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Node.js - PostgreSQL Find rows between two timestamps

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Created by:
Mahir-Bright
291

In this article, we would like to show you how to find rows between two absoluteΒ timestamps in the Postgres database from Node.js level.

Node.js - PostgreSQL Find rows between two timestamps
Table used in the example - HeidiSQL

Note:Β at the end of this article you can find database preparation SQL queries.

const pg = require('pg');

const types = pg.types;
types.setTypeParser(1114, (stringValue) => {
    return stringValue;
});

const client = new pg.Client({
    host: '127.0.0.1',
    user: 'my_username',
    database: 'my_database',
    password: 'my_password',
    port: 5432,
});

const fetchEventsBetween = async (fromDate, toDate) => {
	const query = `    
            SELECT *
            FROM "events"
            WHERE "event_timestamp" BETWEEN $1 AND $2
    `;
    await client.connect();  // creates connection
    try {
        const { rows } = await client.query(query, [fromDate, toDate]);  // sends query
        return rows;
    } finally {
        await client.end();  // closes connection
    }
};

fetchEventsBetween('2021-03-22', '2021-04-17')
    .then(result => console.table(result))
    .catch(error => console.error(error.stack));

Result:

β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”
β”‚ (index) β”‚ id β”‚    event_timestamp    β”‚
β”œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”Όβ”€β”€β”€β”€β”Όβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€
β”‚    0    β”‚ 3  β”‚ '2021-03-22 14:44:34' β”‚
β”‚    1    β”‚ 4  β”‚ '2021-03-22 15:45:35' β”‚
β”‚    2    β”‚ 5  β”‚ '2021-03-23 16:46:36' β”‚
β”‚    3    β”‚ 6  β”‚ '2021-04-05 17:47:37' β”‚
β”‚    4    β”‚ 7  β”‚ '2021-04-05 19:49:39' β”‚
β”‚    5    β”‚ 8  β”‚ '2021-04-16 20:50:40' β”‚
β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”΄β”€β”€β”€β”€β”΄β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜

Database preparation

create_tables.sqlΒ file:

CREATE TABLE "events" (
	"id" SERIAL PRIMARY KEY,
	"event_timestamp" TIMESTAMP NOT NULL
);

insert_data.sqlΒ file:

INSERT INTO "events" 
	("event_timestamp")
VALUES
    ('2021-03-11 11:41:31'),
    ('2021-03-21 12:42:32'),
    ('2021-03-22 14:44:34'),
    ('2021-03-22 15:45:35'),
    ('2021-03-23 16:46:36'),
    ('2021-04-05 17:47:37'),
    ('2021-04-05 19:49:39'),
    ('2021-04-16 20:50:40'),
    ('2021-04-17 15:45:35'),
    ('2021-04-23 16:46:36'),
    ('2021-04-23 19:49:39'),
    ('2021-04-23 20:50:40');

Native SQL query (used in the above example):

SELECT *
FROM "events"
WHERE "event_timestamp" BETWEEN '2021-03-22' AND '2021-04-17'

Node.js - PostgreSQL - dates

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