Question

我有这个Oracle表，我想填充随机数据：

CREATE TABLE AGENT_HISTORY(
  EVENTID INTEGER NOT NULL,
  AGENTID INTEGER NOT NULL,
  EVENT_DATE DATE,
  CPU INTEGER,
  RAM NUMBER,
  HDD NUMBER,
  NETWORK_UP NUMBER,
  NETWORK_DOWN NUMBER
)
/

-- CREATE INDEXES FOR TABLE AGENT_HISTORY

CREATE INDEX IX_RELATIONSHIP1 ON AGENT_HISTORY (AGENTID)
/

-- ADD KEYS FOR TABLE AGENT_HISTORY

ALTER TABLE AGENT_HISTORY ADD CONSTRAINT KEY8 PRIMARY KEY (EVENTID)
/

如何在60天后生成随机数据（第EVENT_DATE列）？我想每天插入一些随机网络流量数据吗？

Answer 1

使用下面的pl / sql块生成随机数据，它也将插入到您的表中。

    declare 
      v_EVENTID INTEGER;
      v_AGENTID INTEGER:=1;
      v_EVENT_DATE  DATE:=sysdate-60; 
      v_CPU INTEGER;
      v_RAM NUMBER;
      v_HDD NUMBER;
      v_NETWORK_UP NUMBER;
      v_NETWORK_DOWN NUMBER;
    begin 
    for i in 1..100
    loop
    v_EVENT_DATE:=v_EVENT_DATE-1;
    select i,ceil(dbms_random.value(1,1000)),floor(dbms_random.value(1,1000)),ceil(dbms_random.value(1,100))*2,floor(dbms_random.value(1,100))*2,100+i
     into v_EVENTID,v_CPU,v_ram,v_HDD,v_NETWORK_UP,v_NETWORK_DOWN    from dual;
    --insert into AGENT_HISTORY values(v_EVENTID,v_AGENTID,v_EVENT_DATE,v_CPU,v_ram,v_HDD,v_NETWORK_UP,v_NETWORK_DOWN);
dbms_output.put_line(v_EVENTID||' '||v_AGENTID||' '||v_EVENT_DATE||' '||v_CPU||' '||v_ram||' '||v_HDD||' '||v_NETWORK_UP||' '||v_NETWORK_DOWN) ;
    end loop;
    end;

Answer 2

INSERT INTO AGENT_HISTORY (EVENTID, AGENTID, EVENT_DATE, CPU, RAM, HDD, NETWORK_UP, NETWORK_DOWN)
SELECT LEVEL, LEVEL, TRUNC(SYSDATE - LEVEL + 1), DBMS_RANDOM.VALUE * 100, DBMS_RANDOM.VALUE, DBMS_RANDOM.VALUE, DBMS_RANDOM.VALUE, DBMS_RANDOM.VALUE
FROM DUAL CONNECT BY LEVEL <= 60;

Answer 3

如果您希望对代码有程序生成感觉，而不实际上下文切换到PL / SQL，则可以使用MODEL子句生成数据...

INSERT INTO agent_history (EVENTID, AGENTID, EVENT_DATE, CPU, RAM, HDD, NETWORK_UP, NETWORK_DOWN)
SELECT EVENTID, AGENTID, EVENT_DATE, CPU, RAM, HDD, NETWORK_UP, NETWORK_DOWN
FROM agent_history
MODEL DIMENSION BY (0 ITERATION)
      MEASURES (EVENTID, AGENTID, EVENT_DATE, CPU, RAM, HDD, NETWORK_UP, NETWORK_DOWN)
      RULES ITERATE (60) ( --Or however many days you want to iterate over
        EVENTID[ITERATION_NUMBER]      = 100-ITERATION_NUMBER,              
        AGENTID[ITERATION_NUMBER]      = 1,                                 
        EVENT_DATE[ITERATION_NUMBER]   = TRUNC(SYSDATE-ITERATION_NUMBER+1), 
        CPU[ITERATION_NUMBER]          = ceil(dbms_random.value(1,100)),
        RAM[ITERATION_NUMBER]          = floor(dbms_random.value(1,100)),
        HDD[ITERATION_NUMBER]          = ceil(DBMS_RANDOM.VALUE * 100),
        NETWORK_UP[ITERATION_NUMBER]   = DBMS_RANDOM.VALUE * 100+1,
        NETWORK_DOWN[ITERATION_NUMBER] = DBMS_RANDOM.VALUE * ITERATION_NUMBER
      )
ORDER BY EVENT_DATE;

用于生成随机数据的SQL语句

3 个答案: