Define primary key with an example.
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A researcher found an organism and wrote down its key as following :
Correct option is B) Star fish
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Consider the following. a) Transpiration plays a key role in upward movement of water
A) both a & b are true
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With the help of lock and key theory explain the mechanism of enzyme action.
1. Proteinaceous Nature: All enzymes are basically made up of protein. 2. Three-Dimensional conformation: a. All enzymes have specific 3-dimensional conformation. b. They have one or more active sites to which substrate (reactant) combines. c....
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What do you understand by terms ‘primary key’ and ‘secondary key’ in a database?
A primary key is a field that identifies each record in a database table admitting that the primary key must contain its UNIQUE values. A secondary key shows the secondary value...
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Which one of the following is an example for a primary data
D) List of absentee students of a day in 9th class.
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Which one of the following is an example for a primary data
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What is the key difference between primary and secondary sewage treatment?
Primary treatment involves the removal of large sized floating and suspended solids by physical methods, while secondary treatment involves decomposition of organic matter by microbial action.
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A ________ is a reference to a field in another relation or table (a) Primary key (b) Candidate key (c) Foreign key (d) Super key
(c) Foreign key
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1. Choose the odd one from the following. Primary key, Unique, Distinct, Default, Check
1. Distinct 2. Distinct is used with select command while others are column constraints of create table command.
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Assertion: Hoffmann’s bromamide reaction is given by primary amines. Reason: Primary amines are more basic than secondary amines.
(iii) Assertion is correct statement but reason is wrong statement.
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