How to declare a variable in a PostgreSQL query

Question

How do I declare a variable for use in a PostgreSQL 8.3 query?

In MS SQL Server I can do this:

DECLARE @myvar INT
SET @myvar = 5

SELECT *
FROM somew         


        

Answer 1

You may resort to tool special features. Like for DBeaver own proprietary syntax:

@set name = 'me'
SELECT :name;
SELECT ${name};

DELETE FROM book b
WHERE b.author_id IN (SELECT a.id FROM author AS a WHERE a.name = :name);