In a real-world environment, changing granularity requirements might dictate changes in primary key selection, and those changes might ultimately require the use of surrogate keys.
Explanation:
A surrogate key is a unique identity as an object or entity. It is used as an object in the database and as an entity in the modern world. Surrogate key is not a natural key hence it cannot be derived from application data.
Advantages of using surrogate key:
- They are unique
- They have uniform rules
- It allows unlimited values
- It stands the test of time
Answer:
are u updating it? or u r rooting it?
Answer:
C. Because materials developed for use in space are often useful to ordinary citizens.
Explanation:
A, is not correct due to the "only" word. Humans can explore space too.
B, not that either because you will need lots of technology to space travel, not less.
C, because materials that can be produced through scientists' ideas can help contribute to society and improve technology.
D, is not correct because there is no need for new materials for new technology.
Economic sanctions programs are generally administered and enforced by the Office of Foreign Assets Control against nations and specialized categories of people, such as terrorists and drug traffickers.
To achieve aims in foreign policy and national security, sanctions can be either sweeping or selective, using the asset freezing and trade restrictions. Sanctions management has a long history at the Treasury Department. Gallatin, Secretary of the Treasury, oversaw the sanctions against Great Britain for harassing American seamen beginning before the War of 1812. Congress passed a statute during the Civil War that forbade trade with the Confederacy, demanded the loss of products used in such trade, and established a licensing system governed by Treasury-managed rules and regulations.
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