Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies在 MySQL 中建立表時如何設定 AUTO_INCREMENT？
我們首先建立一個表。我們在建立表時使用了 AUTO_INCREMENT 為學生 ID 設定自增值 −
mysql> create table DemoTable -> ( -> StudentId int NOT NULL AUTO_INCREMENT, -> StudentFirstName varchar(100), -> StudentLastName varchar(100), -> StudentAge int, -> StudentCountryName varchar(100), -> PRIMARY KEY(StudentId) -> )AUTO_INCREMENT=30; Query OK, 0 rows affected (0.69 sec)
使用 insert 命令向表中插入一些記錄 −
mysql> insert into DemoTable(StudentFirstName,StudentLastName,StudentAge,StudentCountryName) values('John','Smith',21,'US');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable(StudentFirstName,StudentLastName,StudentAge,StudentCountryName) values('Chris','Brown',20,'AUS');
Query OK, 1 row affected (0.19 sec)使用 select 語句顯示錶中的所有記錄 −
mysql> select *from DemoTable;
輸出
+-----------+------------------+-----------------+------------+--------------------+ | StudentId | StudentFirstName | StudentLastName | StudentAge | StudentCountryName | +-----------+------------------+-----------------+------------+--------------------+ | 30 | John | Smith | 21 | US | | 31 | Chris | Brown | 20 | AUS | +-----------+------------------+-----------------+------------+--------------------+ 2 rows in set (0.00 sec)
更新於： 30-7-2019
140 次瀏覽
廣告