INSERT Oracle Statement
The Insert statement allows you to insert a single record or multiple records into a table.
The syntax for the Insert INTO statement is:
INSERT INTO table
(column-1, column-2, ... column-n)
VALUES
(value-1, value-2, ... value-n);
Example #1 - insert sql server
Let's take a look at a very simple example.
INSERT INTO supplier
(supplier_id, supplier_name)
VALUES
(24553, 'IBM');
This would result in one record being inserted into the supplier table. This new record would have a supplier_id of 24553 and a supplier_name of IBM.
Example #2 - More complex example
You can also perform more complicated inserts using sub-selects.
For example:
INSERT INTO supplier
(supplier_id, supplier_name)
SELECT account_no, name
FROM customers
WHERE city = 'Newark';
By placing a "select" in the insert statement, you can perform multiples inserts quickly.
With this type of insert, you may wish to check for the number of rows being inserted. You can determine the number of rows that will be inserted by running the following SQL statement before performing the insert.
SELECT count(*)
FROM customers
WHERE city = 'Newark';
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Frequently Asked Questions
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.
Learn more about the pl sql Oracle
Learn more about the Oracle sql server
Learn more about the stored procedure Oracle
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