PLSQL: %TYPE x %ROWTYPE

Community ForumCategory: PLSQLPLSQL: %TYPE x %ROWTYPE
matheusdba Staff asked 3 months ago

What is the difference between %TYPE and %ROWTYPE?

1 Answers
matheusdba Staff answered 3 months ago

Both %TYPE and %ROWTYPE are used to define variables in PL/SQL as it is defined within the database. If the datatype or precision of a column changes, the program automatically picks up the new definition from the database without having to make any code changes.

The %TYPE and %ROWTYPE constructs provide data independence, reduces maintenance costs, and allows programs to adapt as the database changes to meet new business needs.

%TYPE
%TYPE is used to declare a field with the same type as that of a specified table’s column. Example:

DECLARE
v_EmpName emp.ename%TYPE;
BEGIN
SELECT ename INTO v_EmpName FROM emp WHERE ROWNUM = 1;
DBMS_OUTPUT.PUT_LINE('Name = ' || v_EmpName);
END;
/

%ROWTYPE
%ROWTYPE is used to declare a record with the same types as found in the specified database table, view or cursor. Examples:

DECLARE
v_emp emp%ROWTYPE;
BEGIN
v_emp.empno := 10;
v_emp.ename := 'XXXXXXX';
END;
/