Get a list of dates between two dates

问题

Using standard mysql functions is there a way to write a query that will return a list of days between two dates.

eg given 2009-01-01 and 2009-01-13 it would return a one column table with the values:

Edit: It appears I have not been clear. I want to GENERATE this list. I have values stored in the database (by datetime) but want them to be aggregated on a left outer join to a list of dates as above (I am expecting null from the right side of some of this join for some days and will handle this).

回答1:

I would use this stored procedure to generate the intervals you need into the temp table named time_intervals, then JOIN and aggregate your data table with the temp time_intervals table.

The procedure can generate intervals of all the different types you see specified in it:

call make_intervals('2009-01-01 00:00:00','2009-01-10 00:00:00',1,'DAY')
.
select * from time_intervals  
.
interval_start      interval_end        
------------------- ------------------- 
2009-01-01 00:00:00 2009-01-01 23:59:59 
2009-01-02 00:00:00 2009-01-02 23:59:59 
2009-01-03 00:00:00 2009-01-03 23:59:59 
2009-01-04 00:00:00 2009-01-04 23:59:59 
2009-01-05 00:00:00 2009-01-05 23:59:59 
2009-01-06 00:00:00 2009-01-06 23:59:59 
2009-01-07 00:00:00 2009-01-07 23:59:59 
2009-01-08 00:00:00 2009-01-08 23:59:59 
2009-01-09 00:00:00 2009-01-09 23:59:59 
.
call make_intervals('2009-01-01 00:00:00','2009-01-01 02:00:00',10,'MINUTE')
. 
select * from time_intervals
.  
interval_start      interval_end        
------------------- ------------------- 
2009-01-01 00:00:00 2009-01-01 00:09:59 
2009-01-01 00:10:00 2009-01-01 00:19:59 
2009-01-01 00:20:00 2009-01-01 00:29:59 
2009-01-01 00:30:00 2009-01-01 00:39:59 
2009-01-01 00:40:00 2009-01-01 00:49:59 
2009-01-01 00:50:00 2009-01-01 00:59:59 
2009-01-01 01:00:00 2009-01-01 01:09:59 
2009-01-01 01:10:00 2009-01-01 01:19:59 
2009-01-01 01:20:00 2009-01-01 01:29:59 
2009-01-01 01:30:00 2009-01-01 01:39:59 
2009-01-01 01:40:00 2009-01-01 01:49:59 
2009-01-01 01:50:00 2009-01-01 01:59:59 
.
I specified an interval_start and interval_end so you can aggregate the 
data timestamps with a "between interval_start and interval_end" type of JOIN.
.
Code for the proc:
.
-- drop procedure make_intervals
.
CREATE PROCEDURE make_intervals(startdate timestamp, enddate timestamp, intval integer, unitval varchar(10))
BEGIN
-- *************************************************************************
-- Procedure: make_intervals()
--    Author: Ron Savage
--      Date: 02/03/2009
--
-- Description:
-- This procedure creates a temporary table named time_intervals with the
-- interval_start and interval_end fields specifed from the startdate and
-- enddate arguments, at intervals of intval (unitval) size.
-- *************************************************************************
   declare thisDate timestamp;
   declare nextDate timestamp;
   set thisDate = startdate;

   -- *************************************************************************
   -- Drop / create the temp table
   -- *************************************************************************
   drop temporary table if exists time_intervals;
   create temporary table if not exists time_intervals
      (
      interval_start timestamp,
      interval_end timestamp
      );

   -- *************************************************************************
   -- Loop through the startdate adding each intval interval until enddate
   -- *************************************************************************
   repeat
      select
         case unitval
            when 'MICROSECOND' then timestampadd(MICROSECOND, intval, thisDate)
            when 'SECOND'      then timestampadd(SECOND, intval, thisDate)
            when 'MINUTE'      then timestampadd(MINUTE, intval, thisDate)
            when 'HOUR'        then timestampadd(HOUR, intval, thisDate)
            when 'DAY'         then timestampadd(DAY, intval, thisDate)
            when 'WEEK'        then timestampadd(WEEK, intval, thisDate)
            when 'MONTH'       then timestampadd(MONTH, intval, thisDate)
            when 'QUARTER'     then timestampadd(QUARTER, intval, thisDate)
            when 'YEAR'        then timestampadd(YEAR, intval, thisDate)
         end into nextDate;

      insert into time_intervals select thisDate, timestampadd(MICROSECOND, -1, nextDate);
      set thisDate = nextDate;
   until thisDate >= enddate
   end repeat;

 END;

Similar example data scenario at the bottom of this post, where I built a similar function for SQL Server.

