In SQL Server, in some cases, you may want to format the IBAN number.

You can easily do this using the code below.

DECLARE @iban VARCHAR(50) = 'TR320010009999901234567890';

SELECT
	CONCAT(SUBSTRING(@iban, 1, 2), ' ', SUBSTRING(@iban, 3, 4), ' ',
	SUBSTRING(@iban, 7, 4), ' ', SUBSTRING(@iban, 11, 4), ' ',
	SUBSTRING(@iban, 15, 4), ' ', SUBSTRING(@iban, 19, 4), ' ',
	SUBSTRING(@iban, 23, 4)) AS 'Formatlı IBAN';

When you run the above query, you will see a result similar to the one below.

As you can see, we have formatted the IBAN number.

Good luck to everyone in business and life.

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