Python内置库SQLite3， Python使用SQLite不需要安装，直接使用

SQLite：轻量级，可嵌入，不能承受高并发访问，适合桌面，移动应用。

# SQLite数据库

import sqlite3

# 增 insert

conn = sqlite3.connect('test.db')

cursor = conn.cursor()

cursor.execute('create table user(id varchar(20) primary key, name varchar(20), age varchar(20))' )

cursor.execute('insert into user (id, name, age) values (\'2\', \'Jack\', \'18\')')

print(cursor.rowcount)

cursor.close()

conn.commit()

conn.close()

# 查 select...

conn = sqlite3.connect('test.db')

cursor = conn.cursor()

cursor.execute('select * from user where id=?', ('1', ))

cursor.execute('select * from user')

values = cursor.fetchall()

print(values)

cursor.close()

conn.commit()

conn.close()

# 改 update

conn = sqlite3.connect('test.db')

cursor = conn.cursor()

cursor.execute('update user set age=? where id=?', ('19', '1'))

cursor.execute('select * from user')

values = cursor.fetchall()

print(values)

cursor.close()

conn.commit()

conn.close()

# 删 delete

conn = sqlite3.connect('test.db')

cursor = conn.cursor()

cursor.execute('delete from user where id=?', ('2',))

cursor.execute('select * from user')

values = cursor.fetchall()

print(values)

cursor.close()

conn.commit()

conn.close()