Start DuckDB
打开内存数据库：
duckdb
或打开/创建持久化数据库文件：
duckdb my_database.duckdb
Common Commands
Show help:
duckdb -help
Check version:
duckdb -version
Example Workflow
# Start DuckDB with a persistent database
duckdb analytics.duckdb
# Inside DuckDB shell
CREATE TABLE users(id INTEGER, name VARCHAR);
INSERT INTO users VALUES (1, 'Alice');
SELECT * FROM users;
