Oracle pl sql cursor for update

The following statement creates a view that returns the sales revenues by customers:. Suppose you need to develop a anonymous block that:.

In the declaration section, we declare three variables. The following query retrieves data from the customers table to verify the update:.

As you can see clearly from the result, only the first few customers have the credit limits. If you sum up all credit limits, the total should be 1 million as shown follows:.

The cursor displays the name and salary of each employee in the EMP table whose salary is less than that specified by a passed-in parameter value. It is one of the core database programming concepts, which forms a basic unit of execution of SQL statement. A cursor is a pointer, which points towards a pre allocated memory location in the SGA. A ref cursor is a pointer to a result set. A ref cursor is also a cursor , though normally ther term cursor is used when discussing static SQL.

A cursor is a temporary work area created in the system memory when a SQL statement is executed. The set of rows the cursor holds is called the active set. Explicit cursors. With a cursor variable, you simply pass the reference to that cursor. A ref cursor is a variable, defined as a cursor type, which will point to, or reference a cursor result. The advantage that a ref cursor has over a plain cursor is that is can be passed as a variable to a procedure or a function.

This attribute is used to determine whether a cursor is in the open state. It causes the cursor to close 2. It loads the current row values into variables 4. It creates the variables to hold the current row values. All the rows are retrieved with only 2 context switches. Does anyone mind lending a helping hand? I want to allow a calling program to update a row in the cursor I want to update the race location returned by the query in my current code.

Here's my code so far:. 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 7 years, 10 months ago. Active 5 years, 9 months ago. Viewed 13k times. Improve this question. Still stuck on this if anyone's wondering : — user Oracle 3?