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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.This way, when and if the SELECT list of the cursor changes, the number and type of fields in the record will change accordingly and everything will stay in sync.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.Once you have declared a record in your block, you can both read and change the record’s value.You can do this at the record level or by referencing individual fields of that record, with the same dot notation used in SQL to refer to the column of a table.When the procedure is recompiled, the compiler will update the definition of the record in this procedure to match the table’s new structure.
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.
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).
The cursor FOR loop is a variation on the numeric FOR loop, which looks like this: The index is implicitly declared by Oracle Database as an integer and can be referenced only inside the body of this loop.
It underlies the Oracle APIs of popular languages and environments including Node.js, Python and PHP, as well as providing access for OCI, OCCI, JDBC, ODBC and Pro*C applications.
Tools included in Instant Client, such as SQL*Plus and Oracle Data Pump, provide quick and convenient data access.