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MySQL select all rows from last month until (now() – 1 month), for comparative purposes

Posted by: admin November 1, 2017 Leave a comment

Questions:

I need some help writing a MySQL query to show me rows from last month, but not the whole month, only up and until the same day, hour and minute as it is now(), but 1 month before.

So for example, if today is 5/19 at 5:25pm I need to select rows from midnight 12:00am 4/1 to 5:25pm of 4/19 (from the same year too of course).

Thanks!

Answers:

You can get the first of the month, by calculating the last_day of the month before and add one day. It is awkward, but I think it is better than formatting a date as string and use that for calculation.

select 
  *
from
  yourtable t
where
  /* Greater or equal to the start of last month */
  t.date >= DATE_ADD(LAST_DAY(DATE_SUB(NOW(), INTERVAL 2 MONTH)), INTERVAL 1 DAY) and
  /* Smaller or equal than one month ago */
  t.date <= DATE_SUB(NOW(), INTERVAL 1 MONTH)

Questions:
Answers:

Getting one month ago is easy with a single MySQL function:

SELECT DATE_SUB(NOW(), INTERVAL 1 MONTH);

or

SELECT NOW() - INTERVAL 1 MONTH;

Off the top of my head, I can’t think of an elegant way to get the first day of last month in MySQL, but this will certainly work:

SELECT CONCAT(LEFT(NOW() - INTERVAL 1 MONTH,7),'-01');

Put them together and you get a query that solves your problem:

SELECT *
FROM your_table
WHERE t >= CONCAT(LEFT(NOW() - INTERVAL 1 MONTH,7),'-01')
AND t <= NOW() - INTERVAL 1 MONTH

Questions:
Answers:

Simple code please check

select * from table_name where created <= (NOW() - INTERVAL 1 MONTH)

Questions:
Answers:

This is an example of a MySQL date operation relevant to your question:

SELECT DATE_ADD( now( ) , INTERVAL -1 MONTH ) 

The above will return date time one month ago

So, you can use it, as follows:

SELECT * 
FROM your_table 
WHERE Your_Date_Column BETWEEN '2011-01-04' 
    AND DATE_ADD(NOW( ), INTERVAL -1 MONTH )

Questions:
Answers:
SELECT * 
FROM table 
WHERE date BETWEEN 
    ADDDATE(LAST_DAY(DATE_SUB(NOW(),INTERVAL 2 MONTH)), INTERVAL 1 DAY) 
    AND DATE_SUB(NOW(),INTERVAL 1 MONTH);

See the docs for info on DATE_SUB, ADDDATE, LAST_DAY and other useful datetime functions.

Questions:
Answers:

You could use a where clause like:

where DateColumn between 
    cast(date_format(date_sub(now(), interval 1 month),'%Y-%m-01') as date)
    and
    date_sub(now(), interval 1 month)

Questions:
Answers:

SELECT * FROM table WHERE myDtate BETWEEN now(), DATE_SUB(NOW(), INTERVAL 1 MONTH)

Questions:
Answers:

My solution was to avoid using NOW() when writing sql with your programming language, and substitute with a string. The problem with NOW() as you indicate is it includes current time. So to capture from the beginning of the query day (0 hour and minute) instead of:

r.date <= DATE_SUB(NOW(), INTERVAL 99 DAY)

I did (php):

$current_sql_date = date(‘Y-m-d 00:00:00’);

in the sql:

$sql_x = “… r.date <= DATE_SUB(‘$current_sql_date’, INTERVAL 99 DAY) …”

With that, you will be retrieving data from midnight of the given day