sqlite3 数据库操作指令

  • 导入数据库

  • 连接数据库

  • 创建游标

  • 创建表

  • 常用增删改查

  • 结束操作

导入数据库

import sqlit3

连接数据库

conn = sqlite3.connent("test.db")

创建游标

cursor = connn.cursor()

创建表

sql = "create table login(id varchar(20) primary key, name varchar(30), password varchar(30))"cursor.execute(sql)

常用增删改查

# 查看表结构cur.execute("PRAGMA table_info(jobs)")# 表中增加字段cur.execute("alter table WeakManager add release_time text")# 重命名表alter table tema rename to team2;# 删除表中字段password（不支持删除列）alter table wx_userInfo drop column password;# 删除表cur.execute("drop table WeakManager")# 删除数据delete from wx_userInfo where id=3;# 添加数据insert into table_name(v1, v2) values (v1, v2);cur.execute("insert into people values (?, ?)", (who, age))cur.execute("select * from people where name=:who and age=:age",{"who": who, "age": age})-- 修改数据update wx_userInfo set name='bbb',nickName='bbb' where openID='xxxxxx';-- 在原有数据上增加数据update wx_userInfo set control_order=control_order||'on_off=0' where _id=40;-- 查询所以数据select * from wx_userInfo;-- 查询指定数量条数select * from wx_userInfo limit 3;-- 查询升序输出记录select * from wx_userInfo order by id asc;-- 查询降序输出记录select * from wx_userInfo order by id desc;-- 条件查询select * from wx_userInfo where id in('3');select * from wx_userInfo where id between 0 and 2;-- 查询指定字段记录数量统计select count(nickName) from wx_userInfo;select count(unionID) from wx_userInfo;-- 查询指定字段的数据(将指定字段可能重复的数据去掉，列出所有不同的数据）select distinct unionID from wx_userInfo;select distinct id from wx_userInfo;-- 查询最后一条数据，order by id desc 倒序，然后查找最后一条 limit 0,1select id, room_id,control_order,date_time from control_table order by id desc limit 0,1;

结束操作

# 1.提交事务conn.commit()# 2.关闭游标cursor.close()# 3.关闭连接conn.close()
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