mysql select into Undeclared variable

If you encounter an "Undeclared variable" error while using the SELECT INTO statement in MySQL, it usually means that you haven't declared a variable before using it in the query.

To fix this issue, you need to declare the variable before using it in the SELECT INTO statement. Here's an example:

DECLARE @myVariable INT;

SELECT column_name
INTO @myVariable
FROM table_name
WHERE condition;

In this example, `@myVariable` is declared as an integer variable before using it in the SELECT INTO statement. Make sure to replace `column_name`, `table_name`, and `condition` with the appropriate values for your query.

Remember, the DECLARE statement is only required if you're using variables in your query. If you're not using variables and still encounter the error, please provide more details about your query for further assistance.