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Answer:
A primary key is a special relational database table column (or combination of columns) designated to uniquely identify each table record. A primary key is used as a unique identifier to quickly parse data within the table. A table cannot have more than one primary key.
Primary Key.
Candidate Key.
Alternate Key.
Super Key.
Composite Key.
Foreign Key.
Unique Key.
In the relational model of databases, a primary key is a specific choice of a minimal set of attributes that uniquely specify a tuple in a relation. Informally, a primary key is "which attributes identify a record," and in simple cases constitute a single attribute: a unique ID.
Explanation:
Try restarting it. If you can’t restart because the screen is frozen maybe just turn it off and back on. If you already tried restarting and it still didn’t fix the problem, just give it some time. The computer will reset itself eventually which should fix the problem.
Answer:
The correct answer to the given question is option D) Any or all of the above.
Explanation:
A posting error is a type of error which is related to ledger and would include the errors like -
Posting wrong amount on the right side of account
Posting right amount on the wrong side of right account
Posting an amount twice and posting omission
Posting wrong amount to wrong side of right account
Posting correct amount on wrong account on right side
So by knowing all the given above points, it is quite clear that the correct option is D.
