mysql rand function

The RAND () Optimization Method for MySQL optimization and the rand Method for mysql Optimization As we all know, in MySQL, if order by rand () is used directly, the efficiency is very poor because it will be executed multiple times. In fact, this

This article describes how to use the RAND () function in MySQL. It is the basic knowledge in MySQL getting started. For more information, see MySQLRAND () function calls can generate a random number between 0 and 1 :? 1234567 mysqlSELECTRAND (),

How to write a statement can update hundreds of MySQL data! Need to test MySQL database, there is a database of tens of thousands of data, how to write a PHP file each time update hundreds of information, I am writing a cycle update a message, so I

This article mainly introduces the rand () function in MySQL in the use of detailed, is the basic knowledge of MySQL primer, need friends can refer to the The MySQL RAND () function call can produce a random number between 0 and 1: ? 1

This article mainly introduces the RAND () optimization method for MySQL optimization. This article analyzes several optimization methods for RAND () in Mysql in detail, and finally draws a conclusion, if you want to directly order by rand () in

MySQL RAND () function Usage Details, mysqlrand MySQL RAND () function calls can generate a random number between 0 and 1: mysql> SELECT RAND( ), RAND( ), RAND( );+------------------+-----------------+------------------+| RAND( ) | RAND( ) |

The RAND function returns a random floating point value ranging from 0 to 10. If an integer parameter N is specified, it is used as a seed value. I. friend's problem is described as follows: a stored procedure is used to insert 100 data into the

[MySQL optimization case] series-RAND () optimization we all know that in MySQL, if order by rand () is used directly, the efficiency is very poor because it will be executed multiple times. In fact, this is also true if the equivalent query uses

The MySQL RAND () function call can produce a random number between 0 and 1: Mysql> SELECT rand (), RAND (), Rand (); +------------------+-----------------+------------------+ | RAND () | RAND () | RAND () | +------------------+--------

Tips for using the random number function rand () in the specified range of MySQL, mysqlrand The formula is as follows: Rand () * (y-x) + x All php users know that the random function rand or mt_rand can input a parameter to generate a random