Memory allocation differences between the CHAR and VARCHAR2 datatypes : CHAR « Data Type « Oracle PL / SQL






  1. Oracle PL / SQL
  2. Data Type
  3. CHAR

Memory allocation differences between the CHAR and VARCHAR2 datatypes

    
SQL>
SQL> DECLARE
  2    c CHAR(32767)     := ' ';
  3    v VARCHAR2(32767) := ' ';
  4  BEGIN
  5    dbms_output.put_line('c is ['||LENGTH(c)||']');
  6    dbms_output.put_line('v is ['||LENGTH(v)||']');
  7    v := v || ' ';
  8    dbms_output.put_line('v is ['||LENGTH(v)||']');  END;
  9  /
c is [32767]
v is [1]
v is [2]

PL/SQL procedure successfully completed.

SQL>








Related examples in the same category

1.The CHAR data type is used for storing fixed-length character strings.
2.char type with 50 characters
3.Define varchar2 type variable
4.Comparison of CHAR with VARCHAR2
5.Define and use char value
6.set column width by setting char number
7.CHAR() and VARCHAR2()
8.'' represents a zero length character string BUT NOT a null value
9.No equality comparison between two '' strings
10.Compare char value without knowing the case
11.Convert string to clob
12.char type and varchar2 type