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PostgreSQL BETWEEN condition
PostgreSQL BETWEEN condition is used to obtain values in the range in SELECT, INSERT, UPDATE, or DELETE operator.
The syntax for BETWEEN condition in PostgreSQL
expression BETWEEN value1_id AND value2_id;
Parameters and arguments of the condition
- expression – Column or calculation.
- value1_id and value2_id – These values create an inclusive range with which the expression is compared.
Note:
- PostgreSQL condition BETWEEN will return records where expression is in the value1 and value2 ranges (inclusive).
Example BETWEEN condition with numbers
Consider some examples of PostgreSQL BETWEEN conditions using numeric values. In the following example, the BETWEEN condition is used to obtain values within a numeric range.
For example:
SELECT *
FROM empls
WHERE empl_id BETWEEN 500 AND 600;
In this example, all rows from the employee_id table will be returned, where employee_id is between 500 and 600 (inclusive). This is equivalent to the next SELECT operator :
SELECT *
FROM empls
WHERE empl_id >= 500
AND empl_id <= 600;
Example BETWEEN condition with dates
Now let’s see how you will use the PostgreSQL condition BETWEEN with dates.
In the following example, the BETWEEN condition is used to obtain values within a date range.
For example:
SELECT *
FROM empls
WHERE start_date BETWEEN '2019-04-01' AND '2019-04-30';
In this example, the BETWEEN condition will return all entries from the table where start_date is from April 1, 2019 to April 30, 2019 (inclusive). This would be equivalent to the next SELECT query:
SELECT *
FROM empls
WHERE start_date >= '01.04.2019'
AND start_date <= '30.04.2019';
Example of a condition using the NOT operator
PostgreSQL condition BETWEEN can also be combined with NOT operator. Here is an example of how you could combine a BETWEEN condition with the NOT operator.
For example:
SELECT *
FROM empls
WHERE empl_id NOT BETWEEN 700 AND 799;
This PostgreSQL example BETWEEN would return all rows from the employee table where employee_id is not between 700 and 799 inclusive. This would be equivalent to the next SELECT operator:
SELECT *
FROM empls
WHERE empl_id < 700
OR empl_id > 799;
PostgreSQL Tutorial for Beginners – PostgreSQL BETWEEN Condition
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