What is record type in PL SQL?

What is record type in PL SQL?

A record type is a composite data type that consists of one or more identifiers and their corresponding data types. You can create user-defined record types by using the TYPE IS RECORD statement within a package or by using the CREATE TYPE (Object) statement.

What is cursor record?

A cursor-based record, or cursor record, is a record whose structure is drawn from the SELECT list of a cursor. Each field in the record corresponds to and has the same name as the column or aliased expression in the cursor’s query.

What are the types of cursor in PL SQL?

PL/SQL – Cursors

  • Implicit Cursors. Implicit cursors are automatically created by Oracle whenever an SQL statement is executed, when there is no explicit cursor for the statement.
  • Explicit Cursors.
  • Declaring the Cursor.
  • Opening the Cursor.
  • Fetching the Cursor.
  • Closing the Cursor.

How do you declare a record in PL SQL?

To declare a table-based record, you use the %ROWTYPE attribute with a table name. A table-based record has each field corresponding to a column in a table.

What is cursor based records in PL SQL?

Each field in the select query list of cursor can access cursor base records. Cursor based records are replica of select query list of a cursor. yo can defines column aliases in the select query of a cursor.

Why is cursor used in SQL?

In SQL procedures, a cursor make it possible to define a result set (a set of data rows) and perform complex logic on a row by row basis. By using the same mechanics, an SQL procedure can also define a result set and return it directly to the caller of the SQL procedure or to a client application.

What is the difference between Rowtype and type record?

What is difference between % ROWTYPE and TYPE RECORD? % ROWTYPE is to be used whenever query returns a entire row of a table or view. TYPE rec RECORD is to be used whenever query returns columns of different table or views and variables.

What is mean by Rowtype and type record?

Answered On : Apr 18th, 2008. %rowtype is an attribute to inherit datatypes of attributes of a table into a RECORD variable. Type record is a keyword to create record type using either explicitly specifying atrributes or by implecitly inheriting attributes from a table or a existing cursor.

What is cursor exception Plsql?

An exception is a PL/SQL error that is raised during program execution, either implicitly by TimesTen or explicitly by your program. Handle an exception by trapping it with a handler or propagating it to the calling environment.

When to use the cursor in PL / SQL?

Some important concepts of PL/SQL need to learn and understand clearly by a PL/SQL programmer to use them properly. The cursor is one of them. In the PL/SQL program, SQL statements need to be executed at the end. The cursor is just like a pointer which is used to point the context area, created by the Oracle to execute the SQL statement.

How to create a record type in PL / SQL?

Program variable. To create a Record you define a record type and then declare a variable of this type. You can also create or find COLUMN, VIEW or CURSOR PL/SQL with the values you want to use and the %ROWTYPE attribute to create the corresponding Record.

Which is the row held by a cursor in SQL?

A Cursor holds all the rows returned after the processing of SQL statements. The set of the row which is held by Cursor is referred to as Active Set. The cursor can also be named to use it further in the program by a programmer.

Where do you create an explicit cursor in SQL?

Explicit Cursors. Explicit cursors are programmer-defined cursors for gaining more control over the context area. An explicit cursor should be defined in the declaration section of the PL/SQL Block. It is created on a SELECT Statement which returns more than one row.

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