Oracle / PLSQL: Cursor Attributes While dealing with cursors, you may need to determine the status of your cursor.
A.An implicit cursor is a cursor which is internally created by Oracle.It is created by Oracle for each individual SQL.A session contains a single implicit cursor which is defined automatically by PL/SQL.The cursor gets assigned to represent the execution of a statement whenever it is executed.
The following is a list of the cursor attributes that you can use. %TYPE Attribute.
30.) VARRAY stands for the variable-sized array. The best way of putting a CURSOR to use in a COBOL program is to make use of DECLARE CURSOR, which can be used either in procedure division operation or in working storage. Parameterized cursors cannot reference local variables. A package cursor is a cursor which you declare in the package specification without an SQL statement.
In this example, cursor_id must be used in the select statement because in_id is not within the scope of the cursor. in requires either a subquery or a comma-separated list of values, so no, you can't substitute a function that returns a collection.
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Summary: in this tutorial, you will learn about the PL/SQL VARRAY and how to manipulate elements of a VARRAY effectively.
it needs to return a collection, not a cursor): The %TYPE attribute lets you declare a constant, variable, field, or parameter to be of the same data type a previously declared variable, field, record, nested table, or database column. What is the purpose of cursors in PL/SQL? Difference between varchar and varchar2 data types? Unfortunately, my company is still running on Oracle9i Database, so I have started converting my cursor FOR loops to BULK COLLECTs. ; Code line 6: Opening the cursor. Mention the way of highlighting as well as putting a CURSOR to use in a COBOL program. ; Code line 3: Declaring lv_emp_name_tbl as table type of VARCHAR2(50); Code line 4: Declaring lv_emp_name as lv_emp_name_tbl type. Top 50 Oracle Interview Questions and Answers 1. I was very happy to learn that Oracle Database 10g will automatically optimize my cursor FOR loops to perform at speeds comparable to BULK COLLECT. Each cursor in Oracle has set of attributes which enables an application program to test the state of ... Guru99 Provides FREE ONLINE TUTORIAL on Various courses like Java MIS MongoDB BigData Cassandra. This Oracle tutorial was designed for the absolute beginners who have never worked with any relational database system especially the Oracle Database before.
Code line 7: Fetching the cursor using BULK COLLECT with the LIMIT size as 5000 intl lv_emp_name variable.
Packages are schema objects that groups logically related PL/SQL types, variables, and subprograms. Introduction to PL/SQL VARRAY. my answer was that indexes are useful for faster access to rows in a table, where as they can be disadvantageous when the table size is small and we use the index to get the data.
Portability : Oracle is ported to more platforms than any of its competitors, running on more than 100 hardware platforms and 20 networking protocols. A VARRAY is single-dimensional collections of elements with the same data type. If the referenced item changes, your declaration is automatically updated. An item declared with %TYPE (the referencing item) always inherits the data type of the referenced item.
Parameterized cursors can only reference its own parameters.
Implicit cursors are available for the purpose of handling all the queries related with oracle. The cursor can be made used for the purpose of handling various row – query associated with PL/SQL.