Updating the records in to the cursor
It is rare, indeed, to find a PL/SQL program that does not either read from or make changes to tables in a database.
The FOR UPDATE OF clause helps us in locking up the intended table rather all available tables.By using %ROWTYPE to declare the record, I also tell Oracle Database that this procedure the omag_employees table.If the database administrator changes the maximum length of the last_name column to 200, for instance, this procedure’s status will be changed to INVALID.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.PL/SQL makes it very easy to declare records that have the same structure as a table, a view, or the result set of a cursor by offering the %ROWTYPE attribute.
Suppose I have an employees table in an application that looks like this: CREATE PROCEDURE process_employee ( employee_id_in IN omag_employees.employee_id%TYPE) IS l_employee_id omag_employees.employee_id%TYPE; l_last_name omag_employees.last_name%TYPE; l_salary omag_employees.salary%TYPE; BEGIN SELECT employee_id, last_name, salary INTO l_employee_id, l_last_name, l_salary FROM omag_employees WHERE employee_id = employee_id_in; END; (Note that I use suffixes in my parameters to indicate their mode.
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.
It also takes a look at record types, which enable you to work with records that are not necessarily related to a relational table.
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.
The Oracle PL/SQL language was designed to be a portable, high-performance transaction processing language that is tightly integrated with the SQL language.
In the below example, the cursor CUR is associated with a SELECT statement having the tables EMPLOYEES and joined in its FROM clause. EMPLOYEE_ID clause in the below snippet locks up only rows of the EMPLOYEES table, thus making the DEPARTMENTS table available for modification to the other session users. For this, the cursor CUR is associated with a SELECT statement joining the EMPLOYEES and the DEPARTMENTS tables with a FOR UPDATE OF clause on the employee ID.