I would like to retrieve the top 1 value of result set of query which is connected using Union
SELECT TOP 1 * FROM
(
SELECT paused_time as end_time
FROM production_time
WHERE created_time = curdate()
UNION
SELECT resumed_time as end_time
FROM pause_timer
WHERE created_time = curdate()
UNION
SELECT end_time as end_time
FROM timer_idle
WHERE created_time = curdate()
) as end_time
ORDER BY end_time DESC
But could not get the expected result.
There is no TOP keyword in MySQL as far as I am aware. What you require is Limit:
SELECT * FROM
(
SELECT paused_time as end_time FROM production_time WHERE created_time = curdate()
UNION
SELECT resumed_time as end_time FROM pause_timer WHERE created_time = curdate()
UNION
SELECT end_time as end_time FROM timer_idle WHERE created_time = curdate()
) as end_time
ORDER BY end_time DESC
LIMIT 1
Related
im trying to take 3 sql queries and insert them into 1 table without getting the null value's and using a group by number as to not get duplicate numbers in the same column.
I have the issue where running query 1 leaves me with a bunch of null data values
and running query 2 doesnt group the numbers resulting in thousands of rows numbers only go up to 100
QUERY 1
insert into table ( number)
select number as 1day from table where date = CURDATE() - interval 1day group by number
insert into table ( number)
select number as 2day from table where date = CURDATE() - interval 1day group by number
insert into table ( number)
select number as 7day from table where date = CURDATE() - interval 1day group by number
so i try to run
QUERY 2
insert into table (number,number,number)
select
*
from
(select number as 1day from test.test where date = curdate() - interval 1 day group by
number) as 1day,
(select number as 2day from test.test where date > curdate() - interval 2 day group by
number) as 2day,
(select number as 7day from test.test where date > curdate() - interval 7 day group
by number) as 7day;
try the below:
insert into table (number,number,number)
select
table.1day,table.2day,table.7day
from
((select number from test.test where date = curdate() - interval 1 day group by
number) as 1day,
(select numberfrom test.test where date > curdate() - interval 2 day group by
number) as 2day,
(select number from test.test where date > curdate() - interval 7 day group
by number) as 7day) as table
select (case one.number when two.number then null else one.number end) as '1day',(case two.number <= third.number when true then (case one.number = two.number when true then null else two.number end) else (case one.number = two.number when false then null else two.number end) end) as '2day',(case (third.number < one.number and third.number = two.number) when true then null else third.number end) as '7day'
from (
(select x.number
from (
(select number,'1day' as 'type' from testtable where date = curdate() - interval 1 day group by number)
union all
(select number,'2day' as 'type' from testtable where date > curdate() - interval 2 day group by number)
union all
(select number,'7day' as 'type' from testtable where date > curdate() - interval 7 day group by number)) as x
where x.type='2day' order by x.number) as two,
(select x.number
from (
(select number,'1day' as 'type' from testtable where date = curdate() - interval 1 day group by number)
union all
(select number,'2day' as 'type' from testtable where date > curdate() - interval 2 day group by number)
union all
(select number,'7day' as 'type' from testtable where date > curdate() - interval 7 day group by number)) as x
where x.type='1day' order by x.number) as one,
(select x.number
from (
(select number,'1day' as 'type' from testtable where date = curdate() - interval 1 day group by number)
union all
(select number,'2day' as 'type' from testtable where date > curdate() - interval 2 day group by number)
union all
(select number,'7day' as 'type' from testtable where date > curdate() - interval 7 day group by number)) as x
where x.type='7day' order by x.number) as third
)
where ((one.number = two.number) or (one.number is null or two.number is null)) or
((third.number = two.number) or (two.number is null or third.number is null))
I have a complex mysql query language, including several sub queries and my final result is as below. There is something that I am dealing with it and I can't solve it and this is a way result is being presented. I am wondering to know how can i change the structure of the result in a way that the result is being presented only in one row and I don't want to see NULL fields. I mean something like below
This is mysql query
select count(*) as userRetentionSameDay, null as 'userRetentionDiffDay' from (SELECT date(`timestamp`), `user_xmpp_login`
FROM table1
WHERE DATE(`timestamp` ) = CURDATE() - INTERVAL 1 DAY) as res1
right join (select date(ts), user
from table2
WHERE DATE(ts ) = CURDATE() - INTERVAL 1 DAY
and product_id REGEXP ("^(europe+$" )) as lej1
on lej1.user = res1.`user_xmpp_login`
where res1.`user_xmpp_login` IS not NULL
union all
select null as 'userRetentionSameDay', count(*) as userRetentionDiffDay from (SELECT date(`timestamp`), `user_xmpp_login`
FROM table1
WHERE DATE(`timestamp` ) = CURDATE() - INTERVAL 1 DAY) as res1
right join (select date(ts), user
from table2
WHERE DATE(ts ) = CURDATE() - INTERVAL 1 DAY
and product_id REGEXP ("^(europe+$" )) as lej2
on lej2.user = res1.`user_xmpp_login`
where res1.`user_xmpp_login` IS NULL;
What are the recommended solutions to doing that?
