python2中在sqlite3中插入中文

# -*- 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'))

总结下来写入的时候可以使用Unicode或者UTF-8编码的字符写入数据库

读取输出的时候使用UTF-8编码或者GBK编码的字符输出

查询的语句也必须是Unicode或者utf-8格式才能查询到结果

UTF-8是可以支持直接的读取或者输出理想编码格式