Restcloud ETL practice data row column conversion

RestCloud ETL Community Edition is a data integration tool , Provide visual multi data pipeline construction 、 Data source management 、 Operation monitoring and authority management functions .

This article will simplify the table data in the figure below by converting multiple rows to multiple columns .

Simplify your thinking ： Turn the grades of different subjects in the same name into column names , Convert three rows of data in the database into one row of data for display .

The first is process design

Three components are used here , They are library table input 、 Convert multiple rows to multiple columns 、 Library table output , Library table input obtains table data , Then the data structure is redistributed from multiple rows to multiple columns , Then output the data into a new database table through the database table output .

Component configuration

1. Library table input

This is mainly used to obtain data , You only need to configure the data source and database tables , Make sure you can input data , Others are generated automatically .

2. Multi row to multi column

In the node where the data is located, select the node where the source data is located , Get the data that needs to be converted .

Select the field to be grouped in the grouping field , For example, according to the above database , There are three subjects under the same name , Then you can select XM This field .

Key fields id Here is the field to be selected to convert the value into a column .

Here, according to the key fields selected in the basic attributes id, Get key fields id In the value of the , Then according to this value, get the corresponding data in the data field and put it into the corresponding new target field .

3. Library table output

Here, select the output data source , And the name of the watch .

In field configuration, you need to configure the output fields and the new target fields after conversion , Remove unnecessary fields . If it has become a column name as a condition KCMC Fields and values have been assigned to the new field CJ Field .

Don't forget when exporting , If it is a new table, you need to select auto create table .

Run the process after configuration .

In the log, you can see the prompt that the table was successfully created and the data was successfully inserted .

Data has also been successfully written to the database .

 

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