How to use Temporary Tables In SQL
Temporary tables can be used to store and manipulate data within a session. we can take advantage of temporary tables to mimic variable declaration.
Query:
-- Create a temporary table
CREATE TEMP TABLE vars (num INTEGER);
-- Insert a value into the temporary table
INSERT INTO vars VALUES (10);
-- Select the value from the temporary table
SELECT num FROM vars;
Output:
Explanation: In this example, we first create a temporary table vars
with a single column num
of type INTEGER
. We then insert the value 10
into this temporary table. Finally, we select the value from the temporary table using the SELECT
statement. Temporary tables provide a way to store and retrieve variables within a SQLite session.
How to Declare a Variable in SQLite?
Declaring variables in SQLite can greatly enhance the flexibility and efficiency of our database queries. Whether we need to store temporary values, simplify complex operations or reuse values within a query, understanding how to declare variables in SQLite is very important.
In this article, we’ll explore the various methods and best practices for declaring variables in SQLite, which help us to write more dynamic and effective queries.