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Here Mudassar Ahmed Khan has explained how to use Sql Bulk Copy to insert bulk data from Grid View to database in ASP. Sql Bulk Copy class as the name suggests does bulk insert from one source to another and hence multiple selected rows from the Grid View can be easily read and inserted in SQL Server database table using the Sql Bulk Copy class. Here Mudassar Ahmed Khan has explained with an example, how to solve the following error (exception) that occurs in the Write To Server function when Sql Bulk Copy is used along with Sql Transaction class. Invalid Operation Exception: Unexpected existing transaction. Here Mudassar Ahmed Khan has explained with an example, how to Import (Insert) Excel file data into Database using Sql Bulk Copy in ASP. The uploaded Excel file data will be read using OLEDB library and the read data will be inserted into SQL Server database using Sql Bulk Copy.

Here Mudassar Ahmed Khan has explained how to add page numbers to existing PDF file using i Text Sharp in C# and VB. The pages of the PDF file will be read and then using the Pdf Stamper class page numbers will be written to each page of the PDF document. Sql Bulk Copy will be used along with the Sql Transaction class in order to perform Bulk Insert with Transaction i.e. Sql Bulk Copy class as the name suggests does bulk insert from one source to another and hence all rows from the Excel sheet can be easily read and inserted using the Sql Bulk Copy class.

Updating very large tables can be a time taking task and sometimes it might take hours to finish.

In addition to this, it might also cause blocking issues.

But if there are a large number of rows that require an update, then the overhead of issuing large numbers of UPDATE statements can result in the operation as a whole taking a long time to complete.

The traditional advice for improving performance for multiple UPDATE statements is to “prepare” the required query once, and then “execute” the prepared query once for each row requiring an update.

In addition to the clustered index update, the index ix_col1 is also updated.

I include it here because it allows us to compare the cost of context-switches to the cost of updates.

DECLARE CURSOR c1 IS SELECT * FROM test6; rec_cur c1%rowtype; BEGIN OPEN c1; LOOP FETCH c1 INTO rec_cur; EXIT WHEN c1%notfound; UPDATE test SET fk = rec_, fill = rec_WHERE pk = rec_cur.pk; END LOOP; CLOSE C1; END; / This is the simplest PL/SQL method and very common in hand-coded PL/SQL applications.

The UPDATE portion of the code works in an identical fashion to the Implicit Cursor Loop, so this is not really a separate "UPDATE" method as such.

The interesting thing about this method is that it performs a context-switch between PL/SQL and SQL for every FETCH; this is less efficient.

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