回答2:

For MSSQL you can use this. It is VERY quick.

You can wrap this up in a table valued function or stored proc and parse in the start and end dates as variables.

DECLARE @startDate DATETIME
DECLARE @endDate DATETIME

SET @startDate = '2011-01-01'
SET @endDate = '2011-01-31';

WITH dates(Date) AS 
(
    SELECT @startdate as Date
    UNION ALL
    SELECT DATEADD(d,1,[Date])
    FROM dates 
    WHERE DATE < @enddate
)

SELECT Date
FROM dates
OPTION (MAXRECURSION 0)
GO

回答3:

We had a similar problem with BIRT reports in that we wanted to report on those days that had no data. Since there were no entries for those dates, the easiest solution for us was to create a simple table that stored all dates and use that to get ranges or join to get zero values for that date.

We have a job that runs every month to ensure that the table is populated 5 years out into the future. The table is created thus:

create table all_dates (
    dt date primary key
);

No doubt there are magical tricky ways to do this with different DBMS' but we always opt for the simplest solution. The storage requirements for the table are minimal and it makes the queries so much simpler and portable. This sort of solution is almost always better from a performance point-of-view since it doesn't require per-row calculations on the data.

The other option (and we've used this before) is to ensure there's an entry in the table for every date. We swept the table periodically and added zero entries for dates and/or times that didn't exist. This may not be an option in your case, it depends on the data stored.

If you really think it's a hassle to keep the all_dates table populated, a stored procedure is the way to go which will return a dataset containing those dates. This will almost certainly be slower since you have to calculate the range every time it's called rather than just pulling pre-calculated data from a table.

But, to be honest, you could populate the table out for 1000 years without any serious data storage problems - 365,000 16-byte (for example) dates plus an index duplicating the date plus 20% overhead for safety, I'd roughly estimate at about 14M [365,000 * 16 * 2 * 1.2 = 14,016,000 bytes]), a minuscule table in the scheme of things.

回答4:

You can use MySQL's user variables like this:

SET @num = -1;
SELECT DATE_ADD( '2009-01-01', interval @num := @num+1 day) AS date_sequence, 
your_table.* FROM your_table
WHERE your_table.other_column IS NOT NULL
HAVING DATE_ADD('2009-01-01', interval @num day) <= '2009-01-13'

@num is -1 because you add to it the first time you use it. Also, you can't use "HAVING date_sequence" because that makes the user variable increment twice for each row.

回答5:

Borrowing an idea from this answer, you can set up a table with 0 through 9 and use that to generate your list of dates.

CREATE TABLE num (i int);
INSERT INTO num (i) VALUES (0), (1), (2), (3), (4), (5), (6), (7), (8), (9);

select adddate('2009-01-01', numlist.id) as `date` from
(SELECT n1.i + n10.i*10 + n100.i*100 AS id
   FROM num n1 cross join num as n10 cross join num as n100) as numlist
where adddate('2009-01-01', numlist.id) <= '2009-01-13';

This will allow you to generate a list of up to 1000 dates. If you need to go larger, you can add another cross join to the inner query.

回答6:

For Access (or any SQL language)

Create one table that has 2 fields, we'll call this table tempRunDates:
--Fields fromDate and toDate
--Then insert only 1 record, that has the start date and the end date.
Create another table: Time_Day_Ref
--Import a list of dates (make list in excel is easy) into this table.
--The field name in my case is Greg_Dt, for Gregorian Date
--I made my list from jan 1 2009 through jan 1 2020.

Run the query:

SELECT Time_Day_Ref.GREG_DT
FROM tempRunDates, Time_Day_Ref
WHERE Time_Day_Ref.greg_dt>=tempRunDates.fromDate And greg_dt<=tempRunDates.toDate;

Easy!

