📅  最后修改于: 2023-12-03 15:05:20.142000             🧑  作者: Mango
SQLite 是一种关系型数据库管理系统,它被广泛使用在移动设备以及嵌入式系统中。下面是一些常用的 SQLite 命令及其使用方法。
sudo apt-get install sqlite3
sqlite3 [db_file]
CREATE TABLE [table_name] (
[column_name_1] [type_1],
[column_name_2] [type_2],
...
);
INSERT INTO [table_name] ([column_name_1], [column_name_2], ...) VALUES ([value_1], [value_2], ...);
UPDATE [table_name] SET [column_name_1] = [new_value_1], [column_name_2] = [new_value_2], ... WHERE [condition];
DELETE FROM [table_name] WHERE [condition];
SELECT [column_name_1], [column_name_2], ... FROM [table_name] WHERE [condition];
SELECT [column_name_1], [column_name_2], ... FROM [table_name_1] INNER JOIN [table_name_2] ON [table_name_1].[column_name_1] = [table_name_2].[column_name_2] WHERE [condition];
SELECT COUNT([column_name]), AVG([column_name]), SUM([column_name]), MAX([column_name]), MIN([column_name]) FROM [table_name] WHERE [condition];
以上是 SQLite 命令的一些常见用法,还有很多高级用法需要在实际使用中掌握。SQLite 简单易用,但是有时也会因为性能问题而受限。因此,在实际应用中,需要根据具体场景选择最适合的数据库管理系统。