MYSQL Table trial_list structure as follows...
id | product_id | expiry_date(date) | by_user | curr_datentime(timestamp)
we are able to extend any trial, and if we do that it simply another row with new expiry_date.
Now we would like to get rows got expired yesterday, we are currently using following sql query.....
Sample MYSQL DATASET
+----+-------------+-------------+-------------+----------+---------------------+
| id | product_id | comment | expiry_date | by_user | dnt |
+----+-------------+-------------+-------------+----------+---------------------+
| 2 | 50 | testing | 2011-02-18 | tester | 2011-02-17 23:36:12 |
+----+-------------+-------------+-------------+----------+---------------------+
| 3 | 50 | again | 2011-02-20 | tester | 2011-02-19 20:36:12 |
+----+-------------+-------------+-------------+----------+---------------------+
| 4 | 50 | extend | 2011-02-23 | tester | 2011-02-21 22:36:12 |
+----+-------------+-------------+-------------+----------+---------------------+
$sql = 'SELECT id, product_id, expiry_date, by_user, curr_datentime FROM trial_list WHERE expiry_date < CURDATE() ORDER BY expiry_date DESC';
We believe this is not correct as its getting all rows which date is older than yesterday not updated expiry_date, suppose we have given some user expiry date 1st feb 2011 and then we change again with 12th feb 2011, so it selects 1st feb 2011 entry. I think it makes sense.
What you have to do first is get the latest item per product_id. After that you can further filter it down to those which are expired. Something like:
SELECT a.* FROM
trial_list AS a
LEFT JOIN trial_list AS b ON a.product_id = b.product_id AND a.id < b.id
WHERE b.product_id IS NULL
AND a.expiry_date < curdate()
See http://dev.mysql.com/doc/refman/5.5/en/example-maximum-row.html
Try using NOW() instead of CURDATE(), you are comparing a Date to a Timestamp, NOW() will compare timestamps.
Related
Table example
id | name | value | date
--------------------------------------------
1 | abc | 20 | 2018-01-26
1 | abc | 24 | 2018-01-27
1 | abc | 25 | 2018-01-28
1 | abc | 30 | 2018-01-29
I know how to fetch data from 28th Jan or today. But I need some way to show values of two dates in two columns. Is it possible in one mysql query?
Like this
name | value_today | value_pre
---------------------------------------
abc | 30 | 25
You can achieve this using the case. This query returns the today's value and previous date value:
SELECT
id, name,
Sum(Case When date = CURDATE()
Then value Else 0 End) TodaySum,
Sum(Case When (date = CURDATE()-1)
Then value Else 0 End) PreviousSum
FROM tbl1
group by id, name
Here's a hypothetical query that would do it.
SELECT t1.value AS value_today,(SELECT t2.value FROM table AS t2 WHERE t2.date=2018-01-29 ) AS value_pre
FROM table AS t1 WHERE t1.date=2018-01-28
I am having a table having following information
I want to display information some what like that
Actually i am using php to display a google chart for which i need a query which can give me this output. The system should check the month and based on the month it should prepare the report, E.g if its the month of April it should display April for both A and B users as zero. i am using the following query but it
SELECT name
,month as month
,count(*) as no_of_vists
FROM abc where name = 'A'
group by month
order by date(month);
try as below :
select x.name
,x.month
,count (y.*)
FROM
(SELECT b.name
,a.month
FROM (select month from abc) a
JOIN (select name from abc) b
ON (1=1)
group by 1,2 ) x
LEFT JOIN abc y
ON (x.month = y.month and x.name = y.name)
group by 1,2
order by 1,2;
Output :
| name | month | count |
|------|----------|-------|
| a | February | 1 |
| a | January | 2 |
| a | March | 1 |
| b | February | 0 |
| b | January | 1 |
| b | March | 0 |
Here is the sqlfiddle : http://sqlfiddle.com/#!15/3feb0/24
How can I get the latest data of a specific day in MySQL?