回答7:

Typically one would use an auxiliary numbers table you usually keep around for just this purpose with some variation on this:

SELECT *
FROM (
    SELECT DATEADD(d, number - 1, '2009-01-01') AS dt
    FROM Numbers
    WHERE number BETWEEN 1 AND DATEDIFF(d, '2009-01-01', '2009-01-13') + 1
) AS DateRange
LEFT JOIN YourStuff
    ON DateRange.dt = YourStuff.DateColumn

I've seen variations with table-valued functions, etc.

You can also keep a permanent list of dates. We have that in our data warehouse as well as a list of times of day.

回答8:

Well how to find dates between two given date in SQL server is explain on http://ektaraval.blogspot.com/2010/09/writing-recursive-query-to-find-out-all.html

回答9:

CREATE FUNCTION [dbo].[_DATES]
(
    @startDate DATETIME,
    @endDate DATETIME
)
RETURNS 
@DATES TABLE(
    DATE1 DATETIME
)
AS
BEGIN
    WHILE @startDate <= @endDate
    BEGIN 
        INSERT INTO @DATES (DATE1)
            SELECT @startDate   
    SELECT @startDate = DATEADD(d,1,@startDate) 
    END
RETURN
END

回答10:

We used this in our HRMS System you will find it useful

SELECT CAST(DAYNAME(daydate) as CHAR) as dayname,daydate
    FROM
    (select CAST((date_add('20110101', interval H.i*100 + T.i*10 + U.i day) )as DATE) as daydate
      from erp_integers as H
    cross
      join erp_integers as T
    cross
      join erp_integers as U
     where date_add('20110101', interval H.i*100 + T.i*10 + U.i day ) <= '20110228'
    order
        by daydate ASC
        )Days

回答11:

This solution is working with MySQL 5.0
Create a table - mytable.
The schema does not material. What matters is the number of rows in it.
So, you can keep just one column of type INT with 10 rows, values - 1 to 10.

SQL:

set @tempDate=date('2011-07-01') - interval 1 day;
select
date(@tempDate := (date(@tempDate) + interval 1 day)) as theDate
from mytable x,mytable y
group by theDate
having theDate <= '2011-07-31';

Limitation: The maximum number of dates returned by above query will be
(rows in mytable)*(rows in mytable) = 10*10 = 100.

You can increase this range by changing form part in sql:
from mytable x,mytable y, mytable z
So, the range be 10*10*10 =1000 and so on.

回答12:

Elegant solution using new recursive (Common Table Expressions) functionality in MariaDB >= 10.3 and MySQL >= 8.0.

WITH RECURSIVE t as (
    select '2019-01-01' as dt
  UNION
    SELECT DATE_ADD(t.dt, INTERVAL 1 DAY) FROM t WHERE DATE_ADD(t.dt, INTERVAL 1 DAY) <= '2019-04-30'
)
select * FROM t;

The above returns a table of dates between '2019-01-01' and '2019-04-30'.

回答13:

Create a stored procedure which takes two parameters a_begin and a_end. Create a temporary table within it called t, declare a variable d, assign a_begin to d, and run a WHILE loop INSERTing d into t and calling ADDDATE function to increment the value d. Finally SELECT * FROM t.

回答14:

I would use something similar to this:

DECLARE @DATEFROM AS DATETIME
DECLARE @DATETO AS DATETIME
DECLARE @HOLDER TABLE(DATE DATETIME)

SET @DATEFROM = '2010-08-10'
SET @DATETO = '2010-09-11'

INSERT INTO
    @HOLDER
        (DATE)
VALUES
    (@DATEFROM)

WHILE @DATEFROM < @DATETO
BEGIN

    SELECT @DATEFROM = DATEADD(D, 1, @DATEFROM)
    INSERT 
    INTO
        @HOLDER
            (DATE)
    VALUES
        (@DATEFROM)
END

SELECT 
    DATE
FROM
    @HOLDER

Then the @HOLDER Variable table holds all the dates incremented by day between those two dates, ready to join at your hearts content.

回答15:

I've been fighting with this for quite a while. Since this is the first hit on Google when I searched for the solution, let me post where I've gotten so far.

SET @d := '2011-09-01';
SELECT @d AS d, cast( @d := DATE_ADD( @d , INTERVAL 1 DAY ) AS DATE ) AS new_d
  FROM [yourTable]
  WHERE @d <= '2012-05-01';

Replace [yourTable] with a table from your database. The trick is that the number of rows in the table you select must be >= the number of dates you want to be returned. I tried using the table placeholder DUAL, but it would only return one single row.

