物流轨迹查询中,获取查询结果前3条记录的最高效方式是哪项
conn = sqlite3.connect('logistics.db')
cursor = conn.cursor()
cursor.execute('''
SELECT track_id, location, timestamp
FROM tracking
WHERE package_id = ?
ORDER BY timestamp DESC''', ('PKG12345',))
# 获取最新轨迹
latest_record = cursor.fetchone()
正在加载题目数据…
子题
该题型需在试卷/作业中作答,单题练习暂不支持
答案解析