[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["缺少我需要的資訊","missingTheInformationINeed","thumb-down"],["過於複雜/步驟過多","tooComplicatedTooManySteps","thumb-down"],["過時","outOfDate","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["示例/程式碼問題","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間:2025-03-06 (世界標準時間)。"],[[["BigQuery external data sources allow you to query data from sources like AWS S3 and Azure Blob Storage directly without importing it into BigQuery."],["This feature enables efficient extract-load-transform (ELT) processes and joining BigQuery tables with frequently updated external data."],["Ads Data Hub users can leverage external data sources to combine their first-party data with Google advertising data for analysis."],["Connecting to external data sources involves setting up connections and permissions in both BigQuery and the external data source (AWS or Azure)."],["Data loading and querying can be automated through scheduled tasks for continuous data integration."]]],["External data sources enable querying data directly from other sources like Cloud Storage, S3, or Azure without migrating it to BigQuery. Use cases include ELT workloads and joining frequently changing data. To connect S3, create an AWS IAM policy and role, then create a BigQuery connection, add a trust relationship, and load/query data. For Azure Blob Storage, create an Azure application, make a BigQuery connection, add federated credentials, assign a role, and then load and query data.\n"]]