[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間:2025-07-31 (世界標準時間)。"],[],[],null,["# Aggregation\n\nThe method used to summarize data.\n\nIn general data science terms, an aggregation is \"a function or field where the values of multiple rows are grouped together as input on certain criteria to form a single value of more significant meaning or measurement.\" (Source: [Wikipedia](https://en.wikipedia.org/wiki/Aggregate_function))\n\nIn Looker Studio, fields can have the following aggregation methods:\n\n- `Average`\n- `Count`\n- `Count Distinct`\n- `Max`\n- `Min`\n- `Sum`\n- `Auto`\n- `None`\n\n`Auto` is applied by Looker Studio and can't be changed.\n\n`None` is applied to dimensions and unaggregated metrics. You can change this for metrics in the data source and report. If left as None in the data source, the default aggregation in reports is`Sum`.\n\nRelated resources\n-----------------\n\n- [About dimensions and metrics](/looker/docs/studio/model-your-data)\n- [What does the \"Unable to aggregate ratio metrics\" error mean?](/looker/docs/studio/what-does-the-unable-to-aggregate-ratio-metrics-error-mean)"]]