Plsql updating in cursor


Because only one exception can be raised at a time in a session, it doesn’t make any sense to allow you to check for two (or more) exceptions in a single handler.For full explanations of both of these answers, visit plsqlchallenge.com, register or log in, and click the Closed/Taken tab in Play a Quiz.Suppose I want to write a program to display the last names of all employees.An elegant and simple way to do this in PL/SQL is to take advantage of the cursor FOR loop (which I discussed in part 2 of this PL/SQL 101 series).Tables are made up of rows of data, each consisting of one or more columns, so it stands to reason that Oracle Database would make it as easy as possible to work with those rows of data inside a PL/SQL program.



Here’s an example: (Note that I usually add a “_cur” suffix to the names of my explicitly declared cursors.) Whenever you are fetching data from a cursor into PL/SQL variables, you should declare a record based on that cursor with %ROWTYPE and fetch into that record.It’s rare, in fact, that the data with which you are working is just a single value, so records and other composite datatypes are likely to figure prominently in your PL/SQL programs.This article explores how you declare records, populate them with rows from a table, and even insert or change an entire row in a table by using a record.The following block uses a cursor FOR loop to fetch only the last name of each employee, deposit that name into a record, and then display the value of the last_name field of that record: You can define parameters based on record types, and you can therefore pass records as arguments to subprograms.

Suppose I need to write a procedure that displays an employee.

PL/SQL offers special syntax in both the INSERT and UPDATE statements so that you can easily use records to perform those data manipulation language (DML) operations as well.



Plsql updating in cursor comments


  • How to update cursor records using WHERE CURRENT OF? - Stack. profil de paulette60

    paulette60

    How to update cursor records using WHERE. tagged oracle plsql cursor or ask your. 2. Counting records in a table and updating a table using a cursor.…