How to query by time in postgresql?

@samara 

To query by time in PostgreSQL, you can use the EXTRACT function to extract the hour, minute, or second from a timestamp or time data type column. Here are a few examples of how you can query by time in PostgreSQL:

1. To select records where the time is after a certain hour:

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SELECT * FROM table_name WHERE EXTRACT(HOUR FROM time_column) > 12;

1. To select records where the time is between a certain range of hours:

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SELECT * FROM table_name WHERE EXTRACT(HOUR FROM time_column) BETWEEN 9 AND 17;

1. To select records where the time is before a certain hour:

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SELECT * FROM table_name WHERE EXTRACT(HOUR FROM time_column) < 9;

You can also extract minutes or seconds using the MINUTE and SECOND keywords in the EXTRACT function. Remember to replace table_name and time_column with your actual table and column names.