Explanation:
Both Primary Key and Candidate Key are the attributes that are used to access tuples from a table. These (Primary key and Candidate key) are also can be used to create a relationship between two tables.
- A Candidate Key can be any column or a combination of columns that can qualify as a unique key in the database. Each Candidate Key can qualify as a Primary Key.
- A Primary Key is a column or a combination of columns that uniquely identify a record. The primary key is a minimal super key, so there is one and only one primary key in any relationship.
<em> The main difference between them is that a primary key is unique but there can be many candidate keys. </em>
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Add Rome Backup group to a membership list of a group that already has access to perform backup operations on the local system. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
If a client initiates the SMTP communication using an EHLO (Extended Hello) command instead of the HELO command some additional SMTP commands are often available. They are often referred to as Extended SMTP (ESMTP) commands or SMTP service extensions. Every server can have its own set of extended SMTP commands.
Answer:
321Go
Explanation:
The identifiers in C, C++, C#, Java and other programming languages are a combination of letters, numbers and the underscore symbol. The laters versions of C and C++ allows you to use almost all Unicode characters. In Java, you can use also the dollar sign.
From that you have to be careful to follow these rules:
-Don't use keywords.
-Don't include white spaces.
-Don't use operators.
-Don't repeat identifiers.
-Don't start your identifier with a number.
-Don't use two consecutive underscores.
So app_234, happyTimesAhead, and cis22B are follo wing these rules but 321Go starts with a number.
Rapid prototyping as it allows the production of a functional program in a short time
