A little insight into time and date reading in php operating sqlserver_PHP tutorial

Last Friday, I wanted to make a PHP connection to mysql database and sqlserver database at the same time.
I had been using mysql before and was not very familiar with sqlserver, so I was crossing the river by feeling the stones. Nothing else, at least mysql and sqlserver are relatives
when doing conditional queries. A problem occurred
First of all, the time queried is in this format
11 30 2009 10:20:20AM
I opened the sqlserver database to view the data in the table
But it was 2009-11-30 10:20:20.233
After checking, it seems that sqlserver has a format problem, but the output is 2009-11-01. I have no choice but to convert it myself after querying the data
Under mysql
For example, I want to find data in the time period from 2009-11-01 to 2009-11-30
select * from table where time > '2009-11-01' and time < '2009-11-30';
I drew a tiger, but I don't know where my where went and it didn't work.
I think my 2009-11-01 is really bad. Compared with 11 30 2009 10:20:20AM or 2009-11-30 10:20:20.233, at least it is not very comparable
So I converted my 2009-11-01 to 11 01 2009 00:00:00AM It is even worse to compare it with 2009-11-01 00:00:00.000
. An error occurred at ":". Isn’t this uncomfortable?
So I searched awkwardly for a whole day without any sudden realization. I can’t let this small problem affect my image. I woke up early today.
I found the time conversion function of sqlserver yesterday. There are many kinds of convert, but there is no format like 2009-11-01. I don’t know if it’s me or not.
There is no way but to neutralize it. First convert 2009-11-01 to 20091101 and then 11 30 2009 10:20:20AM or 2009-11-30 10:20:20.233 is converted into 20091130 and then compared.
Don’t mention it, there are really results
select * from table where convert(varchar(10), date_time,112) !< $begin_date and convert(varchar(10),date_time,112) !> $end_date
(!< and !> almost tripped me up too)