The Hibernate primary key generator is used to generate the primary key for data table records. There are several common primary key generation methods.Key GeneratorPrimary key generator:First, we will introduce several common primary key generators:
Generate a key generator from a hibernate primary key
The Hibernate primary key generator is used to generate the primary key for data table records. There are several common primary key generation methods.
Key Generator
Primary key generator:
First,
First of all, you have to have a table!CREATE TABLE Example (ID Number (4) Not NULL PRIMARY KEY,NAME VARCHAR (25),PHONE VARCHAR (10),ADDRESS VARCHAR (50));If you have any questions about the above statement, it is recommended that you do not
How to Set auto-increment primary keys in oracle
First, you must have a table!
Create table example (ID Number (4) not null primary key,Name varchar (25 ),Phone varchar (10 ),Address varchar (50 ));If you have any questions about the preceding table
1. KeywordsAuto_increment
2. Auto-IncrementUsageExample:
Create Table animals (ID mediumint not null auto_increment,
Name char (30) not null,
Primary Key (ID ));
3.About Auto-Increment
Q: How to obtain the current maximum auto-increment value? A:
From: http://www.linuxidc.com/Linux/2008-08/15068.htm
1. KeywordsAuto_increment
2. Auto-increment usageExample:Create Table animals (ID mediumint not null auto_increment,Name char (30) not null,Primary Key (ID ));
3. Auto-Increment
Q: How to
1. assigned:
Primary Key from externalProgramGenerates data without hibernate. ---- If the programCodeTo specify the primary key.
2. increment:
Generates auto-increment primary keys for long, short, or Int data columns. The increment primary
Comparison between MYSQL and MSSQL and MYSQLMSSQL
Recently, I was modifying the MSSQL statements related to a company's product to statements that can be executed on MYSQL.
L Advantage Analysis:
MYSQL is short, easy to use, easy to use, and free
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Source Description: This post, the original web site http://www.cnblogs.com/leup/archive/2007/11/18/962952.html
Reason for posting: The Oracle Auto-increment field is different from the SQL field, but the call is very interesting. Multiple users
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