order by desc psql

Order by Desc in PSQL

When working with SQL databases, it is common to sort the results of a query by one or more columns. In PostgreSQL (PSQL), the ORDER BY clause is used to accomplish this. By default, the sorting is done in ascending order. However, in some cases, it may be necessary to sort in descending order. This can be achieved by using the DESC keyword.

Syntax:

SELECT column_name(s)
FROM table_name
ORDER BY column_name DESC;

In the above syntax, replace column_name(s) with the name of the column or columns that you want to sort by. Replace table_name with the name of the table that contains the data you want to sort.

Example:

Let's say we have a table called sales with columns id, product_name, and sales_amount. We want to retrieve all rows from the table and sort them in descending order by sales amount. The query would look like this:

SELECT *
FROM sales
ORDER BY sales_amount DESC;

This would return all rows from the sales table, sorted by sales amount in descending order.

Multiple Columns:

If you want to sort by multiple columns, you can just specify them separated by commas in the ORDER BY clause. The sorting will be done in the order that you specify the columns.

Example:

Let's say we want to sort the sales table by product name first, and then by sales amount. The query would look like this:

SELECT *
FROM sales
ORDER BY product_name, sales_amount DESC;

This would return all rows from the sales table, sorted first by product name in ascending order, and then by sales amount in descending order.

In conclusion, sorting the results of a query in descending order can be accomplished in PSQL by using the ORDER BY clause and the DESC keyword. You can sort by one or multiple columns, and the syntax is simple and easy to use.