SQL SERVER为现有表的每一行插入新列值

Question

I have an existing table of customers. I want to add a NEW row for each customer based on ALL of the services our company offers.

AS IS:

Customer - ID
Freddy - 123

TO BE:

Customer - ID - Service
Freddy - 123 - Serv1
Freddy - 123 - Serv2
Freddy - 123 - Serv3

etc ...

Right now I have been working with below but it has not given desired output:

INSERT INTO Customers (Service) 
VALUES ('Serv1'), ('Serv2'), ('Serv3')

Answer 1

You need some sort of JOIN , in this case a CROSS JOIN :

SELECT c.Customer, c.Id, v.s
FROM Customers c CROSS JOIN
     (VALUES ('Serv1'), ('Serv2'), ('Serv3')) v(s);

However, it doesn't make sense to insert this into the original table. That table only has two columns, but you seem to want a third one.

Answer 2

you have only two column so create third one.

go to table>>design>>and create the third row called Services

now do this:

UPDATE Customers
SET service='serv1'
WHERE Customer='Freddy '

Remember: The WHERE clause specifies which record or records that should be updated. If you omit the WHERE clause, all records will be updated!