COMPUTER SCIENCE AND ENGINEERING
SQL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Preliminary Key
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Primary Key
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Product Key
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Private Key
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Detailed explanation-1: -In SQL databases, every table should have a primary key. The primary key (PK) is formed by one or several columns and is used to uniquely identify every record stored in the table.
Detailed explanation-2: -Primary Key Constraints A table typically has a column or combination of columns that contain values that uniquely identify each row in the table. This column, or columns, is called the primary key (PK) of the table and enforces the entity integrity of the table.
Detailed explanation-3: -The primary key in SQL is a single, or a group of fields or columns that can uniquely identify a row in a table. Putting it simply, it is a column that accepts unique values for each row.
Detailed explanation-4: -The Platform Key (PK) establishes a trust relationship between the platform owner and the firmware (UEFI BIOS) by controlling access to the KEK database. There is a single PK per platform, and the public portion of the PK is installed into the system, typically during production at the OEM.
Detailed explanation-5: -The main purpose of a primary key is to implement a relationship between two tables in a relational database; it’s not called a relational database for nothing! More specifically, the primary key is the “target” which a foreign key can reference.