# -*- coding: utf-8 -*-

 import sqlite3

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

 cur = conn.cursor()

 test_sql1 = "INSERT INTO test (name) VALUES ('我爱中国')"    #gbk编码，存入数据库的时候显示的是乱码

 cur.execute(test_sql1)

 conn.commit()

 cursor = cur.execute("SELECT name from test")

 for row in cursor:

     print(row[0])    #因为读取的是GBK编码内容，所以可以直接显示
 

 test_sql2 = "INSERT INTO test (name) VALUES ('我爱中国')".decode('GBK')    #unicode编码

 cur.execute(test_sql2)

 conn.commit()
 

 cursor = cur.execute("SELECT name from test")

 for row in cursor:

     print(row[0].decode('utf-8'))    #即使用的是Unicode写入的数据库，内部还是使用的UTF-8编码存入，所以需要使用UTF-8解码

     print(row[0].decode('utf-8').encode('GBK'))    #输出的时候可以使用Unicode输出也可以使用本地的GBK输出
 

 test_sql3 = test_sql2.encode('utf-8')    #utf-8编码

 cur.execute(test_sql3)

 conn.commit()
 

 cursor = cur.execute("SELECT name from test")

 for row in cursor:

     print(row[0].decode('utf-8'))

     print(row[0].decode('utf-8').encode('GBK'))

 select_sql1 = "SELECT name from test where name = '我爱中国'"    #以GBK格式查询

 cursor = cur.execute(select_sql1)

 for row in cursor:

     print(row[0].decode('utf-8'))

     print(row[0].decode('utf-8').encode('GBK'))

 #查询不到结果
 6

 select_sql2 = "SELECT name from test where name = '我爱中国'".decode('GBK')    #以Unicode格式查询

 cursor = cur.execute(select_sql2)

 for row in cursor:

     print(row[0].decode('utf-8'))

     print(row[0].decode('utf-8').encode('GBK'))

 select_sql3 = "SELECT name from test where name = '我爱中国'".decode('GBK').encode('utf-8')    #以utf-8格式查询

 cursor = cur.execute(select_sql3)

 for row in cursor:

     print(row[0].decode('utf-8'))

     print(row[0].decode('utf-8').encode('GBK'))