Insert/Insert all command using select statement.

INSERT INTO suppliers
(supplier_id, supplier_name)
SELECT account_no, name
FROM customers
WHERE city = 'Newark';

or

Frequently Asked Questions

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Question: I am setting up a database with clients. I know that you use the "insert" statement to insert information in the database, but how do I make sure that I do not enter the same client information again?
Answer: You can make sure that you do not insert duplicate information by using the EXISTS condition.
For example, if you had a table named clients with a primary key of client_id, you could use the following statement:

INSERT INTO clients
(client_id, client_name, client_type)
SELECT supplier_id, supplier_name, 'advertising'
FROM suppliers
WHERE not exists (select * from clients
where clients.client_id = suppliers.supplier_id);

This statement inserts multiple records with a subselect.
If you wanted to insert a single record, you could use the following statement:

INSERT INTO clients
(client_id, client_name, client_type)
SELECT 10345, 'IBM', 'advertising'
FROM dual
WHERE not exists (select * from clients
where clients.client_id = 10345);

The use of the dual table allows you to enter your values in a select statement, even though the values are not currently stored in a table.
Learn more about the EXISTS condition.

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Question: How can I insert multiple rows of explicit data in one SQL command in Oracle?
Answer: The following is an example of how you might insert 3 rows into the suppliers table in Oracle.

INSERT ALL
   INTO suppliers (supplier_id, supplier_name) VALUES (1000, 'IBM')
   INTO suppliers (supplier_id, supplier_name) VALUES (2000, 'Microsoft')
   INTO suppliers (supplier_id, supplier_name) VALUES (3000, 'Google')
SELECT * FROM dual;