db = new OISLinqtoSQLDataContext();
var tr =
from r in db.Users
join s in db.Entities on r.UserID equals s.ID
where s.ID == getIntEntity
select new
{
//To Show Items in GridView!
};
GridView1.DataSource = tr;
GridView1.DataBind();
}
Now here I am getting an error mesg on 'join' The type of one of the expressions in the join clause is incorrect. Type inference failed in the call to 'Join What does that mean?