[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC):2025-07-31。"],[],[],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)"]]