DBE_RANDOM

Interface Description

Table 1 lists all interfaces supported by the DBE_RANDOM package.

• DBE_RANDOM.SET_SEED

  The stored procedure SEED is used to set a seed for a random number. The prototype of the DBE_RANDOM.SET_SEED function is as follows:

  1	DBE_RANDOM.SET_SEED (seed IN INTEGER);

  Table 2 DBE_RANDOM.SET_SEED interface parameters

  Parameter	Description
  seed	Generates a seed for a random number.

• DBE_RANDOM.GET_VALUE

  The GET_VALUE function generates a random number between a specified low and a specified high. The prototype of the DBE_RANDOM.GET_VALUE function is as follows:

  1 2 3 4

  DBE_RANDOM.GET_VALUE( min IN NUMBER default 0, max IN NUMBER default 1) RETURN NUMBER;

  Table 3 DBE_RANDOM.GET_VALUE interface parameters

  Parameter	Description
  min	Sets the low bound for a random number. The generated random number is greater than or equal to min.
  max	Sets the high bound for a random number. The generated random number is less than max.

• The only requirement is that the parameter type is numeric regardless of the right and left bound values.
• DBE_RANDOM implements pseudo-random numbers. Therefore, if the initial value (seed) remains unchanged, the sequence of the pseudo-random numbers also remains unchanged.
• The generated random number contains 15 valid digits.

Examples

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-- Generate a random number between 0 and 1.
SELECT DBE_RANDOM.GET_VALUE(0,1);
    get_value     
------------------
 .917468812743886
(1 row)

-- For integers within a specified range, add the arguments min and max, and truncate the decimals from the result (the maximum value is not included as a possible value). Therefore, for integers from 0 to 99, you can use the following code:
SELECT TRUNC(DBE_RANDOM.GET_VALUE(0,100));
 trunc 
-------
    26
(1 row)