[3.1.查看所有数据库](3.1.%E6%9F%A5%E7%9C%8B%E6%89%80%E6%9C%89%E6%95%B0%E6%8D%AE%E5%BA%93.md) [3.2.创建新数据库](3.2.%E5%88%9B%E5%BB%BA%E6%96%B0%E6%95%B0%E6%8D%AE%E5%BA%93.md) [3.3.查看数据库创建信息](3.3.%E6%9F%A5%E7%9C%8B%E6%95%B0%E6%8D%AE%E5%BA%93%E5%88%9B%E5%BB%BA%E4%BF%A1%E6%81%AF.md) [3.4.删除现有数据库](3.4.%E5%88%A0%E9%99%A4%E7%8E%B0%E6%9C%89%E6%95%B0%E6%8D%AE%E5%BA%93.md) [3.5.修改现有数据库](3.5.%E4%BF%AE%E6%94%B9%E7%8E%B0%E6%9C%89%E6%95%B0%E6%8D%AE%E5%BA%93.md) [3.6.选择（使用）某个数据库](3.6.%E9%80%89%E6%8B%A9%EF%BC%88%E4%BD%BF%E7%94%A8%EF%BC%89%E6%9F%90%E4%B8%AA%E6%95%B0%E6%8D%AE%E5%BA%93.md)