try this.
SELECT A.userRetentionSameDay,B.userRetentionDiffDay FROM (
SELECT COUNT() AS userRetentionSameDay FROM
(
SELECT DATE(timestamp), user_xmpp_login
FROM table1
WHERE DATE(timestamp ) = CURDATE() - INTERVAL 1 DAY) AS res1
RIGHT JOIN (SELECT DATE(ts), USER
FROM table2
WHERE DATE(ts ) = CURDATE() - INTERVAL 1 DAY
AND product_id REGEXP ("^(europe+$" )) AS lej1
ON lej1.user = res1.user_xmpp_login
WHERE res1.user_xmpp_login IS NOT NULL
) A,
(
SELECT COUNT() AS userRetentionDiffDay FROM (
SELECT DATE(timestamp), user_xmpp_login
FROM table1
WHERE DATE(timestamp ) = CURDATE() - INTERVAL 1 DAY
) AS res1
RIGHT JOIN (SELECT DATE(ts), USER
FROM table2
WHERE DATE(ts ) = CURDATE() - INTERVAL 1 DAY
AND product_id REGEXP ("^(europe+$" )
) AS lej2
ON lej2.user = res1.user_xmpp_login
WHERE res1.user_xmpp_login IS NULL
) B;
TABLE
Table:
Id Date
1 01-10-15
2 01-01-16
3 01-03-16
4 01-06-16
5 01-08-16
Given two dates startdate 01-02-16 and enddate 01-05-16. I need to get the data from the table such that it returns all data between the closest past date from startdate and closest future date from enddate including the two dates. So the result will look like this.
Result:
Id Date
2 01-01-16
3 01-03-16
4 01-06-16
What I am doing
What I am doing now is fetching the whole data and removing from the array results less than closest fromdate and greater than closest enddate
What I want
What I want is to do this in query itself so that I don't have to fetch the whole data from table each time.
If you column's type is date, use union can do it:
(select * from yourtable where `date` <= '2016-01-02' order by `date` desc limit 1)
-- This query will get record which is closest past date from startdate
union
(select * from yourtable where `date` => '2016-01-05' order by `date` asc limit 1)
-- This query will get record which is closest future date from enddate
union
(select * from yourtable where `date` between '2016-01-02' and '2016-01-05')
Demo Here
Imaging your date is in YYYY-mm-dd
## get rows within the dates
SELECT * FROM tab WHERE ymd BETWEEN :start_date AND :end_date
## get one row closest to start date
UNION
SELECT * FROM tab WHERE ymd < :start_date ORDER BY ymd DESC LIMIT 1
## get one row closest to end date
UNION
SELECT * FROM tab WHERE ymd > :end_date ORDER BY ymd LIMIT 1
Try this
Select *
From
dTable
Where
[Date]
Between
(Select
Max(t1.Date)
From
dTable t1
Where
t1.date <startdate) And
(Select
Min(t2.Date)
From
dTable t2
Where
t2.date >enddate)
If Date is String, STR_TO_DATE and DATEDIFF can be used here.
SELECT id, Date
FROM tab
where
STR_TO_DATE(Date, '%d-%m-%y') BETWEEN('2016-02-01')AND('2016-05-01')
or
id = (SELECT id FROM tab
where STR_TO_DATE(Date, '%d-%m-%y') > '2016-05-01'
ORDER BY DATEDIFF(STR_TO_DATE(Date, '%d-%m-%y'), '2016-05-01') Limit 1)
or
id = (SELECT id FROM tab
where STR_TO_DATE(Date, '%d-%m-%y') < '2016-02-01'
ORDER BY DATEDIFF('2016-02-01', STR_TO_DATE(Date, '%d-%m-%y')) Limit 1)
I'm using MySQL 5.0, and I need to fine tune this query. Can anyone please tell me what tuning I can do in this?
