Bulk apply alias to table columns in MYSQL - mysql

Question

I'm working with a 3rd party MYSQL database over which I have no control except I can read from it. It contains 51 tables with identical column structure but slightly different names. They hold daily summaries for a different data source. Example Table:
CREATE TABLE `archive_day_?????` (
`dateTime` int(11) NOT NULL,
`min` double DEFAULT NULL,
`mintime` int(11) DEFAULT NULL,
`max` double DEFAULT NULL,
`maxtime` int(11) DEFAULT NULL,
`sum` double DEFAULT NULL,
`count` int(11) DEFAULT NULL,
`wsum` double DEFAULT NULL,
`sumtime` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
where ????? changes to indicate the type of data held.
The dateTime field is mirrored across all tables being midnight of every day since the system has been running.
I want to produce a single data set across all tables using an inner join on the dateTime. But to avoid writing
SELECT ad1.maxtime as ad1_maxtime, ad2.maxtime as ad2_maxtime...
51 times for 9 fields is there a way I can bulk create aliases e.g
ad1.* as ad_*, ad2.* as ad_* and so on.
I have looked at Create Aliases In Bulk? but this doesn't seem to work for MySQL. Ultimatly the data is being used by a Django ORM.
EDIT: Unfortunately Union doesn't uniquely identify the fields or group them together e.g.
SELECT * FROM `archive_day_ET` UNION ALL SELECT * FROM `archive_day_inTemp`
results in:

Answer 1

To generate a string with all the field names from those tables, you could query information_schema.columns
For example:
SELECT
GROUP_CONCAT(CONCAT(TABLE_NAME,'.`',column_name,'` AS `',column_name,'_',replace(TABLE_NAME,'archive_day_',''),'`') SEPARATOR ',\r\n')
FROM information_schema.columns
WHERE TABLE_NAME like 'archive_day_%'
A test on db<>fiddle here
And to generate the JOIN's then you could use information_schema.tables
For example:
SELECT CONCAT('FROM (\r\n ',GROUP_CONCAT(CONCAT('SELECT `dateTime` FROM ',TABLE_NAME) SEPARATOR '\r\n UNION\r\n '),'\r\n) AS dt \r\nLEFT JOIN ',
GROUP_CONCAT(CONCAT(TABLE_NAME,' ON ',
TABLE_NAME,'.`dateTime` = dt.`dateTime`') SEPARATOR '\r\nLEFT JOIN ')) as SqlJoins
FROM information_schema.tables
WHERE TABLE_NAME like 'archive_day_%'
A test on db<>fiddle here
For the 2 example tables they would generate
archive_day_ET.`dateTime` AS `dateTime_ET`,
archive_day_ET.`min` AS `min_ET`,
archive_day_ET.`mintime` AS `mintime_ET`,
archive_day_ET.`max` AS `max_ET`,
archive_day_ET.`maxtime` AS `maxtime_ET`,
archive_day_ET.`sum` AS `sum_ET`,
archive_day_ET.`count` AS `count_ET`,
archive_day_ET.`wsum` AS `wsum_ET`,
archive_day_ET.`sumtime` AS `sumtime_ET`,
archive_day_inTemp.`dateTime` AS `dateTime_inTemp`,
archive_day_inTemp.`min` AS `min_inTemp`,
archive_day_inTemp.`mintime` AS `mintime_inTemp`,
archive_day_inTemp.`max` AS `max_inTemp`,
archive_day_inTemp.`maxtime` AS `maxtime_inTemp`,
archive_day_inTemp.`sum` AS `sum_inTemp`,
archive_day_inTemp.`count` AS `count_inTemp`,
archive_day_inTemp.`wsum` AS `wsum_inTemp`,
archive_day_inTemp.`sumtime` AS `sumtime_inTemp`
And
FROM (
SELECT `dateTime` FROM archive_day_ET
UNION
SELECT `dateTime` FROM archive_day_inTemp
) AS dt
LEFT JOIN archive_day_ET ON archive_day_ET.`dateTime` = dt.`dateTime`
LEFT JOIN archive_day_inTemp ON archive_day_inTemp.`dateTime` = dt.`dateTime`