sqlite

SQLite 学习资源汇总,Android/iOS/嵌入式开发必备

不打扰是莪最后的温柔 提交于 2020-02-14 13:17:22
文章目录 在线网站 开发工具 经典图书 程序驱动 衍生产品 SQLite 是一个纯 C 语言实现的自包含、无服务器、零配置、事务型的嵌入式 SQL 数据库引擎。 SQlite 是世界上安装最多的数据库,超过了 1 万亿次;所有的 Android、iPhone 手机和 iOS 设备、Windows10 系统、Firefox、Chrome、Safari 浏览器以及无数的嵌入式设备和 APP 应用都使用 SQLite 作为本地存储,编程语言 PHP 和 Python 自带 SQlite 支持。 SQLite 虽然小巧(几百 KB),但是支持 完整的 SQL 功能 ,非常值得我们学习和使用。本文整理了一些常见的 SQLite 学习资源,供大家参考。 我的博客也会定期更新关于数据库管理和 SQL 开发的实用文章,欢迎关注❤️、点赞👍、转发📣! 在线网站 SQLite 官方网站 - SQLite 官方网站,首选推荐。 SQLite 官方文档 - SQLite 官方文档,英文版。 SQLite 教程 - 编程狮(W3C) 上的 SQLite 教程。 SQLite 教程 - 菜鸟教程上的 SQLite 教程。 SQLite Tutorial - SQLite 英文教程,自带在线 运行环境 。 开发工具 sqlite3 - 官方提供的 SQLite 命令行工具,以及 使用手册 。 DB4S -

SQLite Exception: no such table Error [duplicate]

不问归期 提交于 2020-02-10 03:27:05
问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Android Sqlite - “No Such Table” Error We are trying to develop an application on Android. We are using SQLite database and on phone we are getting SQLiteException:no such table. It is working fine on simulator. Can anyone provide any input on this? 回答1: If you don't specify the database file name correctly I believe it falls back to creating an empty database. This is generally the cause of 'table not found'.

SQLite Exception: no such table Error [duplicate]

只谈情不闲聊 提交于 2020-02-10 03:25:14
问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Android Sqlite - “No Such Table” Error We are trying to develop an application on Android. We are using SQLite database and on phone we are getting SQLiteException:no such table. It is working fine on simulator. Can anyone provide any input on this? 回答1: If you don't specify the database file name correctly I believe it falls back to creating an empty database. This is generally the cause of 'table not found'.

svn cleanup failed–previous operation has not finished 解决方法

馋奶兔 提交于 2020-02-09 02:53:00
   今天svn遇到一个头疼的问题,最开始更新的时候失败了,因为有文件被锁住了。按照以往的操作,我对父目录进行clean up操作,但是clean up 操作也失败了! svn cleanup failed–previous operation has not finished; run cleanup if it was interrupted   cleanup 失败,失败的信息里又叫我cleanup,这是一个死循环。。。到google搜索解决问题,最后终于找到一个有效的解决办法。 Usually, an svn cleanup fixes most issues with tortoise svn. However, I ran into an issue which caused me some grief. The specific error I was seeing: Previous operation has not finished; run 'cleanup' if it was interrupted Solution: Somehow, svn is stuck on the previous operation. We need to remove this operation from it’s ‘work queue’. The data is

sqlite数据库注入

假装没事ソ 提交于 2020-02-08 18:03:41
sqlite数据库大部分在开发时使用,其注入语句也与其他数据库不同 sqlite数据库有一张sqlite_master表,里面有type/name/tbl_name/rootpage/sql记录着用户创建表时的相关信息 sqlite数据库的注释符是两个横杠“--”,空格会自动用加号表示 测试回显位置, /new_list.php?id=1 union select 1,2,3,4 开始爆这个表的字段值/new_list.php?id=1 and 1=2 union select 1,name,sql,4 from sqlite_master 直接查/new_list.php?id=1 union select 1,name,password,4 from WSTMart_reg 附参考地址:https://blog.csdn.net/qq_39936434/article/details/94722615 来源: https://www.cnblogs.com/weak-chicken/p/12283925.html

