To extract a date (yyyy-mm-dd) from a timestamp value

For example, you want to extract from '2018-07-25 10:30:30' to '2018-07-25'

1. Extract from a timestamp column:

Use date() function:

SELECT DATE(column_name) FROM table_name;

2. Extract date from a specific timestamp value:

Cast the timestamp to a date by adding ::date suffix:

SELECT '2018-07-25 10:30:30'::TIMESTAMP::DATE;

Or combine date() and substring() function:

SELECT DATE(SUBSTRING('2018-07-25 10:30:30' FROM 1 FOR 10));

Extract date from a timestamp

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