修改文档说明

README.md

@@ -43,6 +43,13 @@ String tableId = operation.createTable("HelloTable", "#分组Id（可选）");
 
 ### 更新表数据
 
+数据的格式采用csv文件存储，格式如下，假设文件名为data.csv,其内容为：
+
+```
+"合同签约时间(Year Month Day)","城市","国家","客户名称","省份","回款金额","合同金额"
+"18/1/2016","杭州市","中国","浙江臻善科技有限公司","浙江省","1200000","1200000"
+```
+
 ```java
 Authentication authentication = new Authentication("#key", "#secret");
 DatasourceOperation operation = new DatasourceOperation(authentication);