Question

I’m trying to get all rows from a table that lie between two dates. As a test, I set my two variables so that everything between 2000 and 2020 would show, but I ran into an error:

Unknown column 'DATE_START_SELECTED' in 'where clause'

This is the code I used:

$DATE_START_SELECTED = new DateTime('2000-01-01 05:59:00');
$DATE_END_SELECTED = new DateTime('2020-03-15 09:30:00');


$query = 'SELECT * FROM events WHERE DATE_START_SELECTED <= start_datetime AND end_datetime < DATE_END_SELECTED';
$result = mysql_query($query) or die(mysql_error());

Any idea why? Thanks 🙂

Answer 1

You are using Object

$DATE_START_SELECTED = new DateTime('2000-01-01 05:59:00');
$DATE_END_SELECTED = new DateTime('2020-03-15 09:30:00');

The best bet is you have to convert it to string, like

$DATE_START_SELECTED = '2000-01-01 05:59:00';
$DATE_END_SELECTED = '2020-03-15 09:30:00';

Then, change the SQL to

SELECT * FROM events
WHERE 
start_datetime >= '$DATE_START_SELECTED'
  AND 
end_datetime < '$DATE_END_SELECTED'

DATE_START_SELECTED is string,
in SQL mode will refer to column name, table name or database name

while $DATE_START_SELECTED is PHP variables