Question

Create a procedure to add "O" to the invoice if it is null. Select the correct SQL.

Answer 1

To add an "O" to the invoice when it is null in a SQL database, create a stored procedure that uses an UPDATE statement with a WHERE clause that checks for null values in the InvoiceNumber field.

Step-by-step explanation:

To add an "O" to the invoice field in a SQL database when the value is null, you would use an UPDATE statement combined with a WHERE clause that checks for null values. Here's how you could write such a procedure:

CREATE PROCEDURE AddOToInvoice AS
BEGIN
UPDATE Invoices
SET InvoiceNumber = 'O'
WHERE InvoiceNumber IS NULL;
END;

This SQL script creates a stored procedure named AddOToInvoice that, when executed, will find all records in the Invoices table where the InvoiceNumber is null and set them to "O". Remember to replace 'Invoices' and 'InvoiceNumber' with the actual table and column names from your database.