用dba用户查询
select * from dba_objects where object_Name= 'DBMS_RANDOM'
是否存在这个DBMA_RANDOM这个包
然后
insert into table (,,) values (dbms_random.value(1,20),);然后把这条语句放在一个包的循环体里面!~
select * from dba_objects where object_Name= 'DBMS_RANDOM'
是否存在这个DBMA_RANDOM这个包
然后
insert into table (,,) values (dbms_random.value(1,20),);然后把这条语句放在一个包的循环体里面!~
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用sys用户执行以下脚本:
CREATE OR REPLACE PACKAGE SYS.dbms_random AS ------------
-- OVERVIEW
--
-- This package should be installed as SYS. It generates a sequence of
-- random 38-digit Oracle numbers. The expected length of the sequence
-- is about power(10,28), which is hopefully long enough.
--
--------
-- USAGE
--
-- This is a random number generator. Do not use for cryptography.
-- For more options the cryptographic toolkit should be used.
--
-- By default, the package is initialized with the current user
-- name, current time down to the second, and the current session.
--
-- If this package is seeded twice with the same seed, then accessed
-- in the same way, it will produce the same results in both cases.
--
--------
-- EXAMPLES
--
-- To initialize or reset the generator, call the seed procedure as in:
-- execute dbms_random.seed(12345678);
-- or
-- execute dbms_random.seed(TO_CHAR(SYSDATE,'MM-DD-YYYY HH24:MI:SS'));
-- To get the random number, simply call the function, e.g.
-- my_random_number BINARY_INTEGER;
-- my_random_number := dbms_random.random;
-- or
-- my_random_real NUMBER;
-- my_random_real := dbms_random.value;
-- To use in SQL statements:
-- select dbms_random.value from dual;
-- insert into a values (dbms_random.value);
-- variable x NUMBER;
-- execute :x := dbms_random.value;
-- update a set a2=a2+1 where a1 < :x; -- Seed with a binary integer
PROCEDURE seed(val IN BINARY_INTEGER);
PRAGMA restrict_references (seed, WNDS); -- Seed with a string (up to length 2000)
PROCEDURE seed(val IN VARCHAR2);
PRAGMA restrict_references (seed, WNDS); -- Get a random 38-digit precision number, 0.0 <= value < 1.0
FUNCTION value RETURN NUMBER;
PRAGMA restrict_references (value, WNDS); -- get a random Oracle number x, low <= x < high
FUNCTION value (low IN NUMBER, high IN NUMBER) RETURN NUMBER;
PRAGMA restrict_references (value, WNDS); -- get a random number from a normal distribution
FUNCTION normal RETURN NUMBER;
PRAGMA restrict_references (normal, WNDS); -- get a random string
FUNCTION string (opt char, len NUMBER)
/* "opt" specifies that the returned string may contain:
'u','U' : upper case alpha characters only
'l','L' : lower case alpha characters only
'a','A' : alpha characters only (mixed case)
'x','X' : any alpha-numeric characters (upper)
'p','P' : any printable characters
*/
RETURN VARCHAR2; -- string of <len> characters (max 60)
PRAGMA restrict_references (string, WNDS); -- Obsolete, just calls seed(val)
PROCEDURE initialize(val IN BINARY_INTEGER);
PRAGMA restrict_references (initialize, WNDS); -- Obsolete, get integer in ( -power(2,32) <= random < power(2,32) )
FUNCTION random RETURN BINARY_INTEGER;
PRAGMA restrict_references (random, WNDS); -- Obsolete, does nothing
PROCEDURE terminate; TYPE num_array IS TABLE OF NUMBER INDEX BY BINARY_INTEGER;
END dbms_random;