1 --生成随机表
 2 --CREATE table scott.One_Million as (
 3 SELECT ROWNUM AS T_ID,
 4        TRUNC(DBMS_RANDOM.VALUE(0, 100)) 年龄,
 5        DECODE(DBMS_RANDOM.STRING(0, 1),
 6               ‘A‘,
 7               ‘张‘,
 8               ‘B‘,
 9               ‘周‘,
10               ‘C‘,
11               ‘李‘,
12               ‘D‘,
13               ‘赵‘,
14               ‘E‘,
15               ‘安‘,
16               ‘F‘,
17               ‘王小‘,
18               ‘小‘) || 
19          DECODE(DBMS_RANDOM.STRING(0, 1),
20                ‘A‘,
21                ‘娜‘,
22                ‘B‘,
23                ‘娟‘,
24                ‘C‘,
25                ‘梅‘,
26                ‘D‘,
27                ‘美‘,
28                ‘E‘,‘鹏‘,
29                (DBMS_RANDOM.STRING(1,1))) AS 姓名,
30          to_char(sysdate-TRUNC(DBMS_RANDOM.VALUE(1,1000000000))/24/60/60,‘yyyy-mm-dd hh24:mi:ss‘) 生日,
31          trunc(DBMS_RANDOM.VALUE(100000000,900000000)) 编号,
32          DBMS_RANDOM.STRING(1,25) 字符串
33   FROM DUAL
34 CONNECT BY LEVEL <= 1000000
35 
36 --)