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数据连接

数据连接是进行所有数据分析之前的首要步骤，搭建原始数据与 Wyn 之间的桥梁，获取数据。

本章将详细介绍 Wyn 系统中各种数据源连接的相关操作。

Wyn 支持所有关系型数据库，并且特别为常用的 Oracle、SQLServer、MySQL、Postgres、SQLite 等多种数据库提供了专门的数据源接口（DataProvider）。

另外，您也可以通过上传已有的文件导入数据，如 CSV、Json、Excel及Xml格式的文件。此时，数据会被抽取进 Wyn 的数据仓库。

而对于 JSON 数据源，您甚至可以将数据来源从静态的 JSON 文件替换为动态的 URL 地址，从其他业务系统实时抓取动态数据。

type=info
提示
在 Wyn 中，数据源作为其他文档的基础，应该是一个相对稳定的文档，不宜经常修改。对数据源进行任何更改，尤其是影响数据查询的信息修改，都可能会影响依赖该数据源的其他文档。
因此，更新数据源后，需要您重新打开使用该数据源的数据集或模型，确认查询结果正确后，重新保存。