生成大量随机数 存入数据库,该如何处理
生成大量随机数 存入数据库
比如我想1000个10位随机数 然后插入数据库 有没有什么比较高效的方法呢？
------解决方案--------------------
来个PROCEDURE
- SQL code
DROP PROCEDURE IF EXISTS `insert`;
CREATE PROCEDURE `insert`(num int)
BEGIN
DECLARE i INT;
DECLARE var INT;
SET i=1;
WHILE i<num do set var="FLOOR(RAND()*10000000000);" insert into table values i="i+1;" end while call class="clear">
</num>
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
What are the usages of oracle declare
Sep 15, 2023 pm 01:12 PM
Oracle declare usage includes variable declaration, constant declaration, cursor declaration and subroutine declaration. Detailed introduction: 1. Variable declaration, in PL/SQL block, you can use the DECLARE statement to declare variables; 2. Constants are unchangeable values declared in PL/SQL block; 3. Cursor declaration, used in PL/SQL The query result set is processed in the block; 4. Subroutine declaration. A subroutine is a reusable code block defined in a PL/SQL block.
Detailed explanation of the method of converting int type to bytes in PHP
Mar 06, 2024 pm 06:18 PM
Detailed explanation of the method of converting int type to byte in PHP In PHP, we often need to convert the integer type (int) to the byte (Byte) type, such as when dealing with network data transmission, file processing, or encryption algorithms. This article will introduce in detail how to convert the int type to the byte type and provide specific code examples. 1. The relationship between int type and byte In the computer field, the basic data type int represents an integer, while byte (Byte) is a computer storage unit, usually 8-bit binary data
C++ program to convert double type variable to int type
Aug 25, 2023 pm 08:25 PM
In C++, variables of type int can only hold positive or negative integer values; they cannot hold decimal values. There are float and double values available for this purpose. The double data type was created to store decimals up to seven digits after the decimal point. Conversion of an integer to a double data type can be done automatically by the compiler (called an "implicit" conversion), or it can be explicitly requested by the programmer from the compiler (called an "explicit" conversion). In the following sections, we'll cover various conversion methods. Implicit conversions The compiler performs implicit type conversions automatically. To achieve this, two variables are required - one of floating point type and the other of integer type. When we simply assign a floating point value or variable to an integer variable, the compiler takes care of all the other things
What is the difference between insert ignore, insert and replace in mysql
May 29, 2023 pm 04:40 PM
The difference between insertignore, insert and replace instructions already exist or not. Example of insert error. Insertintonames(name,age)values("Xiao Ming", 23); insertignore ignores insertignoreintonames(name, age)values("Xiao Ming", 24); replace Replace and insert replaceintonames(name,age)values("Xiao Ming", 25); table requirements: PrimaryKey, or unique index result: the table id will be automatically incremented. Test code creates table
What is the value range of int32?
Aug 11, 2023 pm 02:53 PM
The value range of int32 is from -2 to the 31st power to 2 to the 31st power minus 1, that is, -2147483648 to 2147483647. int32 is a signed integer type, which means it can represent positive numbers, negative numbers, and zero. It uses 1 bit to represent the sign bit, and the remaining 31 bits are used to represent the numerical value. Since one bit is used to represent the sign bit, the effective number of int32 bits is 31.
How many numbers does java int have?
Mar 06, 2023 pm 04:09 PM
In Java, int is a 32-bit signed data type, and its variables require 32-bit memory; the valid range of the int data type is -2147483648 to 2147483647, and all integers in this range are called integer literals. An integer literal can be assigned to an int variable, such as "int num1 = 21;".
How many bytes does int occupy?
Jan 22, 2024 pm 03:14 PM
The number of bytes occupied by the int type may vary in different programming languages and different hardware platforms. Detailed introduction: 1. In C language, the int type usually occupies 2 bytes or 4 bytes. In 32-bit systems, the int type occupies 4 bytes, while in 16-bit systems, the int type occupies 2 bytes. In a 64-bit system, the int type may occupy 8 bytes; 2. In Java, the int type usually occupies 4 bytes, while in Python, the int type has no byte limit and can be automatically adjusted, etc.
Use java's StringBuilder.insert() function to insert a string at the specified position
Jul 24, 2023 pm 09:37 PM
Use java's StringBuilder.insert() function to insert a string at a specified position. StringBuilder is a class in Java used to handle variable strings. It provides a variety of methods to operate strings. The insert() function is used to insert strings at specified positions. One of the common methods of positionally inserting strings. In this article, we will introduce how to use the insert() function to insert a string at a specified position and give corresponding code examples. insert()
