"mysql fill in missing dates" Code Answer's
You're definitely familiar with the best coding language SQL that developers use to develop their projects and they get all their queries like "mysql fill in missing dates" answered properly. Developers are finding an appropriate answer about mysql fill in missing dates related to the SQL coding language. By visiting this online portal developers get answers concerning SQL codes question like mysql fill in missing dates. Enter your desired code related query in the search bar and get every piece of information about SQL code related question on mysql fill in missing dates.
mysql fill in missing dates
MySQL doesn't have recursive functionality, so you're left with using the NUMBERS table trick -
Create a table that only holds incrementing numbers - easy to do using an auto_increment:
DROP TABLE IF EXISTS `example`.`numbers`;
CREATE TABLE `example`.`numbers` (
`id` int(10) unsigned NOT NULL auto_increment,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Populate the table using:
INSERT INTO `example`.`numbers`
( `id` )
VALUES
( NULL )
...for as many values as you need.
Use DATE_ADD to construct a list of dates, increasing the days based on the NUMBERS.id value. Replace "2010-06-06" and "2010-06-14" with your respective start and end dates (but use the same format, YYYY-MM-DD) -
SELECT `x`.*
FROM (SELECT DATE_ADD('2010-06-06', INTERVAL `n`.`id` - 1 DAY)
FROM `numbers` `n`
WHERE DATE_ADD('2010-06-06', INTERVAL `n`.`id` -1 DAY) <= '2010-06-14' ) x
LEFT JOIN onto your table of data based on the time portion:
SELECT `x`.`ts` AS `timestamp`,
COALESCE(`y`.`score`, 0) AS `cnt`
FROM (SELECT DATE_FORMAT(DATE_ADD('2010-06-06', INTERVAL `n`.`id` - 1 DAY), '%m/%d/%Y') AS `ts`
FROM `numbers` `n`
WHERE DATE_ADD('2010-06-06', INTERVAL `n`.`id` - 1 DAY) <= '2010-06-14') x
LEFT JOIN TABLE `y` ON STR_TO_DATE(`y`.`date`, '%d.%m.%Y') = `x`.`ts`
If you want to maintain the date format, use the DATE_FORMAT function:
DATE_FORMAT(`x`.`ts`, '%d.%m.%Y') AS `timestamp`
All those coders who are working on the SQL based application and are stuck on mysql fill in missing dates can get a collection of related answers to their query. Programmers need to enter their query on mysql fill in missing dates related to SQL code and they'll get their ambiguities clear immediately. On our webpage, there are tutorials about mysql fill in missing dates for the programmers working on SQL code while coding their module. Coders are also allowed to rectify already present answers of mysql fill in missing dates while working on the SQL language code. Developers can add up suggestions if they deem fit any other answer relating to "mysql fill in missing dates". Visit this developer's friendly online web community, CodeProZone, and get your queries like mysql fill in missing dates resolved professionally and stay updated to the latest SQL updates.