| const e=JSON.parse('{"key":"v-1349f701","path":"/zh/UserGuide/Master/stage/Operators-Functions/Aggregation.html","title":"聚合函数","lang":"zh-CN","frontmatter":{"description":"聚合函数是多对一函数。它们对一组值进行聚合计算，得到单个聚合结果。 除了 COUNT(), COUNT_IF()之外，其他所有聚合函数都忽略空值，并在没有输入行或所有值为空时返回空值。 例如，SUM() 返回 null 而不是零，而 AVG() 在计数中不包括 null 值。 IoTDB 支持的聚合函数如下： 函数名 功能描述 允许的输入类型 必要的属...","head":[["link",{"rel":"alternate","hreflang":"en-us","href":"https://iotdb.apache.org/UserGuide/Master/stage/Operators-Functions/Aggregation.html"}],["meta",{"property":"og:url","content":"https://iotdb.apache.org/zh/UserGuide/Master/stage/Operators-Functions/Aggregation.html"}],["meta",{"property":"og:site_name","content":"IoTDB Website"}],["meta",{"property":"og:title","content":"聚合函数"}],["meta",{"property":"og:description","content":"聚合函数是多对一函数。它们对一组值进行聚合计算，得到单个聚合结果。 除了 COUNT(), COUNT_IF()之外，其他所有聚合函数都忽略空值，并在没有输入行或所有值为空时返回空值。 例如，SUM() 返回 null 而不是零，而 AVG() 在计数中不包括 null 值。 IoTDB 支持的聚合函数如下： 函数名 功能描述 允许的输入类型 必要的属..."}],["meta",{"property":"og:type","content":"article"}],["meta",{"property":"og:locale","content":"zh-CN"}],["meta",{"property":"og:locale:alternate","content":"en-US"}],["meta",{"property":"og:updated_time","content":"2023-10-25T10:37:38.000Z"}],["meta",{"property":"article:modified_time","content":"2023-10-25T10:37:38.000Z"}],["script",{"type":"application/ld+json"},"{\\"@context\\":\\"https://schema.org\\",\\"@type\\":\\"Article\\",\\"headline\\":\\"聚合函数\\",\\"image\\":[\\"\\"],\\"dateModified\\":\\"2023-10-25T10:37:38.000Z\\",\\"author\\":[]}"]]},"headers":[{"level":2,"title":"COUNT_IF","slug":"count-if","link":"#count-if","children":[{"level":3,"title":"语法","slug":"语法","link":"#语法","children":[]},{"level":3,"title":"使用示例","slug":"使用示例","link":"#使用示例","children":[]}]},{"level":2,"title":"TIME_DURATION","slug":"time-duration","link":"#time-duration","children":[{"level":3,"title":"语法","slug":"语法-1","link":"#语法-1","children":[]},{"level":3,"title":"使用示例","slug":"使用示例-1","link":"#使用示例-1","children":[]}]},{"level":2,"title":"COUNT_TIME","slug":"count-time","link":"#count-time","children":[{"level":3,"title":"语法","slug":"语法-2","link":"#语法-2","children":[]},{"level":3,"title":"使用示例","slug":"使用示例-2","link":"#使用示例-2","children":[]}]}],"git":{"createdTime":1698230258000,"updatedTime":1698230258000,"contributors":[{"name":"wanghui42","email":"105700158+wanghui42@users.noreply.github.com","commits":1}]},"readingTime":{"minutes":5.49,"words":1646},"filePathRelative":"zh/UserGuide/Master/stage/Operators-Functions/Aggregation.md","localizedDate":"2023年10月25日","autoDesc":true}');export{e as data}; |