SQLAlchemy: dealing with CP-1252 data when Python is expecting it to be UTF-8

﹥>﹥吖頭↗ 提交于 2020-02-08 09:51:31
问题 I am working with an existing SQLite database and experiencing errors due to the data being encoded in CP-1252, when Python is expecting it to be UTF-8. >>> import sqlite3 >>> conn = sqlite3.connect('dnd.sqlite') >>> curs = conn.cursor() >>> result = curs.execute("SELECT * FROM dnd_characterclass WHERE id=802") Traceback (most recent call last): File "<input>", line 1, in <module> OperationalError: Could not decode to UTF-8 column 'short_description_html' with text ' <p>Over a dozen deities

使用Qt开发Github中的开源项目

*爱你&永不变心* 提交于 2020-02-07 23:57:06
游戏2D地图编辑器 : 著名的TileMap编辑器,做2D游戏开发的一定不会陌生。 Go 语言的IDE : Go语言的集成开发环境。 Clementine Music Player : 功能很完善且跨平台支持做得很好的音乐播放器,完成度高,跨平台项目可以参考它。 QtAV (FFmpeg的Qt封装): 官网:http://www.qtav.org/ FFmpeg的Qt封装,国人的作品,为你点赞! shotcut (视频编辑软件): 产品级的开源作品,值得研究。 qTox (IM客户端): 功能强大的IM客户端 livehelperchat (IM客户端): 基于XMPP 协议的聊天客户端 qupzilla (Qt开发的Web浏览器): 产品级的开源作品,值得研究。 otter-browser (另一款浏览器): Qt开发的Web浏览器 CuteMarkEd (Qt开发的Markdown编辑器) Rythem (Qt版的fiddler) 网络文件传输客户端 官网:https://nitroshare.net/ ProjectTox-Qt-GUI (简版IM) screencloud (截屏分享工具) notes (记事本) QFramer :(UI封装,国人作品) OAuth 2.0 for Qt JQTools , Jason Qt Tools 的简称 QtAwesome

python Sqlite3相关基本操作

試著忘記壹切 提交于 2020-02-07 18:45:45
1、连接数据库 1 import sqlite3 2 3 conn = sqlite3.connect('test.db') 2、创建表 1 import sqlite3 2 3 conn = sqlite3.connect('test.db') 4 print "Opened database successfully"; 5 c = conn.cursor() 6 c.execute('''CREATE TABLE COMPANY 7 (ID INT PRIMARY KEY NOT NULL, 8 NAME TEXT NOT NULL, 9 AGE INT NOT NULL, 10 ADDRESS CHAR(50), 11 SALARY REAL);''') 12 print "Table created successfully"; 13 conn.commit() 14 conn.close() 3、INSERT 操作 1 import sqlite3 2 3 conn = sqlite3.connect('test.db') 4 c = conn.cursor() 5 print "Opened database successfully"; 6 7 c.execute("INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) \

Minimising Sqlite db size when indexing 2M files with long paths

限于喜欢 提交于 2020-02-07 03:50:11
问题 I need to index around 2 million files on each of several linux systems and I am worried the naive way to do this might create an unnecessarily large data file because of the longish path names (IE the text of an average path, perhaps /home/user/Android/gradle/blah/blah/blah/filename, times 2 million). Assuming I put the filename in a column of its own and the path in a different column, with identical text (ie the full path) which is repeated frequently in a table, will Sqlite automatically

SQlite updating column numbers in java

倖福魔咒の 提交于 2020-02-06 08:30:52
问题 I have a scenario where number of columns is 2600. As mentioned in SQLite limits the maximum column supported is 2000. Now I need to update the column numbers during run time, the definition, The maximum number of columns can be lowered at run-time using the sqlite3_limit(db,SQLITE_LIMIT_COLUMN,size) interface. is not clear to me. The code I'm using is, Class.forName("org.sqlite.JDBC"); conn = DriverManager.getConnection("jdbc:sqlite:database.db"); conn.setAutoCommit(false); stmt = conn