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Revision: 31118
at August 30, 2010 10:29 by mprabhuram

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-- Oracle has provided a method to declare a variable using the database object the data is based on.  To execute this use the %type declaration.

v_auth_name author.author_last_name%type;

-- You can also create records using the %rowtype  declaration.

r_auth  author%rowtype;

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In the examples so far we have declared variables as a separate object using one of PL/SQL’s standard datatypes. Normally a PL/SQL variable is closely tied to a database object and uses the same datatype.  For example, if the variable will hold the book title from the book table , the variable definition must be of the exact same type and size as the table column.  But what happens when the DBA changes the book table so that book_title is defined as a varchar2(60) instead of a varchar2(40)?  It’s important to program in such a way that when the tables are changed, the PL/SQL code does not always need to be changed

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Variable Declaration Using Database Objects %rowtype

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