出现的原因: 由于unidac sqlite的LockingMode默认使用lmExclusive,如果代码不注意,很容易出现database is locked的问题。 解决方法: 将UniConnection1的LockingMode设为lmNormal就可以轻松解决database is locked这个问题。 注意:旧版本(unidac 9之前吧)的unidac好像没LockingMode UniConnection1.SpecificOptions.Values['...
使用sqlite3命令行查询数据条数: 解决办法: 1、使用数据库管理工具进行修复 安装SQLite Expert Professional数据库管理软件,参考:https://blog.csdn.net/fangye945a/article/details/96908513 使用SQLite Expert Professional 打开数据库,点击Database选项页,点击Repair按键进行修复。 选择new file,指定修复完成的数据库目标...
在并发访问sqlite数据库会出现这样一个错误:databseis locked,这是sqlite数据库对并发支持不太好的缘故造成的。采用网上的一种的思路是通过互斥信号量来达到并发访问的目的。下面是一个跨平台的互斥信号量类: //ProcessMutex.h文件: #ifndef __PROCESS_MUTEX_H__ #define __PROCESS_MUTEX_H__ #if defined _WI...
1 private static final String DATABASE_NAME="test"; 2 public SQLiteHelper(Context context, String name, CursorFactory factory, 3 int version) { 4 super(context, name, factory, version); 5 this.getWritableDatabase(); 6 // TODO Auto-generated constructor stub 7 } 8 9 @Override 10 public vo...
SELECT tbl_name FROM sqlite_master WHERE type==”table” The SQLite database maintains a table named sqlite_master; this table contains a column named tbl_name, which describes each of the tables in the database. Executing this SELECT statement allows us to see tables in the Skype main.db...
SQLITE_CORRUPT 结果代码表明数据库文件已损坏。数据集对应的存储文件已损坏。 数据库损坏:将不正确的数据引入数据库文件或日志中间的硬件或操作系统故障将导致问题,如果恶意进程打开数据库文件或日志并将格式错误的数据写入其中,则数据库将损坏。对这类问题无能为力。 POSIX 咨询锁来实现问题: 数据丢失:SQLite 在 Uni...
sqlite是嵌入式SQL数据库引擎SQLite(SQLite Embeddable SQL Database Engine)的一个扩展。 SQLite是一个实现嵌入式SQL数据库引擎小型C语言库(C library),实现了独立的,可嵌入的,零配置的SQL数据库引擎。特性包括:事务操作是原子,一致,孤立,并且持久的,即使在系统崩溃和电源故障之后。零配置——不需要安装和管理。实现...
Any restructure operation is wrapped in a nested transaction which is rolled back if any errors occur when applying changes. Import and Export data Import data from ADO data source, CSV files, SQL script or SQLite. Export data to CSV files, SQL script, Excel or SQLite. ...
First create a directory in which to place the build products. It is recommended, but not required, that the build directory be separate from the source directory. Cd into the build directory and then from the build directory run the configure script found at the root of the source tree. ...
Regular use of SQLite databases leads to large amounts of data, which results in an increase in size over the well-defined limit. This is also one of the factors responsible for generating this error SQLite Database Disk Image Is Malformed. ...