Oracle PL/SQL-Tipps

DECLARE
   var_a NUMBER := 1;
   var_b VARCHAR2(2001) := 'ABCDEF';
   var_c CHAR(100) := 'ABCDEF';
   var_d DATE := sysdate;
   var_e CLOB;
   var_f BLOB;
   var_g BOOLEAN := TRUE;
   var_h BINARY_FLOAT;
   var_i BINARY_DOUBLE;
   var_j ROWID;
BEGIN
   NULL;
END;