In-Memory Database An SQLite database is normally stored on disk but the database can also be stored in memory. Read more aboutSQLite in-memory databases here. Data Source=:memory:;Version=3;New=True; SQLite Using UTF16 Data Source=c:\mydb.db;Version=3;UseUTF16Encoding=True; ...
importjava.sql.Connection;importjava.sql.DriverManager;importjava.sql.ResultSet;importjava.sql.Statement;publicclassInMemoryDatabaseExample{publicstaticvoidmain(String[]args){try{// 连接到内存数据库Connectionconnection=DriverManager.getConnection("jdbc:sqlite::memory:");// 创建表Statementstatement=connection....
[Table("user")]publicclassUser{// PrimaryKey is typically numeric[PrimaryKey, AutoIncrement, Column("_id")]publicintId {get;set; } [MaxLength(250), Unique]publicstringUsername {get;set; } ... } 定义C# 类后,对SQLiteConnection类调用泛型方法CreateTable以在数据库中生成表。 将类指定为类型参数。
Mode=SqliteOpenMode.ReadWriteCreate, Password="somePassword"}.ToString();varconnection =newSqliteConnection(connectionString); connection.Open();varquery ="ATTACH DATABASE 'file:InMemorySample?mode=memory&cache=shared' AS inMemDb KEY ''; SELECT sqlcipher_export('inMemDb'); DETACH DATABASE inMem...
MEMORY:在这种模式下,日志文件被存储在内存中,而不是在磁盘上。这种模式的性能最好,但是如果系统崩溃,所有未提交的事务都会丢失。 WAL:这是 Write-Ahead Logging 模式。在这种模式下,所有的更改首先被写入到一个单独的日志文件(WAL文件),然后在事务提交时被写入到主数据库文件。这种模式提供了最好的并发性能。
connection pool size to 1// for non-WAL databases. There might be reasons to use connection pooling// with other journal modes. However, we should always keep pool size of 1 for in-memory// databases since every :memory: db is separate from another.// For now, enabling connection ...
pInMemory 指数据连接句柄指针; 装载数据库文件,指在sqlite>.backup '/ruiy.db'中备份的数据库数据到当前连接的sqlite数据库,或是保存当前连接的数据库数据库数据到数据库文件;in-memory database, zFileName 指保存或恢复的数据库database file文件;
Connection connection = DriverManager.getConnection("jdbc:sqlite::memory:");Statement st = connection.createStatement();st.execute("restore from d:/ex1");ResultSet rs = st.executeQuery("SELECT * FROM orders");SQLite 提供了标准的 SQL 语法，常规的数据处理和计算都没有问题。特别地，SQLite 已经能...
.save FILE Write in-memory database into FILE .scanstats on|off Turn sqlite3_stmt_scanstatus() metrics on or off .schema ?PATTERN? Show the CREATE statements matching PATTERN .selftest ?OPTIONS? Run tests defined in the SELFTEST table .separator COL ?ROW? Change the column and row separa...
as &dyn ToSql);}stmt.execute(&*param_values).unwrap();}}}fn main() {let conn = Connection::open("basic_batched.db").unwrap();conn.execute_batch("PRAGMA journal_mode = OFF;PRAGMA synchronous = 0;PRAGMA cache_size = 1000000;PRAGMA locking_mode = EXCLUSIVE;PRAGMA temp_store = MEMORY...