30 lines
1.2 KiB
SQL
30 lines
1.2 KiB
SQL
-- 创建对话表
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CREATE TABLE IF NOT EXISTS conversations (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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title TEXT NOT NULL DEFAULT '新对话',
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
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);
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-- 创建消息表
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CREATE TABLE IF NOT EXISTS messages (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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conversation_id INTEGER NOT NULL,
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role TEXT NOT NULL CHECK (role IN ('user', 'assistant')),
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content TEXT NOT NULL,
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timestamp DATETIME DEFAULT CURRENT_TIMESTAMP,
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FOREIGN KEY (conversation_id) REFERENCES conversations(id) ON DELETE CASCADE
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);
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-- 创建索引以提高查询性能
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CREATE INDEX IF NOT EXISTS idx_messages_conversation_id ON messages(conversation_id);
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CREATE INDEX IF NOT EXISTS idx_messages_timestamp ON messages(timestamp);
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CREATE INDEX IF NOT EXISTS idx_conversations_updated_at ON conversations(updated_at);
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-- 插入示例数据
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INSERT OR IGNORE INTO conversations (id, title, created_at, updated_at)
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VALUES (1, '欢迎对话', datetime('now'), datetime('now'));
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INSERT OR IGNORE INTO messages (conversation_id, role, content, timestamp)
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VALUES
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(1, 'assistant', '你好！我是AI助手，很高兴为您服务。有什么我可以帮助您的吗？', datetime('now')); |