DataSource Controls :: Checking Duplicate Rows In Tables W/o PK
Mar 12, 2011
I have 5 tables as follows
as it can be seen from diagram, I have one table ie.patientdetails with Pid as primary key and other 4 tables have pid which is foreign key related to Pid in patient details.
the problem is that when if a test data is filled for say patient with Pid as 1, the data is saved nicely in required tables
If i try doing that again for same patient then a duplicate is created in test tables with pid as 1.
How do I remove duplicate rows from a data table based upon a two column values;I want to pass in a Data Table and a column names and get the data table back with data rows where that columns value are unique.
I have a Data Table with Duplicate Rows i want to delete the duplicates rows based upon two column values if both columns values are there then Delete the row.
I have a problem where I would like to get a comma-separated list of items from a couple of tables as part of a set of results. All the searching I've done so far has produced results for dealing with one or two tables. I have four, and can't get my head around how to adapt the sql to deal with it.
Where Certificates is a comma separated list of Description + " " + FullLocation records. (What I'll actually do is add http:// and other html codes to make FullLocation a hyperlink, but I can do that.)
Table_Certificates ON Table_CastCertificates.CertificateID = Table_Certificates.CertificateID INNER JOIN
Table_CertificateFiles ON Table_CastCertificates.FileID = Table_CertificateFiles.FileID
WHERE (CastingID = 45)
SELECT output = @str
This actually gives all records in the for the specific casting, but I keep getting an error at the "=" in @str = COALESCE when I try joining it to another query to get each casting.
Maybe this could be a simple questino, but for me it's difficult to do this action: I have a table in sql server 2005 with some records stored, for example 10 records. The primary key of this table, let's call it "Employee", it's a number field with an autoincrement constraint. I want to store more data into the table by using a OdbcDataTable object and OdbcDataAdapter and adding new rows to the datatable and afeter that use the "Update" method from the OdbcDataAdapter object.
The big deal is this: let's suppose that I want a add a new record to the datatable object, using any method or code sequence that you want. if I have 10 records stored on the data base table, when I retrieve this table schema by using the OdbcDataAdapter "Fill" method, I have a copy of the data base table schema in the DataTable object, right?. if I add a new row on the datatable object, it's suppose that the primary key column of that table must AUTO-INCREMENT the value of the key, I mean if the last value that I store on the table was the number 10 on the PK field, when I add a new row on the datatable object, the PK value on the datatable object must be the number 11 if the autoincrement constraint is present into the DataTable object, but in my case, it doesn't work
So, How can I define the conditions or set the c# data objects properties to wor in that way???. In this moment the PK column on the odbcDataTable doesn't auto-increment its value when I add a new row on it.
Please helpe with this.
PD: I have another question about the DataTable object, how many records can store this object?? I have some problems with this because sometimes when I use the Fill() method to get data into the DataTable or a DataSet object there's no problem if the Fill() method retrieves about 142000 records, but when I retrieve over the 145000 records, when I inspect the DataSet or DataTable object by using the debuging mode, they have null value. Any of you can tell me why this situation ocurrs??
I need to check for duplicate records before inserting them into the SQL database.Thus I have the following codes:
For count = 0 To GridView1.Rows.Count If (GridView1.Rows(count).DataItem("Student Name").Equals(dtDataTable.Rows(count).Item("Student ID"))) Then lblMsg.Text = "Records Existed" End If
but there are error message. "Object variable or With block variable not set."
I have a program that parser html and collecting urls. The problem is when checking for duplicates before I add them to an arraylist is that I cannot distinguish between types of the following format:
While uploading excel sheet to datatable and bind it to gridview it will check the repeat data and null data in excel sheet and when it will bind to gridview, the row in which error present that row will be in red background color and the correct row will occur in normal back color.
I have a database table that stores a list of friends. The table can store many friends and there can be duplicates, for example - John is James' and davids' friend. John will be in the table twice but will be linked to the others via another data-member. What i dont want is james to be down as johns friend twice in the table. I'm doing a small social network and this is possible by james accepting john as his friend twice. Is there anything to check if there are 2 columns identical?
