MCQ IN COMPUTER SCIENCE & ENGINEERING

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COMPUTER SCIENCE AND ENGINEERING

SQL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
what is the word used to retrieve data from tables.
A
From
B
*
C
SELECT
D
None of the above
Explanation: 

Detailed explanation-1: -An SQL SELECT statement retrieves records from a database table according to clauses (for example, FROM and WHERE ) that specify criteria. The syntax is: SELECT column1, column2 FROM table1, table2 WHERE column2=’value’;

Detailed explanation-2: -Queries. Queries can perform many different functions in a database. Their most common function is to retrieve specific data from the tables.

Detailed explanation-3: -Primary Key Out of all the candidate keys that can be possible or created for the specific table, there should be only one key that can be used to retrieve unique tuples from the table. This candidate key is called the “Primary Key".

Detailed explanation-4: -The SELECT statement is used to select data from a database. The data returned is stored in a result table, called the result-set.

Detailed explanation-5: -DML is abbreviation of Data Manipulation Language. It is used to retrieve, store, modify, delete, insert and update data in database.

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