oracle取兩個(gè)時(shí)間隨機(jī)？1. 隨機(jī)數(shù)包SELECT DBMS_RANDOM.VALUEFROM DUAL2. 在[0..100]范圍內(nèi)取隨機(jī)數(shù)SELECT TRUNC (DBMS_RANDO

oracle取兩個(gè)時(shí)間隨機(jī)？

1. 隨機(jī)數(shù)包

SELECT DBMS_RANDOM.VALUE

FROM DUAL

2. 在[0..100]范圍內(nèi)取隨機(jī)數(shù)

SELECT TRUNC (DBMS_RANDOM.VALUE ( 0 ， 100 ))

FROM DUAL

3. 大于字符‘A’的10個(gè)字符隨機(jī)字符串

SELECT DBMS_RANDOM.STRING ( " A " ， 10 )

FROM DUAL

4. 單個(gè)小寫(xiě)隨機(jī)字符

SELECT CHR ( ROUND (DBMS_RANDOM.VALUE ( 97 ， 122 )))

FROM DUAL

5. 在過(guò)去30分鐘內(nèi)取隨機(jī)時(shí)間

SELECT (SYSDATE - 1 / 24 / 60 * 30 ) DBMS_RANDOM.VALUE ( 1 ， 1800 ) / 3600 / 24

FROM DUAL

oracle如何隨機(jī)取一張表的幾條記錄？

select tt.* from (select rownum rn，t.* from table1 t ) tt where tt.rn in (select trunc(dbms_random.value(1，(select count(*) from table1 ))) from dual connect by rownum <=10) ----這里是最多取10條