Introduction to SQL
Which of the following is the original purpose of SQL?

All of these
To specify the syntax and semantics of SQL manipulation language
To define the data structures
To specify the syntax and semantics of SQL data definition language

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Introduction to SQL
In an SQL SELECT statement querying a single table, according to the SQL-92 standard the asterisk (*) means that:

all records meeting the full criteria are to be returned.
None of these
all records with even partial criteria met are to be returned.
all columns of the table are to be returned.

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Introduction to SQL
Which of the following query is correct for using comparison operators in SQL?

None of these
SELECT name, course_name FROM student WHERE age>50 and <80;
SELECT name, course_name FROM student WHERE age>50 and age <80;
SELECT name, course_name FROM student WHERE age>50 and WHERE age<80;

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