Database Candidate Keys Sometimes become primary keys
A candidate key is a combination of features that can be uniquely used to identify any data without reference to a database. Each table can have one or more candidates. One of these candidate keys is selected as the table’s primary key. A table contains only one primary key, but it contains several candidate keys. If two or more columns of the candidate key are combined, it is called the combined key.
The candidate of key characteristics
All candidate keys have some common qualities. Over the lifetime of the candidate key, the attribute used for identification must be the same. Another value is that it cannot be null. Lastly, the candidate key must be unique.
For example, to uniquely identify each employee using the company’s social security number. As you can see, there are people with the same first names, last names, and positions, but not the same social security number two people do.
Candidate Keys of Examples
Some types of information can easily lend themselves to candidates:
- International Standard Book Numbers – ISBNs Most Identified Books and Related Media. The distribution of ISBNs is tightly regulated by industry contractors and ISBNs are rarely used by publishers.
- Bank Account Numbers – Most banks do not reuse account numbers.
- Serial numbers – Although serial numbers are not the only supplier in the industry, the serial number should always be unique.
- Driver license numbers – in general, these numbers are not duplicated. However, a person moving from state to state may have more than one DL number.
- National Providers ID-Doctors and other licensed medical providers each have at least one NPI, which provides them with health and human services to the US
However, some types of good candidates prove the problem:
- Phone numbers – Most carriers reuse phone numbers and individual subscribers can have multiple phone numbers at once.
- Universal Price Codes – UPCs are unique, but UPC block owners can reuse products.
- Medical record numbers – MRNs are usually issued at the hospital level, without any form of national guidance
- Social Security numbers – they’re theoretically unique, SSNs are reusable, and SSN fraud is common enough to make this a marker problem in large data sets. (In reviewing SSNs, this challenge is not a problem.)
How do I file a Tricker Pharmacy claim?
You are the right to file service of the date within one year.
Information required with your claim
- Medical payment for the fill-out patient request (DD Form 2642).
- You must send the form and the information below with your claim.
- If you have other health insurance, you should send a description of benefits (EOB).
Can you have Tricare and private insurance?
A third-party payer is a unit that pays for the medical claims of the insurer. Third-party payers examples These include government agencies, insurance companies, health care organizations (HMOs), and employers.
Which states are in the western region of Tricare?
Tricare supplements do not qualify as “other” health insurance . . ” That can be done by your employer or a private insurance program. By law, Tricare pays after all, except for health insurance: Medicaid. Tricare supplements.
