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Consider a relation student has Student_id, Student_name, Student_age, Student_Income, Student_address. 

which of the following query is used to display all rows and columns of the relation student?
  • a)
    Select Student_id  from student;
  • b)
    Select Student_name from student;
  • c)
    Select * from student;
  • d)
    Select Student_age from student;
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Consider a relation student has Student_id, Student_name, Student_age,...
The correct answer is option C.
Concept:
The SELECT statement is used to retrieve data from one or more database tables. SELECT * FROM table_name displays data from all the attributes of that table.
Hence the SQL query  Select * from student; prints all the rows and columns of relation student;

Option A, Option B, and Option D print the only one attribute of the relation student which means it prints the only one column of the relation not all columns.
Hence the correct answer is Select * from student;
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Consider a relation student has Student_id, Student_name, Student_age, Student_Income, Student_address.which of the following query is used to display all rows and columns of the relation student?a)Select Student_id from student;b)Select Student_name from student;c)Select * from student;d)Select Student_age from student;Correct answer is option 'C'. Can you explain this answer?
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