Cursor for updating records

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Solution: One way to do it is with a cursor which will update the rows.Another way is to write a SSIS package which uses a loop container.This is a complete book on PL/SQL with everything you need to know to write efficient and complex PL/SQL code.The goal is to manipulate the data in a way that the Value column has iterative values from 1 to 50 instead of just values of 1.To begin with we'll declare a couple of variables and set their default values.The first variable will hold the running total of Oscars while the second will be used to read each individual film's Oscars as the cursor moves through the record set.In these type of situations, it is ideal to use a Update Cursor, than using the default read only one.

The employee deletion from the transaction table is performed using the WHERE CURRENT OF clause as shown below.Once we open a cursor having a FOR UPDATE clause, all the rows returned by the SELECT statement are locked for our changes until a commit or a rollback is placed to release the lock.After a TCL operation is performed, the cursor pointer gets reset and the cursor will be no longer accessible, thus results in an error when fetched further as shown below.Thus, any TCL operation on the cursor record set has to be done only after fetching all the rows from the cursor context area using a loop process similar to the above listing example.The row limiting clause introduced in the Oracle version 12c, Fetch First ..

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