How to use EXTRACT Function In SQL
The EXTRACT function is used to extract the epoch value from the date column and the specified date. It then compares the epoch values, providing a numeric basis for date comparison.
Syntax:
SELECT * FROM your_table
WHERE EXTRACT(EPOCH FROM your_date_column) > EXTRACT(EPOCH FROM date_value::timestamp);
Replace your_date_column with the name of the column containing the date datatype and your_table with the name of the table. Change date_value to the desired value found in the column.
Query:
SELECT * FROM sample_table
WHERE EXTRACT(EPOCH FROM date_column) > EXTRACT(EPOCH FROM '2022-02-23'::timestamp);
Output:
Explanation: The given SQL query retrieves rows from the “sample_table” where the “date_column” is later than ‘2022-02-23’. The output would include dates ‘2022-02-24‘, ‘2022-02-25‘, ‘2022-02-26‘, ‘2022-02-27‘.
How to Query for All Dates Greater Than a Certain Date in PostgreSQL?
When working with temporal data, a common task in PostgreSQL is to query for all dates greater than a given date. PostgreSQL has several methods for executing these kinds of queries, providing flexibility according to particular needs and preferences.
Through the use of date functions, intervals, or basic comparison operators, users can effectively filter and obtain pertinent data from a PostgreSQL database, enabling efficient analysis and reporting.
In this article, we will examine various approaches to running date-based queries in PostgreSQL and show how to use them to retrieve entries that have dates that are more than a predetermined threshold.