SQLite安装部署、增、删、改、查与memory模式的性能测试
SQLite安装部署、增、删、改、查与memory模式的性能测试
一、SQLite安装
1. 下载sqlite的安装包
链接：https://pan.baidu.com/s/1KBiOUTBx8sAY165RIFB5BQ
提取码：7qt6
2. 编译安装
mkdir -p /opt/soft
#把安装下载到/opt/soft
tar zxvf /opt/soft/sqlite-autoconf-3330000.tar.gz -C /opt/soft/
mv /opt/soft/sqlite-autoconf-3330000 /opt/soft/sqlite
cd /opt/soft/sqlite
./configure --prefix=/usr/local
make && make install
二、SQLite基本操作
1. 创建库
mkdir -p /opt/sqlite
cd /opt/sqlite
sqlite3 test.db
2. 创建表
sqlite3 test.db
sqlite> create table test(pno INTEGER PRIMARY KEY AUTOINCREMENT ,num varchar(30) NOT NULL ,age INTEGER)
3. 插入数据
sqlite3 test.db
sqlite> insert into test(num,age) values(1,1);
4. 清空表
sqlite3 test.db
sqlite> delete from test; //清空数据
sqlite> update sqlite_sequence SET seq = 0 where name ='test';//自增长ID为0
4. 删除表
sqlite3 test.db
sqlite> drop table test;
5. 改数据
sqlite3 test.db
sqlite> update test set age=8 where pno=8;
6. 查
sqlite3 test.db
sqlite> select * from test;
7. 查看表结构
sqlite3 test.db
sqlite> .schema test
8. 已sql语句的形式列出表内容
sqlite3 test.db
sqlite> .dump test
三 、性能测试
1. 磁盘模式插入和读取100万条数据所用时间
#!/usr/bin/python
# -*- coding: utf-8 -*-
import time
import sqlite3
con = sqlite3.connect(":memory:")
# 获取cursor对象
cur = con.cursor()
# 执行sql创建表
cur.execute("create table t_person(pno INTEGER PRIMARY KEY AUTOINCREMENT ,pname varchar(30) NOT NULL ,age INTEGER)")
sql = 'insert into t_person(pname,age) values(1,1)'
start = time.time()
try:
for i in range(1, 1000001):
cur.execute(sql)
print('插入成功')
#打印插入数据所用时间
inster = time.time()
charu = inster - start
print("插入100万条数据总耗时为：%s" % charu)
cur.execute("select * from t_person")
print('读取成功')
#打印读取100万条数据
select = time.time()
duqu = select - inster
print("查询100万条数据总耗时为：%s" % duqu)
#提交事务
con.commit()
print('结束')
end = time.time()
alltime = end - start
print("插入读取100万条数据总耗时为：%s" % alltime)
except Exception as e:
print('插入失败')
con.rollback()
finally:
# 关闭游标
con.close()
# 关闭连接
con.close()
2. 内存模式插入和读取100万条数据所用时间
#!/usr/bin/python
# -*- coding: utf-8 -*-
import time
import sqlite3
con = sqlite3.connect("normal.db")
# 获取cursor对象
cur = con.cursor()
# 执行sql创建表
cur.execute("create table t_person(pno INTEGER PRIMARY KEY AUTOINCREMENT ,pname varchar(30) NOT NULL ,age INTEGER)")
sql = 'insert into t_person(pname,age) values(1,1)'
start = time.time()
try:
for i in range(1, 1000001):
cur.execute(sql)
print('插入成功')
#打印插入数据所用时间
inster = time.time()
charu = inster - start
print("插入100万条数据总耗时为：%s" % charu)
cur.execute("select * from t_person")
print('读取成功')
#打印读取100万条数据
select = time.time()
duqu = select - inster
print("查询100万条数据总耗时为：%s" % duqu)
#提交事务
con.commit()
print('结束')
end = time.time()
alltime = end - start
print("插入读取100万条数据总耗时为：%s" % alltime)
except Exception as e:
print('插入失败')
con.rollback()
finally:
# 关闭游标
con.close()
# 关闭连接
con.close()