How can I assign a result from a SQL query to a variable?

Data and Databases
1

I’m trying to store the output of a SQL query into a variable but it’s not working as I expected. I attempted something like this:

DECLARE @uniqueVar UNIQUEIDENTIFIER;

SELECT @uniqueVar = new_modelID
FROM ModelTable
WHERE regionName = 'Eastern Shore';

I would appreciate any suggestions or alternative solutions to make this work correctly. Thanks!

2

hey, try to use set insted of select for assignmnt and verify your var is declared in same scope; sql can be quirky sometimes, so double-check your naming too!

3

In my experience, ensuring that the variable declaration and its assignment reside in the same execution scope is key. I faced issues when a query returned multiple rows, which disrupted the assignment process. I found that validating the uniqueness of the record by refining the WHERE clause helped prevent such errors. It is also critical to double-check that the data type of the variable matches the data type of the column being assigned. Using SELECT for assignment worked well once I addressed these potential pitfalls.

4

hey, im wondering if your query might be retuning multiples rows? try verifying that only one result is returned. curious, have you tried testing the variable in a simple query to see if it persists correctly? any other troubleshooting tips you used?