Android SQLite全面详解的相关内容

Android SQLite (三 ) 全面详解（一）

官网 SQLite是一款轻型的数据库，是关系型数据库（RDBMS）管理系统，它包含在一个相对小的C库中。目前在很多嵌入式产品中使用了它，它占用资源非常的低，在嵌入式设备中，可能只需要几百K的内存就够了。它能够支持Windows/Linux/Unix/Android/IOS等等主流的操作系...

Android SQLite (四 ) 全面详解（二）

SQLite创建数据库创建数据库语法： sqlite3 DatabaseName.db 如下展示一个实例： SQLite附加数据库假设这样一种情况，当在同一时间有多个数据库可用，您想使用其中的任何一个。SQLite的ATTACH DTABASE语句是用来选择一个特定的数据库，使用该命...

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Android SQLite (五 ) 全面详解（三）

SQLite约束约束是在表的数据列上强制执行的规则。这些是用来限制可以插入到表中的数据类型。这确保了数据库中数据的准确性和可靠性。约束可以是列级或表级。列级约束仅适用于列，表级约束被应用到整个表。以下是在SQLite中常用的约束： NOT NULL约束：确保某列不能有NULL值。 DEFAULT...

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