How to Assign Random Numbers to Database Records in MySQL?

Assigning Random Numbers to Database Records

In database management, the need often arises to populate fields with random values. For instance, a developer may want to assign a random number within a specific range to each record in a column.

To achieve this in MySQL, one can employ the following query:

<code class="sql">UPDATE tableName SET columnName = FLOOR(1 + RAND() * 3);</code>

Here, the RAND() function generates a random floating-point value between 0 and 1. By multiplying it by 3, the range is extended to 0-3. Adding 1 ensures the result is a positive integer.

Finally, the FLOOR() function effectively rounds the result down to the nearest integer, ensuring that the random number falls within the desired range of 1-3.

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