To what way student is useful Dropdownlist1(Good,Fair,Poor) When i select the Dropdpownlist1 in that select the Poor POPUP Screen will open. the POPUP Screen as follows Negative_Feed_Back Textbox1(In that textbox type the reason for Poor) OK (Button) When user click the OK (Button) the select dropdownlist and Remarks will be displayed in the gridview In gridview as follows Dropdown Remarks 0 Student performance is not good Suppose if user wrongly type the reason for poor want to change means in that case he can change reason for poor and click the ok button. In that case two Poor reasons are there in gridview as follows Dropdown Remarks 0 Student performance is not good 0 The Students not good at all in that case i want to delete the first First Row of the gridview. Output as follows Dropdown Remarks 0 The Students not good at all
When I run my above code shows error as follows Column 'Remarks' does not belong to underlying table 'Table1'. The above error shows in the below function as follows :
Referring [URL] .... its a good functionality but instead of removing duplicate rows i need to make the cell of the column containing duplicate value blank
I have 2two gridview .If i have load same data from two gridvie after that i drap and drop one ID one grid to another grid that time ID same means it will show alert match or it will show not match alert using jquery.
I am using the built in database with the tables (i.e. membership, users, etc...). I created my own table (relationships), but when I try to create a row that uses the same email address it says "cannot create duplicate entries". I am not allowing duplicate email addresses in the membership table. That did not work because I couldn't convert System.Guid to long. So, I decided to do it by email address. I changed idRequester to requesteremail and the same for receiver. However, when I try another record with the same email address in either field, it does not accept it.
I have one big DataTable with X rows. I want to select Y rows from it and bind them to a new ViewList. While doing it, I want to delete these rows from the DataTable (Having X - Y rows).
What is the best and fast way to do it?
I don't know if it is better to create a new DataTable to have the Y and after that bind them to a ViewList or something else?
I'm also looking for example in code how to select/delete rows from DataTable.
I want to check that the row index I specify is below the row count so it doesn't throw the error
Index 2 is either negative or above rows count.
how would I achieve this with my code?
Using connection As New SqlConnection(connStr) Dim command As New SqlCommand command.Connection = connection connection.Open() Dim a As New SqlDataAdapter("SELECT top(3) name, (SELECT TOP (1) ImageId FROM Images WHERE(productid = products.Id)) AS imageId FROM Products WHERE beginnerdiscount = '1' ORDER BY Dateadded", connection) Dim s As New DataSet()......
I have a transaction that has 5 update statements.I am checking that the data is the same as it was when i selected it before i change it, as this will be from a web app that many people could update.
I want to check that the rowcount is 1 everytime i make an update, if it is one then I want to move on, if not I want to rollback and return.
Here is what I have, only it it rolling back on the first attempt everytime.
[Code]....
I am not sure if rowcount is available yet, if not what do I need to use to find out if anyrows are being updated before moving on?
I'm getting duplicated rows of data showing up in my GridViews. I have two GridViews, each showing different data. I'm using SQL queries to retrieve the data from 2 database tables (1 query pulls from one table and the other query pulls from a second table, but references the first table in the WHERE clause). The GridViews were not duplicating data until after I added the Data Binding code to each GridView event handler and the button click event handler (outside of the GridView). I double checked my SQL queries by running them in TOAD and did not get any duplicated rows. So the issue is not with the SQL queries. It appears to be the GridViews causing it, or the Data Binding, or combination of those two, but I'm not sure what it is.Has anyone heard of or seen this? If needed, I can post my VB code and GridView code.
I have a datatable in which some of the rows contain a column with duplicate values. I need to be able to delete the duplicate rows and leave only one, doesn't matter which one.
The rows might look like this:
A, B, C, D E, F, G, D H, I, J, D
I need to delete two rows and be left with only one.
I'm currently working on a FOREX Live Trading project that I'm implementing.
I already have a database that stores the CURRENCY PAIR, BUY/SELL, PRICE AND QTY.
But I have a huge problem.
Scenario that is:
A person BUYS EUR/USD at a PRICE of 1.29900 @ quantity 100,000. (This will be recorded in the database table)
Then he BUYS EUR/USD at a PRICE of 1.29950 @ quantity 100,000. (This will then be recorded in the database also)
Then he decides to SELL his EUR/USD at a PRICE of 1.31000 @ quantity 200,000 all out. (How can I check from the database if he previously had make a transaction of BUY/SELL, so that I can do my necessary calculations for the P/L Statement)
I'm new to ASP.NET MVC and I'm trying to implement an address manager.I'm using Linq2Entity Framework. I've got a table with contacts and one with phone numbers. These two tables are linked by a contact_has_phone_number table. The Entity Framework enables me to get all phone numbers that are assigned to one contact. This is done by calling contact.PhoneNumbers which returns a collection of phone numbers.
an attribute or some other setting. I am exporting the contents of a gridview to an excel spreadsheet. And for the most part it works great, with one minor annoyance, the export duplicates the entire gridview. In other words this is what I get:
