AUTO_INCREMENT Integers : AUTO_INCREMENT « Data Type « SQL / MySQL






  1. SQL / MySQL
  2. Data Type
  3. AUTO_INCREMENT

AUTO_INCREMENT Integers

       
mysql>
mysql> CREATE TABLE a (
    ->  id INT NOT NULL AUTO_INCREMENT,
    ->  choice TINYINT NOT NULL,
    ->  ts TIMESTAMP,
    ->  PRIMARY KEY (id));
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql> drop table a;
Query OK, 0 rows affected (0.00 sec)








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3.An AUTO_INCREMENT column
4.AUTO_INCREMENT sequences start at one
5.For MyISAM tables, you can begin the sequence at a specific initial value n by including an AUTO_INCREMENT = n
6.Using an AUTO_INCREMENT Column to Create Multiple Sequences
7.AUTO_INCREMENT column:
8.Not null tinyint and AUTO_INCREMENT
9.MEDIUMINT NOT NULL AUTO_INCREMENT
10.INTEGER UNSIGNED AUTO_INCREMENT
11.Insert value to AUTO_INCREMENT column
12.delete and reinsert value to AUTO_INCREMENT column
13.SET @@AUTO_INCREMENT_OFFSET = 10,@@AUTO_INCREMENT_INCREMENT = 10
14.Set AUTO_INCREMENT value
15.Parameter: INT NOT NULL AUTO_INCREMENT
16.Create a similar table, preserve the auto-incrementing key
17.Defining Auto-Increment Columns
18.If this value is larger than the current sequence counter, subsequent automatically generated values begin with the value plus one