Updating database from dataset vb net
If the statement does exist in memory, Oracle Database can reuse it and skip the task of parsing and optimizing the statement.
Using bind variables makes the statement reusable with different input values.
Bind variables are placeholders inside a SQL statement.
When a database receives a SQL statement, it determines if the statement has already been executed and stored in memory.
One way to fill a Data Set with multiple tables is to send the database multiple requests. If you do try to update all the tables with the same Data Adapter, then you will get an error like the one below (this error really frustrated me for a couple hours): An unhandled exception of type 'System.
Another way to do this is to use multiple SELECT statements in a single request. Invalid Operation Exception' occurred in dll Additional information: Missing the Data Column 'Date' in the Data Table 'Fee Charge Attendance' for the Source Column 'Date'.
The following section will show you how to test updating, inserting, and deleting the data.
As you can see from listing 5-48, I created a filled Data Set and created a new Data Row using the Data Table. After creating a Data Row, I set its column values and called the Data Adapter's Update method and displayed data in the Data Grid.
I added new rows to the Customers table with Customer Id, Customer Name, and Company Name (named Tst ID, Lana Jackob, and Mindcracker Inc., respectively). Adding data using a Data Adapter's Update method Listing 5-49 shows an example that edits row data.
I am having a problem updating an access database with new information from an updated dataset.
the database consists of 4 columns: User_ID, Login_Name, Password, Access. Startup Path & "\test.mdb" Public contest As New Ole Db.