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How to Fetch the Latest Records In Postgresql?

3 minutes read

To fetch the latest records in PostgreSQL, you can use the ORDER BY clause in your SQL query along with the DESC keyword to sort the records in descending order based on a timestamp or date column. By using the LIMIT keyword, you can limit the result set to only the desired number of records, which in this case would be the latest records. This will ensure that the records returned by the query are the most recent ones in the database.


How to write a query to select the latest entries from a table in PostgreSQL?

To select the latest entries from a table in PostgreSQL, you can use the following query:

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SELECT * 
FROM your_table_name
ORDER BY created_at DESC
LIMIT n;


Replace your_table_name with the name of your table and created_at with the column that contains the timestamp of when the entry was created. The DESC keyword is used to order the entries in descending order so that the latest entries will be at the top. Finally, the LIMIT n clause will limit the result set to only the top n entries.


What is the SQL syntax to fetch the newest rows in PostgreSQL?

To fetch the newest rows in PostgreSQL, you can use the following SQL query:

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SELECT * 
FROM table_name 
ORDER BY created_at DESC 
LIMIT 10;


This query will fetch the 10 newest rows from the table_name table, sorted by the created_at column in descending order. You can adjust the LIMIT value to fetch a different number of rows.


What is the best practice to retrieve the latest entries in PostgreSQL?

One common and efficient way to retrieve the latest entries in PostgreSQL is to use the ORDER BY clause in combination with the LIMIT clause.


Here is an example query that retrieves the 10 most recent entries from a table called entries, sorted by a timestamp column called created_at in descending order:

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SELECT * 
FROM entries
ORDER BY created_at DESC
LIMIT 10;


This query will return the 10 most recent entries in the entries table. Adjust the LIMIT value to retrieve more or fewer entries as needed.


Additionally, make sure that you have an index on the created_at column to optimize the performance of the query, especially if you are dealing with a large amount of data.


What is the SQL command to fetch the latest records from multiple tables in PostgreSQL?

To fetch the latest records from multiple tables in PostgreSQL, you can use a query like this:

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SELECT * 
FROM (
  SELECT * 
  FROM table1 
  ORDER BY created_at DESC 
  LIMIT 1

  UNION ALL

  SELECT * 
  FROM table2 
  ORDER BY created_at DESC 
  LIMIT 1
) AS latest_records;


In this query, we first select the latest record from table1 using the ORDER BY and LIMIT clauses. Then we use the UNION ALL operator to combine the results with the latest record from table2. Finally, we alias the entire subquery as latest_records to fetch all the latest records from both tables.

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