Oracle学习笔记

• 序列

CREATE SEQUENCE MYSEQ
START WITH 1--从1开始
INCREMENT BY 1--每次增长一个
--NOMAXVALUE 没有最大值
MAXVALUE 99999999999999--最大值
MINVALUE 1--最小值
NOCYCLE--一直累加不循环 CYCLE表示循环
NOCACHE--没有缓存

• 存储过程

create or replace procedure proc1(p_para1 in  varchar2,
                                  p_para2 in  varchar2,
                                  p_para3  out varchar2) as
  v_name varchar2(20);
begin

  v_name  := '五娃';
  p_para3 := v_name;
  p_para3 := 'p_para1  :' || p_para1 || '  p_para2:  ' || p_para2 || '  p_para3:  ' ||
  
             p_para3 || '  v_name:  ' || v_name;
end;

CREATE OR REPLACE PROCEDURE PROC2(

V_ID in VARCHAR2,
V_NAME IN VARCHAR2

)
AS
BEGIN
UPDATE USERINFO SET NAME=V_NAME WHERE ID=V_ID;
END;

CREATE OR REPLACE PROCEDURE PROC3(
                                  
                                  V_ID   IN VARCHAR2,
                                  V_NAME IN VARCHAR2,
                                  V_AGE  IN VARCHAR2,
                                  V_PWD  IN VARCHAR2
                                  
                                  ) AS
BEGIN

  INSERT INTO USERINFO
    (ID, NAME, AGE, PWD)
  VALUES
    (V_ID, V_NAME, V_AGE, V_PWD);

END;

--配合游标和包使用
CREATE OR REPLACE PROCEDURE PROC4(
P_CURSOR OUT GETLIST.TEST_CURSOR

) AS
BEGIN
  OPEN P_CURSOR FOR
    SELECT * FROM USERINFO WHERE AGE <= 10;

END;

CREATE OR REPLACE PROCEDURE PROC5
AS
BEGIN

INSERT INTO USERINFO(ID,NAME,AGE,PWD) VALUES ((SELECT DBMS_RANDOM.RANDOM FROM DUAL ),sysdate,'1','123');

END;

CREATE OR REPLACE PROCEDURE TESTPROC(

V_ID in VARCHAR2,
V_NAME OUT VARCHAR2

)
AS
BEGIN
  select name into V_NAME from userinfo where id =V_ID;
END;

• 包

CREATE OR REPLACE PACKAGE GETLIST
AS

TYPE TEST_CURSOR IS REF CURSOR;
END;

• 定时器

• 索引