How would you query specific partitions in a BigQuery table?

The correct answer is C. Use the __PARTITIONTIME pseudo-column in the WHERE clause. Explanation/Reference: Partitioned tables include a pseudo column named _PARTITIONTIME that contains a date-based timestamp for data loaded into the table. To limit a query to particular partitions (such as Jan 1st and 2nd of 2017), use a clause similar to this: WHERE…

Submitted by manish99· Mar 30, 2026Designing data processing systems

Question

How would you query specific partitions in a BigQuery table?

Options

AUse the DAY column in the WHERE clause
BUse the EXTRACT(DAY) clause
CUse the __PARTITIONTIME pseudo-column in the WHERE clause
DUse DATE BETWEEN in the WHERE clause

How the community answered

(37 responses)

A
3% (1)
B
11% (4)
C
81% (30)
D
5% (2)

Explanation

Explanation/Reference: Partitioned tables include a pseudo column named _PARTITIONTIME that contains a date-based timestamp for data loaded into the table. To limit a query to particular partitions (such as Jan 1st and 2nd of 2017), use a clause similar to this: WHERE _PARTITIONTIME BETWEEN TIMESTAMP('2017-01-01') AND TIMESTAMP('2017-01-02')

Topics

#partitioned tables#PARTITIONTIME#partition pruning#BigQuery SQL

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