Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I’ve a column for inserting ID which is not declared as primary key but I’ve to prevent dublicate entry of any ID.
how to find if a ID has already been inserted in the oracle database or not?? If the ID is already present in db, the user can not re-enter the ID.
How can I do it??
Create a unique constraint on the column.