How to: using SQL IN and BETWEEN Conditional Operators

IN and BETWEEN Conditional Operators

SELECT col1, SUM(col2)
FROM "list-of-tables"
WHERE col3 IN 
       (list-of-values);

SELECT col1, SUM(col2)
FROM "list-of-tables"
WHERE col3 BETWEEN value1 
AND value2;

The IN conditional operator is really a set membership test operator.
That is, it is used to test whether or not a value (stated before the
keyword IN) is "in" the list of values provided after the keyword IN.

For example:

SELECT employeeid, lastname, salary
FROM employee_info
WHERE lastname IN ('Hernandez', 'Jones', 'Roberts', 'Ruiz');

This statement will select the employeeid, lastname, salary from
the employee_info table where the lastname is equal to either:
Hernandez, Jones, Roberts, or Ruiz. It will return the rows if
it is ANY of these values.
The IN conditional operator can be rewritten by using compound
conditions using the equals operator and combining it with OR -
with exact same output results:

SELECT employeeid, lastname, salary
FROM employee_info
WHERE lastname = 'Hernandez' OR lastname = 'Jones' OR lastname = 'Roberts'
OR lastname = 'Ruiz';

As you can see, the IN operator is much shorter and easier to read
when you are testing for more than two or three values.
You can also use NOT IN to exclude the rows in your list.
The BETWEEN conditional operator is used to test to see whether or
not a value (stated before the keyword BETWEEN) is "between" the
two values stated after the keyword BETWEEN.
For example:

SELECT employeeid, age, lastname, salary
FROM employee_info 
WHERE age BETWEEN 30 AND 40;

This statement will select the employeeid, age, lastname, and salary
from the employee_info table where the age is between 30 and 40
(including 30 and 40).
This statement can also be rewritten without the BETWEEN operator:

SELECT employeeid, age, lastname, salary
FROM employee_info
WHERE age >= 30 AND age <= 40;

You can also use NOT BETWEEN to exclude the values between your range.

NOTE: How to: using SQL IN and BETWEEN Conditional Operators

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