auto increment

MyISAM data table After a record with the maximum number is deleted, the number cannot be reused. You can use the "auto_increment = N" option to specify an auto-increment initial value when creating a table. You can use the alter table table_name

Prefix and suffix of the auto-increment and auto-increment operators, and suffix of the operator prefix. There is such a question in the exam: 12 inta = 4;(++a) += i; Evaluate the value of a. The correct answer is 10. If you think

Sequencee can perform auto-increment and auto-increment operations on one or more fields of a single instance, or perform batch auto-increment and auto-increment operations on data that meet the conditions. The auto-increment and auto-increment of a

& Lt; spanstyle = & quot; color: rgb (54,46, 43); font-family: Simsun; font-size: 16px; line-height: 24px; text-indent: 2em; & quot; & gt; when we were studying the first language, for example, the C language programming in a university course,

In C #, the syntax for reloading the auto-increment and auto-Subtract operators is nothing special, as shown below: Public static sometype operator ++ (sometype some){// Specific implementation} For auto-increment and auto-subtraction operators in C

How does SQL Server modify the auto-increment column value and corresponding solutions? A special task encountered in today's work is to change the values of the two auto-incrementing columns.Since the SQL Server platform has previously migrated the

Mnesia is a distributed database management system that comes with erlangotp. The implementation of mnesia with erlang is almost ideal, but it is unsatisfactory in actual use and there will always be some shortcomings. The mnesia data table does not

I saw an interview question today, which involves a very elementary question, as shown below:   Write the output result of the php segment: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> $ Count = 5

The mysteries of the auto-increment and auto-increment operations in PHP. First, let's take a look at the questions about the auto increment and auto increment operations in PHP: $ a1; $ B $ a; if ($ B $ a ++) echotrue; elseechofalse; first, creates

The mysteries of auto-increment and auto-increment operations in PHP First, let's take a look at the interview question: $ A = 1; $ B = & $ a; if ($ B = $ a ++) echo "true"; else echo "false "; First, create a variable $ a and set the value to 1

When you insert A piece of data in Table A and insert data in Table B, you need to add the auto-increment corresponding to the corresponding field in table A. How do you get the auto-increment of Table? Next, we will introduce the auto-increment in

MySQL tutorial-When AUTO_INCREMENT auto-increment encounters 0 DBAs familiar with SQL Server know that if you want to display the auto-increment values in SQL Server, except for the auto-increment columns in the INSERT statement, you also need to

Write the output result of the php segment: The answer is: 501. It involves two knowledge points: 1. php variable scope; 2. Auto-increment/auto-increment variables;   The interviewer understands the scope of "php variables" well, but he is not sure

PHP auto-incrementing write the output result of the php segment: The answer is: 501. It involves two knowledge points: 1. php variable scope; 2. Auto-increment/auto-increment variables; The interviewer understands the scope of "php

The problem is simple: the attribute aid in tableA is the auto-increment primary key, the attribute bid in tableB is the auto-increment primary key, and the aid in A is referenced as the foreign key. If the aid in B is set to auto-increment, there

From: http://blog.chinaunix.net/space.php? Uid = 13626447 & Do = Blog & cuid = 392987   Usage: Create Table Test(Id int unsigned not null primary key auto_increment,Username varchar (15) not null)Auto_increment = 100; In database

MySQL faq:how do I define a MySQL auto increment field?Here's an example of the normally create a MySQL auto Increment (auto_increment) field:CREATE TABLE pizzas ( ID int auto_increment NOT NULL, name varchar (+) NOT NULL, primary key (ID));　　As

I have been searching for it online for a long time. Some people say that uuid is better, that is, it is easier to merge data into sub-databases and sub-tables, and some people say that auto-increment is better, when there is more data in the table,

auto-increment will generate a unique number when the new record is inserted into the table. AUTO INCREMENT FieldWe typically want to automatically create a value for the primary key field each time a new record is inserted.We can create a

Clause 5: Be careful with user-defined conversion functions   C ++ allows the compiler to implicitly convert two data types. (Implicit conversion). First, C ++ inherits the type conversion policy of C language. In addition, C ++ has two types of