Let's assume that I have a column of dates recorded on my database
dates | time | value
---------------------------------------------
2015-08-05 | 11:03:02 | 200
2015-08-05 | 23:04:22 | 2400
2015-08-07 | 8:00:22 | 500
2015-08-08 | 13:00:11 | 400
2015-08-08 | 13:23:11 | 200
2015-08-09 | 17:00:23 | 2200
2015-08-09 | 17:06:00 | 1290
2015-08-09 | 19:22:00 | 900
2015-08-13 | 01:01:22 | 1010
I want to get the latest data or transaction of a specific date, my desired result would be like this
dates | time | value
---------------------------------------------
2015-08-05 | 23:04:22 | 2400
2015-08-07 | 8:00:22 | 500
2015-08-08 | 13:23:11 | 200
2015-08-09 | 19:22:00 | 900
2015-08-13 | 01:01:22 | 1010
Only the latest data of a spefic or distinct date is chosen, what is the possible query with this?
You need to do this way to get that for each dates
select t1.dates,t1.time,t1.value from table as t1 inner join
(
select dates,max(time) as time from table group by dates
) as t2 on t1.dates=t2.dates and t1.time=t2.time
Use
SELECT * FROM TABLE_NAME GROUP BY dates ORDER BY time desc LIMIT 1;
Or
SELECT * FROM TABLE_NAME GROUP BY dates HAVING time <= '23:59:59' LIMIT 1;
Try this:
SELECT `dates`, MAX(`time`) AS `time`, MAX(`value`) AS `value`
FROM `tbl_name`
GROUP BY `dates`
ORDER BY `dates` ASC
Try this query:
SELECT * FROM `table` GROUP BY dates ORDER BY time DESC;
I can code in PHP but I'm not good with SQL at all. I need to run an update on a table in order to pass in a given user_id and set the "access_end" date for all products the user owns to one year from today's date.
Any help much appreciated
Database is MySQL
Table name is dap_users_products_jn
Relevant Fields in database are:
user_id | access_end_date | product_id
1 | 2012-10-26 | 34
1 | 2012-11-21 | 30
1 | 2012-12-22 | 3
2 | 2012-10-20 | 34
2 | 2012-07-18 | 30
2 | 2012-08-15 | 3
...etc
update dap_users_products_jn
set access_end_date = date_add(now(), interval 1 year)
where user_id = 1
I need to write a query to retrieve values from two columns using mysql table
My table has the following strucutre
| ID | user_id | datetime | message |
| 1 | 21 | 2012-05-10 04:13:01 | message1 |
| 2 | 07 | 2012-05-10 04:17:51 | message2 |
| 3 | 21 | 2012-05-11 04:21:51 | message3 |
| 4 | 21 | 2012-05-11 04:43:51 | message4 |
| 5 | 07 | 2012-05-11 04:21:51 | message5 |
| 5 | 21 | 2012-05-11 04:43:51 | message6 |
i wrote the below query
$query="SELECT MAX(datetime) FROM messages where user_id=21 and date=2012-05-11";
but i am not getting latest record from table iam getting null value
help us
$query="SELECT MAX(datetime) FROM messages where user_id=21 and date LIKE '2012-05-11%'";
You should use DATE(date) to get date of timestamp. MySQL function DATE() extracts only date without hours, minutes and seconds.
Here is your query:
SELECT MAX(datetime)
FROM messages
WHERE user_id = 21 AND DATE(date) = '2012-05-11'
Have you tried the following?
$query="SELECT MAX(datetime) FROM messages where user_id=21";
Update:
In your question, you didn't specify if you wanted to retrieve last record for a certain date. If you do, you'd need to use MySQL's date function.
Are you looking for the most recent record? You can get this with a subquery:
$query = "SELECT * FROM messages WHERE datetime = (SELECT MAX(datetime) FROM messages)";
Your query asks for ".....date=2012-05-11";" but your table does not have the field named date? did you mean datetime? if so, you may want to try ".....datetime like '2012-05-11%'";