Before I used the user-defined table type, the stored procedure I relied on involved a cursor loop that took too long to execute, caused numerous deadlocks, and had a negative effect on database performance.With SQL Server 2008’s new user-defined table type, you no longer have to spend hours trying to figure out ways to update thousands of records.Figure 1 shows the results of the insert statement in Listing 3. The code at callout B declares the Data Table and sets the Data Grid View as this Data Table.
Basically, a table-valued parameter lets you use an array of data in T-SQL, as well as send an entire data-set table as a parameter in a stored procedure or function.
SQL Server 2008 stores this parameter as a user-defined table type.
The easiest way that I’ve found to insert numerous rows into the table type is through a . I then call the stored procedure to update the records. Although the process is a little slow, it eliminates the time I would spend on the task, which is more valuable to the company. Net application that accesses table-valued parameters, you create a new Windows Form C# Application and drag a Data Grid View onto the form (an Openfile Dialog), along with two buttons (Browse and Update) and a label. Listing 4: Code to Access Table-Valued Parameters using System; using System. Second, confirm that the text in Data Grid View is correct, as Figure 4 shows.
Click Update (at this point, you can add some error handling).
Finally, use the following code to verify that the values have been updated in the database. As you can see, it’s quite straightforward to use a .
Net application with table-valued parameters to update multiple field values in thousands of files.
First, with the code segment below, you create a new user-defined table type.
Second, you create a stored procedure with a table-valued parameter, as Listing 2 shows.
In previous versions of SQL Server, if I needed to update numerous rows of data, I used a temporary table.