oracle数据类型表

set SERVEROUTPUT ON
declare
v_char char(10);
v_varchar2 varchar2(10);
begin
v_char:='java';
v_varchar2:='java';
DBMS_OUTPUT.PUT_LINE('CHAR LENGTH IS '||LENGTH(v_char));
DBMS_OUTPUT.PUT_LINE('VARCHAR LENGTH IS '||LENGTH(v_varchar2));
END;

PL/SQL 过程已成功完成。
PL/SQL 过程已成功完成。
CHAR LENGTH IS 10
VARCHAR LENGTH IS 4