如何在 python 中打印 bigquery 的计数 table 查询?

How to print count table query of bigquery in python?

我正在尝试打印 python 中 bigquery table 中可用的行数,我编写了以下代码:

from google.cloud import bigquery def main():
    myquery = "select count(*) from `myproject.mydataset.mytable`"
    client = bigquery.Client()
    job = client.query(myquery)
    result = job.result()
    print("Total rows available: ",result)

当我执行上面的代码时,它给我输出

"Total rows available: google.cloud.bigquery.table.RowIterator object at 0x00000247B65F29E8>".

这意味着我正在获取对象值作为我的输出。 但是我想打印 table(query result) 中可用的实际行数。

RowIterator has an attribute called total_rows.

只需将您的最后一条语句更改为

 print("Total rows available: ", result.total_rows)

尝试将您的查询更改为

myquery = "select count(*) size from `myproject.mydataset.mytable`"
client = bigquery.Client()
job = client.query(myquery)
result = job.result()
for row in results:
    print("Total rows available: ",row.size)