Question

我需要从MYSQL DB中提取数据并根据数据创建格式化文件。我怎么能通过Talend open studio做到这一点??

MySQL DB有一个表（user_id，order_id，purchase_date），我需要为每个用户生成csv文件包含他的订单。文件名应该有user_id（输出文件可以像user_id.csv）

由于

Answer 1

You can try below - 
tMysqlInput--->tFlowToIterate---(iterate)-->tMysqlInput--->tFileOutputDelimited

More details given below - 
tmysqlInput(select user_id from table group by user_id) --- row Main ---> tFlowToIterate (uncheck use the default key option, create a new key called user_id and set value to user_id in dropdown) ----- Iterate -----> tmysqlInput(sql = "select user_id, order_id,purchase_date from table where user_id=((String)globalMap.get("user_id))") ----- row main ----> tFileOutputDelimited(set filename = (String)globalMap.get("user_id))+".csv").

        to summarize - you first get list of all distinct user_id then you iterate through each of them and again fetch orders for each user_id by applying filter and use this user_id value from global variable into filename..

如何在Talend open studio中基于MySQL表生成多个格式化文件？

1 个答案: