How to Retrieve Records that contain values in Given Range: SQL Programming

Criteria is similar to a formula, a string that may consist of field references, operators and constants. We can tagged it an expression in sql programming. Sometimes this criteria have to be in range of values to let the programmer can select records within a range.

The article describes about these range operator that can access records within a given range e.g. list of students between ages 18yr to 25yr, list of employee having salary 10k to 20k. The inputted value may be a number, text or even dates. Mostly these range operator allows you to define a predicate in the form of a scope, if a column value falls in the specified scope, it got selected.

The Range operator retrieves data based on a range. The syntax for using the range operator in the SELECT statement is:

SELECT column_list
FROM table_name
WHERE expression1 range_operator expression2 AND expression3

Where

• Column_list: list of fields to be shown in output.
• Table_name: from the records are to be retrieved.
• expression1, expression2, and expression3 are any valid combination of constants, variables, functions, or column-based expressions.
• Range_operator is any valid range operator.

Here’re the range operators used in Sql programming

BETWEEN: Is used to specify a test range. It gives records specifying the given condition via sql query.
The following SQL query retrieves records from the Employee table when the vacation hour is between 20 and 50:

SELECT BusinessEntityID, VacationHours FROM HumanResources.Employee WHERE VacationHours BETWEEN 20 AND 50

NOT BETWEEN: Is used to specify the test range to which he values in the search result do not belong.
The following SQL query retrieves records from the Employee table when the vacation hour is not between 40 and 50:

SELECT BusinessEntityID, VacationHours FROM HumanResources.Employee WHERE VacationHours Not BETWEEN 20 AND 50

Retrieve records matches condition