Pl sql use cursor variable in update statement

Or you can select individual columns into separate variables instead of into a rowtype variable. But you have to get exactly one row or one row's worth of columns from the query; if there are no matches you'll get a no data found error, if more than one then too many rows. However, if you want to select and update the row, you probably do want a cursor with a select A simple update as you've got it now will be the most efficient way, whether you're updating one row or millions.

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 8 years, 8 months ago. Active 8 years, 8 months ago. Viewed 2k times. END I guess the cursor is only needed then if you want to perform a fetch of the updated row, is that right? Improve this question. Refers to the row of a table. Run time error. Exceptions can be classified into 2, ie Predefined exception and User defined exception.

Exception which is created by the user is called User defined exception. This should be declared in the declaration part and should be raised in the execution part. Cursor can be defined as a memory area in which the result of SQL statements is stored. There are two types of cursors, ie. Implicit cursor and Explicit Cursor. This will tell the database server to allocate memory space for the query which is to be executed.

Here the query actually gets executed, a result set is created and the cursor points to the first row. This attribute will return true if the cursor is already opened and false if it is not opened. This attribute will return the number of records that are fetched from the result set. In the case of Cursor For Loop, all you have to do is to declare the cursor. Opening, fetching and closing are taken care of by the For loop. This is a program which can be called from other programs Oracle itself, Java,.

This performs an action and it may or may not return a value. This will both receive values from the calling program and return the output value back to the calling program. After creating the procedure by running the above program , you may write a calling program. This performs a calculation and it should return a value.

This can be defined as a container for functions, procedures, exceptions etc. Before using an explicit cursor, you must declare it in the declaration section of a block or package as follows:.

Before start fetching rows from the cursor, you must open it. To open a cursor, you use the following syntax:. When you open a cursor, Oracle parses the query, binds variables, and executes the associated SQL statement. Oracle also determines an execution plan, associates host variables and cursor parameters with the placeholders in the SQL statement, determines the result set, and sets the cursor to the first row in the result set.

More about parameterized cursor in the next tutorial.