Google大查询-如何使用SQL获取数据集中所有表的最近更新日期

Question

在Google大查询中，我需要提取给定数据集中所有表的最后更新日期。所以我需要的输出是<<TableName>> <<Last Update Date>>

我知道如何列出表格：

#standardSQL
SELECT 
  table_id,
  row_count
FROM `myproject.mydataset.__TABLES__`
WHERE table_id IN ('TABLEA', 'TABLEB', 'TABLEC')

如何获取上次更新日期而不是row_count？

谢谢

Answer 1

如果我正确理解了这个问题，请尝试以下操作-它包含您所要求的内容以及更多其他内容

#standardSQL
SELECT table_id,
    DATE(TIMESTAMP_MILLIS(creation_time)) AS creation_date,
    DATE(TIMESTAMP_MILLIS(last_modified_time)) AS last_modified_date,
    row_count,
    size_bytes,
    CASE
        WHEN type = 1 THEN 'table'
        WHEN type = 2 THEN 'view'
        WHEN type = 3 THEN 'external'
        ELSE '?'
    END AS type,
    TIMESTAMP_MILLIS(creation_time) AS creation_time,
    TIMESTAMP_MILLIS(last_modified_time) AS last_modified_time,
    dataset_id,
    project_id
FROM `myproject.mydataset.__TABLES__`