Oracle insert if not exists statement

Question

insert into OPT (email, campaign_id) values(\'mom@cox.net\',100)
where not exists( select * from OPT where (email =\"mom@cox.net\" and campaign_id =100)) ;
         


        

Answer 1

Another approach would be to leverage the INSERT ALL syntax from oracle,

INSERT ALL 
    INTO table1(email, campaign_id) VALUES (email, campaign_id)
WITH source_data AS
 (SELECT 'mom@cox.net' email,100 campaign_id
  FROM   dual
  UNION ALL
  SELECT 'dad@cox.com' email,200 campaign_id
  FROM   dual)      
SELECT email
      ,campaign_id
FROM   source_data src
WHERE  NOT EXISTS (SELECT 1
        FROM   table1 dest
        WHERE  src.email = dest.email
        AND    src.campaign_id = dest.campaign_id);

INSERT ALL also allow us to perform a conditional insert into multiple tables based on a sub query as source.

There are some really clean and nice examples are there to refer.

1. oracletutorial.com
2. oracle-base.com/