Use of for update clause in oracle

Only rows that meet the search condition are updated. If you omit this clause, all rows in the table are updated. This statement updates the row that was just fetched. Example creates a table with correct employee IDs but garbled names.

Examples Example creates a table with correct employee IDs but garbled names. I found that Oracle acquired the row level locks on both cases. If you are dealing with a SELECT statement that returns relatively few rows and a tight inner loop, it is unlikely that there will be an appreciable difference between the two. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Collectives on Stack Overflow. Learn more. Asked 9 years, 5 months ago. Active 9 years, 5 months ago. Viewed 11k times. I have used two separate scripts to do the same thing i.

Then what is the difference in between two scripts? Which one is better to use? OPEN cur;. CLOSE cur;. 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. Error report —. ORA fetch out of sequence. ORA at line The row limiting clause introduced in the Oracle version 12c, Fetch First.. In this scenario, the cursor result set can be limited using the traditional rownum pseudo column.