| <#ftl output_format="plainText"> |
| <#-- |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| http://www.apache.org/licenses/LICENSE-2.0 |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| --> |
| <#assign csvParser = CSVTool.parse(DataSources.get(0))> |
| <#assign users = DataFrameTool.fromCSVParser(csvParser)> |
| |
| Original Data |
| ============================================================================= |
| ${DataFrameTool.print(users)} |
| |
| Select By Age |
| ============================================================================= |
| ${DataFrameTool.print(users.select("(age > 40)"))} |
| |
| Select By Name & Country |
| ============================================================================= |
| <#assign country = "Germany"> |
| ${DataFrameTool.print(users |
| .select("(name == 'Schmitt' || name == 'Meier') && country == '${country}'") |
| .sort("name", DataFrameTool.sortOrder["ASCENDING"]))} |
| |
| Head of Users |
| ============================================================================= |
| ${DataFrameTool.print(users.head(2))} |
| |
| Count Column Values |
| ============================================================================= |
| ${DataFrameTool.print(users.getColumn("country").transform(DataFrameTool.transformer["COUNT"]))} |
| |
| Group By Age & Country |
| ============================================================================= |
| ${DataFrameTool.print(users.groupBy("country", "age").sort("country"))} |
| |
| |