The inverse of a between select PSQL

Question

I want to select the inverse of a data range in a postgres database: the query i am trying to use is

SELECT * 
FROM projects 
WHERE lastactivity BETWEEN 2015-08-3 AND 2015-09-11

Answer 1

Use NOT operator in your BETWEEN condition like

SELECT * 
FROM projects 
WHERE lastactivity NOT BETWEEN 2015-08-3 AND 2015-09-11;