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I want to generate random 6 digit number in mysql but sometime it generate only 5 digit.
UPDATE member SET updates = FLOOR(RAND() * 999999)
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One simple method is to make use of RAND() function available in SQL Server. RAND() function simply generate a decimal number between 0 (inclusive) and 1 (exclusive). The logic is to multiply value returned by RAND() by 1 billion so that it has enough digits and apply LEFT function to extract 6 digits needed.
MySQL RAND() Function The RAND() function returns a random number between 0 (inclusive) and 1 (exclusive).
To get the random value between two values, use MySQL rand() method with floor(). The syntax is as follows. select FLOOR( RAND() * (maximumValue-minimumValue) + minimumValue) as anyVariableName; Let us check with some maximum and minimum value.
One way to generate these numbers in C++ is to use the function rand(). Rand is defined as: #include <cstdlib> int rand(); The rand function takes no arguments and returns an integer that is a pseudo-random number between 0 and RAND_MAX.
If the problem is that you are missing leading zeros, you can left pad with spaces:
UPDATE member
SET updates = LPAD(FLOOR(RAND() * 999999.99), 6, '0');
I hope you understand that "random" means "random" and different rows can get the same value.
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