数据源为报表的核心，新建报表时首先要添加源，然后选择数据库，定义查询语句。

注：数据库DemoData来自FlowPortal云演示数据库，可以直接连接使用，配置方法。

SQL查询语句：select Department as 部门,SalesVolume as 销售额, Targets as 目标额, ReturnedMoney as 回款额 from Sales

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