Oracle中如何用一條SQL快速生成10萬條測試資料
阿新 • • 發佈:2018-12-31
SQL> select rownum as id,
2 to_char(sysdate + rownum / 24 / 3600, 'yyyy-mm-dd hh24:mi:ss') as inc_datetime,
3 trunc(dbms_random.value(0, 100)) as random_id,
4 dbms_random.string('x', 20) as random_string
5 from dual
6 connect by level <= 10;
ID INC_DATETIME RANDOM_ID RANDOM_STRING
---------- ------------------- ---------- --------------------------------------------------------------------------------
1 2009-12-08 19:43:14 76 GWMU280MIVBKKOCZV620
2 2009-12-08 19:43:15 34 GNV88O6TDHD3TWC5GWI5
3 2009-12-08 19:43:16 77 LI6H4O5IAHQIMO4B0WMH
4 2009-12-08 19:43:17 99 LP7XP49I0YOJIYSJDQZO
5 2009-12-08 19:43:18 55 V3284X9RXW4UZI8BQMO3
6 2009-12-08 19:43:19 16 T0OA52UAOGHL1TT46H25
7 2009-12-08 19:43:20 61 UY6RUOF7HWTO86942FLP
8 2009-12-08 19:43:21 25 JYXO4OPEW8J1CKVCPDJR
9 2009-12-08 19:43:22 10 DONU6W9QVQM3KJ2UG8LO
10 2009-12-08 19:43:23 76 J8DJLVNOUIZDXE4UXUJG
10 rows selected
2 to_char(sysdate + rownum / 24 / 3600, 'yyyy-mm-dd hh24:mi:ss') as inc_datetime,
3 trunc(dbms_random.value(0, 100)) as random_id,
4 dbms_random.string('x', 20) as random_string
5 from dual
6 connect by level <= 10;
ID INC_DATETIME RANDOM_ID RANDOM_STRING
---------- ------------------- ---------- --------------------------------------------------------------------------------
1 2009-12-08 19:43:14 76 GWMU280MIVBKKOCZV620
2 2009-12-08 19:43:15 34 GNV88O6TDHD3TWC5GWI5
3 2009-12-08 19:43:16 77 LI6H4O5IAHQIMO4B0WMH
4 2009-12-08 19:43:17 99 LP7XP49I0YOJIYSJDQZO
5 2009-12-08 19:43:18 55 V3284X9RXW4UZI8BQMO3
6 2009-12-08 19:43:19 16 T0OA52UAOGHL1TT46H25
7 2009-12-08 19:43:20 61 UY6RUOF7HWTO86942FLP
8 2009-12-08 19:43:21 25 JYXO4OPEW8J1CKVCPDJR
9 2009-12-08 19:43:22 10 DONU6W9QVQM3KJ2UG8LO
10 2009-12-08 19:43:23 76 J8DJLVNOUIZDXE4UXUJG
10 rows selected