How to populate a MySQL table with random numbers using a stored procedure?

Populating a MySQL Table with Random Numbers Using a Stored Procedure

Populating a MySQL table with many random numbers requires a systematic approach. This article demonstrates how to create such a table (rand_numbers) with one column (number) of type INT and 1111 rows, where each row contains a random number between 2222 and 5555.

To accomplish this task, we utilize a stored procedure (InsertRand) that iterates through the desired number of rows and inserts random numbers within the specified range (MinVal and MaxVal) into the rand_numbers table. This procedure simplifies the insertion process and enables reuse for various data sets.

Creating the Table

First, the rand_numbers table is created using the CREATE TABLE statement:

CREATE TABLE rand_numbers (number INT NOT NULL) ENGINE = MYISAM;

Populating the Table

Next, the InsertRand stored procedure is defined:

DELIMITER $$
CREATE PROCEDURE InsertRand(IN NumRows INT, IN MinVal INT, IN MaxVal INT)
    BEGIN
        DECLARE i INT;
        SET i = 1;
        START TRANSACTION;
        WHILE i <p>This procedure takes three parameters: NumRows (the number of rows to insert), MinVal (the minimum value of the random number), and MaxVal (the maximum value of the random number).</p><p>To populate the table with 1111 random numbers between 2222 and 5555, the following statement is executed:</p><pre class="brush:php;toolbar:false">CALL InsertRand(1111, 2222, 5555);

Reusing the Procedure

The InsertRand procedure can be reused to insert additional random numbers with different parameters. For instance, to insert 600 rows with random values between 1200 and 8500:

CALL InsertRand(600, 1200, 8500);

This versatile stored procedure provides a convenient and efficient method for populating MySQL tables with large volumes of random numbers.

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