Using %TYPE

The %TYPE attribute gives the datatype of a variable or the database column. In the example below, the %TYPE gives the datatype of a variable:

credit REAL(7,2);
debit credit%TYPE;

The Variables declared using %TYPE is treated such as those declared using a datatype specifier. For example, given the earlier declarations, the PL/SQL treats debit such as REAL (7, 2) variable. The later example shows that a %TYPE declaration can involve an initialization clause:

balance NUMBER(7,2);
minimum_balance balance%TYPE := 10.00;
The %TYPE attribute is mainly useful when declaring a variable which refer to a database columns. You can reference a table & column, or you can reference an owner, column, table, and as in

my_dname scott.dept.dname%TYPE;

Using the %TYPE to declare my_dname has two merits. Firstly, you do not require knowing the exact datatype of dname. Secondly, when the database definition of the dname changes, the datatype of my_dname change accordingly at the run time.

Posted Date: 10/3/2012 4:44:08 AM | Location : United States

Ask an Expert

Related Discussions:- Using %type-declarations in sql, Assignment Help, Ask Question on Using %type-declarations in sql, Get Answer, Expert's Help, Using %type-declarations in sql Discussions

Write discussion on Using %type-declarations in sql
Your posts are moderated

Write your message here..

Related Questions

Data types in sql - decimal, Data Types in SQL - Decimal DECIMAL, NUME... Data Types in SQL - Decimal DECIMAL, NUMERIC, REAL, FLOAT and various other terms for various sets of rational numbers. When these key words are specified for the declared typ

Seeking a programmer to design a legal document, Seeking a programmer to de... Seeking a programmer to design a legal document with pre-existing fields that could allow the auto-population of client(s) information (i.e. Name, Account Number, Address etc.) int

Example of using aggregation on nested tables, Example of Using Aggregation... Example of Using Aggregation on Nested Tables Example: How many students sat each exam WITH C_ER AS (SELECT CourseId, CAST (TABLE (SELECT DISTINCT StudentId, Mark FROM EXAM

Data types in sql - integer, Data Types in SQL - Integer INTEGER or  s... Data Types in SQL - Integer INTEGER or  synonymously INT, for integers within a certain range. SQL additionally has types SMALLINT and BIGINT for certain ranges of integers. T

Table comparison - sql, Table Comparison - SQL The following definitio... Table Comparison - SQL The following definitions for relation comparisons: Let r1 and r2 be relations having the same heading. Then: r1 ⊆ r2 is true if every tuple of r1

Package - pl/sql programming, What Is a Package? The package is a sch... What Is a Package? The package is a schema object that group logically related PL/SQL items, types, and subprograms. The Packages usually have 2 parts, a specification & a bo

Order of evaluation-pl/sql expressions , Order of Evaluation When you do... Order of Evaluation When you do not use the parentheses to specify the order of evaluation, the operator precedence determine the order. Now compare the expressions below: NOT

Multiple assignment - sql, Multiple Assignment- SQL SQL supports mult... Multiple Assignment- SQL SQL supports multiple assignment to local variables and also applies multiple assignment semantics in SET clauses of UPDATE statements, but does not

Package specification, The Package Specification The package specificat... The Package Specification The package specifications contain the public declarations. The scopes of these declarations are local to your database representation and global to t

Authorize and fetch data from instagram, Authorize and fetch data from Inst... Authorize and fetch data from Instagram Project Description: Incorporate Instagram feed on mobile site platform: c#, ms sql, jquerymobile, jquery Web admin Author