oracle简单基础

SELECT * FROM tra_access_manage AS OF TIMESTAMP(SYSTIMESTAMP - INTERVAL '2' DAY)

 

查询前2天表的数据

 

 

2.

创建一个存储过程，让id自增长

 

CREATE OR REPLACE Procedure pro_getid(
    TableName IN varchar2,      -- 类型：输入表名
    id OUT varchar2
 ) IS
--
-- Purpose: 根据类型返回不同类型的ID,包括提交事务
--          触发器如果调用本过程，小心处理事务。
-- MODIFICATION HISTORY

-- ---------   ------  -------------------------------------------
   -- Declare program variables as shown above
   sTableName   VARCHAR2(30);
   sSequence    VARCHAR2(10);
   sTempSequence        VARCHAR2(20);   -- 临时输出流水号
BEGIN
    sTableName := UPPER(TableName);
    -- 取序列
    CASE WHEN sTableName = 'CUSTOMERBASEINFO' THEN
       -- 年（1位）＋ 月（1位英文字母）＋ 日（1位英文字母） + 序列（6位）
       sTempSequence := fun_conver_date(SYSDATE);
       SELECT seq_cust.NEXTVAL INTO sSequence FROM dual;
       sSequence := Substr('00000'||sSequence, -6, 6);
       id := sTempSequence||sSequence;
    WHEN sTableName = 'DVS' THEN
        pro_get_voicefile('A',id);
    WHEN sTableName = 'ORDERS' THEN
         SELECT seq_order.nextval INTO sSequence FROM dual;
            sSequence := Substr('00000'||sSequence, -6, 6);
           id := to_char(sysdate,'YYYYMMDDHH24MISS')||sSequence;
    WHEN sTableName = 'ORDER' THEN
         SELECT seq_gway.nextval INTO sSequence FROM dual;
         sSequence := Substr('00000'||sSequence, -6, 6);
            id := to_char(sysdate,'YYYYMMDDHH24MISS')||sSequence;
    WHEN  sTableName = 'ORDERSCHEDULE' THEN
         SELECT seq_schedule.nextval INTO sSequence FROM dual;
         sSequence := Substr('00000'||sSequence, -6, 6);
           id := to_char(sysdate,'YYYYMMDDHH24MISS')||sSequence;
   WHEN  sTableName = 'SMSOUTBOX' OR sTableName = 'SHORTMESSAGEOUTBOX' THEN
         SELECT seq_smsoutbox.nextval INTO sSequence FROM dual;
          sSequence := Substr('00000'||sSequence, -6, 6);
           id := to_char(sysdate,'YYYYMMDDHH24MISS')||sSequence;
   WHEN  sTableName = 'SMSENDBOX' THEN
         SELECT seq_smsendbox.nextval INTO sSequence FROM dual;
         sSequence := Substr('00000'||sSequence, -6, 6);
         id := to_char(sysdate,'YYYYMMDDHH24MISS')||sSequence;
    WHEN  sTableName = 'FLOWERORDERSUMA' THEN
         SELECT seq_flower.nextval INTO sSequence FROM dual;
         id := 'T'||to_char(sysdate,'YYMMDD')||'-'||sSequence;
    WHEN  sTableName = 'FLOWERCOMPLAINT' THEN
         SELECT SEQ_FLOWER_COMPL.NEXTVAL INTO sSequence FROM dual;
         id := ''||sSequence;
    WHEN  sTableName = 'RECORD_ID' THEN
         SELECT seq_record.nextval INTO sSequence FROM dual;
         sSequence := Substr('00000'||sSequence, -6, 6);
         id := to_char(sysdate,'YYYYMMDDHH24MISS')||sSequence;
    WHEN sTableName = 'SENDSMS12580SERVICEIMPL' THEN--统一订单二维码发送
         SELECT seq_log.NEXTVAL INTO sSequence FROM dual;
         sSequence := Substr('00000'||sSequence, -6, 6);
         id := to_char(sysdate,'YYMMDD')||sSequence;
    ELSE
         SELECT seq_log.NEXTVAL INTO sSequence FROM dual;
         sSequence := Substr('00000'||sSequence, -6, 6);
         id := to_char(sysdate,'YYYYMMDDHH24MISS')||sSequence;
   END CASE;
 EXCEPTION
    WHEN others THEN
       SELECT seq_log.NEXTVAL INTO sSequence FROM dual;
       sSequence := Substr('00000'||sSequence, -6, 6);
       id := to_char(sysdate,'YYYYMMDDHH24MISS')||sSequence;
END; -- Procedure PRO_GETID