Working with Cursors in Oracle PL/SQL

Q

Where to find answers to frequently asked questions on Working with Cursors in Oracle PL/SQL?

✍: FYIcenter.com

A

Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Working with Cursors in Oracle PL/SQL. Clear answers are provided with tutorial exercises on defining, opening, and closing cursors, looping through cursors, defining and using cursor variables.

What Is a Cursor in Oracle

Types of Cursors Supported in PL/SQL in Oracle

What Is the Implicit Cursor in Oracle

Attributes of the Implicit Cursor in Oracle

Loop through the Implicit Cursor in Oracle

Define an Explicit Cursor in Oracle

Open and Close an Explicit Cursor in Oracle

Retrieve Data from an Explicit Cursor in Oracle

Retrieve Data from a Cursor to a RECORD in Oracle

Use FETCH Statement in a Loop in Oracle

Use an Explicit Cursor without OPEN Statements in Oracle

Open Multiple Cursors at the Same Time in Oracle

Pass a Parameter to a Cursor in Oracle

What Is a Cursor Variable in Oracle

Define a Cursor Variable in Oracle

Open a Cursor Variable in Oracle

Loop through a Cursor Variable in Oracle

Pass a Cursor Variable to a Procedure in Oracle

Cursor Variable Easier to Use than Cursor in Oracle

Sample scripts used in this FAQ collection assumes that you are connected to the server with the HR user account on the default database instance XE. See other FAQ collections on how to connect to the server. It is also assumed that you are using SQL*Plus to practice the tutorial exercises.

⇒ What Is a Cursor in Oracle

⇐ Define a Variable to Match Column Data Type in Oracle

⇑⇑ Oracle Database Tutorials

2018-02-01, 3312🔥, 0💬

What Is the Implicit Cursor in Oracle
What Is the Implicit Cursor in Oracle? There is only one implicitly cursor in a session. The implicit cursor is the cursor automatically defined by PL/SQL for you. Whenever a SQL statement is executed, this cursor will be assigned to represent the execution of this statement. This implicit cursor is... 2018-02-01, 3045🔥, 0💬

What Is a Cursor in Oracle
What Is a Cursor in Oracle? A cursor looks like a variable, but it is not a variable. A cursor looks like a procedure, but it is not a procedure. A cursor is a cursor. It is a logical representation of a resource connects to a set of data rows related to a DML statement. A cursor is consists of: A D... 2018-02-01, 3005🔥, 0💬

Insert a RECORD into a Table in Oracle
How To Insert a RECORD into a Table in Oracle? If you have a RECORD variable with data fields matching a table structure, you can insert a row to this table with this RECORD variable using the INSERT statement as shown in the example below: CREATE TABLE emp_temp AS SELECT * FROM employees; CREATE OR... 2018-08-14, 2875🔥, 0💬

Attributes of the Implicit Cursor in Oracle
How To Use Attributes of the Implicit Cursor in Oracle? Right after executing a DML statement, you retrieve any attribute of the implicit cursor by using SQL%attribute_name, as shown in the following tutorial exercise: CREATE TABLE student (id NUMBER(5) PRIMARY KEY, first_name VARCHAR(80) NOT NULL, ... 2018-02-01, 2858🔥, 0💬

Types of Cursors Supported in PL/SQL in Oracle
How Many Types of Cursors Supported in PL/SQL in Oracle? PL/SQL supports two types of cursors: The implicit cursor - A single default cursor that automatically connects to the last DML statement executed. Explicit cursors - User defined cursors with specific DML statements and execution statuses. ... 2018-02-01, 2849🔥, 0💬

Update a Table Row with a RECORD in Oracle
How To Update a Table Row with a RECORD in Oracle? If you have a RECORD variable with data fields matching a table structure, you can update a row in this table with this RECORD variable using the UPDATE ... SET ROW statement as shown in the sample script below: CREATE TABLE emp_temp AS SELECT * FRO... 2018-08-14, 2840🔥, 0💬

Define a Variable to Match Column Data Type in Oracle
How To Define a Variable to Match a Table Column Data Type in Oracle? If you have a table, and want to define some variables to have exactly the same data types as some columns in that table, you can use table_name.column_name%TYPE as data types to define those variables. The tutorial sample below s... 2018-08-14, 2762🔥, 0💬

Assign a Table Row to RECORD Variable in Oracle
How To Assign a Table Row to a RECORD Variable in Oracle? If you have a table, and want to assign a data row of that table to a RECORD variable, you need to define this RECORD variable to match the table column structure, then use the SELECT ... INTO statement to assign a data row that RECORD variab... 2018-08-14, 2753🔥, 0💬

Loop through the Implicit Cursor in Oracle
How To Loop through Data Rows in the Implicit Curosr in Oracle? You use the FOR ... IN ... LOOP statement to loop through data rows in the implicit cursor as the following syntax: FOR row IN dml_statement LOOP (statement block with row.field) END LOOP; Here "row" is a local RECORD type variable with... 2018-07-22, 2727🔥, 0💬

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