回答16:

select * from table_name where col_Date between '2011/02/25' AND DATEADD(s,-1,DATEADD(d,1,'2011/02/27'))

Here, first add a day to the current endDate, it will be 2011-02-28 00:00:00, then you subtract one second to make the end date 2011-02-27 23:59:59. By doing this, you can get all the dates between the given intervals.

output:
2011/02/25
2011/02/26
2011/02/27

回答17:

DELIMITER $$  
CREATE PROCEDURE popula_calendario_controle()
   BEGIN
      DECLARE a INT Default 0;
      DECLARE first_day_of_year DATE;
      set first_day_of_year = CONCAT(DATE_FORMAT(curdate(),'%Y'),'-01-01');
      one_by_one: LOOP
         IF dayofweek(adddate(first_day_of_year,a)) <> 1 THEN
            INSERT INTO calendario.controle VALUES(null,150,adddate(first_day_of_year,a),adddate(first_day_of_year,a),1);
         END IF;
         SET a=a+1;
         IF a=365 THEN
            LEAVE one_by_one;
         END IF;
      END LOOP one_by_one;
END $$

this procedure will insert all dates from the beginning of the year till now, just substitue the days of the "start" and "end", and you are ready to go!

回答18:

I needed a list with all months between 2 dates for statistics. The 2 dates are the start and enddate from a subscription. So the list shows all months and the amount of subscriptions per month.

MYSQL

CREATE PROCEDURE `get_amount_subscription_per_month`()
BEGIN
   -- Select the ultimate start and enddate from subscribers
   select @startdate := min(DATE_FORMAT(a.startdate, "%Y-%m-01")), 
          @enddate := max(DATE_FORMAT(a.enddate, "%Y-%m-01")) + interval 1 MONTH
   from subscription a;

   -- Tmp table with all months (dates), you can always format them with DATE_FORMAT) 
   DROP TABLE IF EXISTS tmp_months;
   create temporary table tmp_months (
      year_month date,
      PRIMARY KEY (year_month)
   );


   set @tempDate=@startdate;  #- interval 1 MONTH;

   -- Insert every month in tmp table
   WHILE @tempDate <= @enddate DO
     insert into tmp_months (year_month) values (@tempDate);
     set @tempDate = (date(@tempDate) + interval 1 MONTH);
   END WHILE;

   -- All months
   select year_month from tmp_months;

   -- If you want the amount of subscription per month else leave it out
   select mnd.year_month, sum(subscription.amount) as subscription_amount
   from tmp_months mnd
   LEFT JOIN subscription ON mnd.year_month >= DATE_FORMAT(subscription.startdate, "%Y-%m-01") and mnd.year_month <= DATE_FORMAT(subscription.enddate, "%Y-%m-01")
   GROUP BY mnd.year_month;

 END

回答19:

I am using Server version: 5.7.11-log MySQL Community Server (GPL)

Now we will solve this in a simple way.

I have created a table named "datetable"

mysql> describe datetable;
+---------+---------+------+-----+---------+-------+
| Field   | Type    | Null | Key | Default | Extra |
+---------+---------+------+-----+---------+-------+
| colid   | int(11) | NO   | PRI | NULL    |       |
| coldate | date    | YES  |     | NULL    |       |
+---------+---------+------+-----+---------+-------+
2 rows in set (0.00 sec)

now, wee will see the inserted records within.

mysql> select * from datetable;
+-------+------------+
| colid | coldate    |
+-------+------------+
|   101 | 2015-01-01 |
|   102 | 2015-05-01 |
|   103 | 2016-01-01 |
+-------+------------+
3 rows in set (0.00 sec)

and here our query to fetch records within two dates rather than those dates.

mysql> select * from datetable where coldate > '2015-01-01' and coldate < '2016-01-01';
+-------+------------+
| colid | coldate    |
+-------+------------+
|   102 | 2015-05-01 |
+-------+------------+
1 row in set (0.00 sec)

hope this would help many ones.

来源：https://stackoverflow.com/questions/510012/get-a-list-of-dates-between-two-dates

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