SELECT DISTINCT(alert_master_id) FROM alert_appln_header
WHERE created_date < DATE_SUB(CURDATE(), INTERVAL (SELECT parameters FROM schedule_config WHERE schedule_name = "Purging_Config") DAY)
AND alert_master_id NOT IN (
SELECT DISTINCT(alert_master_id) FROM alert_details
WHERE end_date IS NULL AND created_date < DATE_SUB(CURDATE(), INTERVAL (SELECT parameters FROM schedule_config WHERE schedule_name = "Purging_Config") DAY)
UNION
SELECT DISTINCT(alert_master_id) FROM alert_sara_header
WHERE sara_master_id IN
(SELECT alert_sara_master_id FROM alert_sara_lines
WHERE end_date IS NULL) AND created_date < DATE_SUB(CURDATE(), INTERVAL (SELECT parameters FROM schedule_config WHERE schedule_name = "Purging_Config") DAY)
) LIMIT 5000;
The first thing that I'd do is rewrite the subqueries as joins:
SELECT h.alert_master_id
FROM alert_appln_header h
JOIN schedule_config c
ON c.schedule_name = 'Purging_Config'
LEFT JOIN alert_details d
ON d.alert_master_id = h.alert_master_id
AND d.end_date IS NULL
AND d.created_date < CURRENT_DATE - INTERVAL c.parameters DAY
LEFT JOIN (
alert_sara_header s
JOIN alert_sara_lines l
ON l.alert_sara_master_id = s.sara_master_id
)
ON s.alert_master_id = h.alert_master_id
AND s.end_date IS NULL
AND s.created_date < CURRENT_DATE - INTERVAL c.parameters DAY
WHERE h.created_date < CURRENT_DATE - INTERVAL c.parameters DAY
AND d.alert_master_id IS NULL
AND s.alert_master_id IS NULL
GROUP BY h.alert_master_id
LIMIT 5000
If it's still slow after that, re-examine your indexing strategy. I'd suggest indexes over:
alert_appln_header(alert_master_id,created_date)
schedule_config(schedule_name)
alert_details(alert_master_id,end_date,created_date)
alert_sara_header(sara_master_id,alert_master_id,end_date,created_date)
alert_sara_lines(alert_sara_master_id)
OK, this may be just a shot in the dark, but I think you don't need as many DISTINCT here.
SELECT DISTINCT(alert_master_id) FROM alert_appln_header
WHERE created_date < DATE_SUB(CURDATE(), INTERVAL (SELECT parameters FROM schedule_config WHERE schedule_name = "Purging_Config") DAY)
AND alert_master_id NOT IN (
-- removed distinct here --
SELECT alert_master_id FROM alert_details
WHERE end_date IS NULL AND created_date < DATE_SUB(CURDATE(), INTERVAL (SELECT parameters FROM schedule_config WHERE schedule_name = "Purging_Config") DAY)
UNION
-- removed distinct here --
SELECT alert_master_id FROM alert_sara_header
WHERE sara_master_id IN
(SELECT alert_sara_master_id FROM alert_sara_lines
WHERE end_date IS NULL)
AND created_date < DATE_SUB(CURDATE(), INTERVAL (SELECT parameters FROM schedule_config WHERE schedule_name = "Purging_Config") DAY)
) LIMIT 5000;
Since using the DISTINCT is very costly, try to avoid it. In the first WHERE clause you are checking for ids that are NOT within some result, so it shouldn't matter if in that result some ids appear more than once.
Hi I have below 5 mysql queries, i want to see output of all queries in by executing a single query.
please let me know how can i join all these queries.
1.
select sum(msu)
from wgr_raw
where dt
between '2013-11-01' and '2013-11-07';
2.
select *
from wgr_raw
where dt
between '2013-11-01' and '2013-11-07'
order by dt;
3.
select admin,sum(msu)
from wgr_raw
where dt
between '2013-11-01' and '2013-11-07'
group by admin;
4.
SELECT admin, sum(msu)
from wgr_raw
where dt
between '2013-11-01' and '2013-11-07'
group by admin
order by msu desc
limit 25;
Select ADMIN1,WEEK1,WEEK2,WEEK3,
(((WEEK3-WEEK2)/WEEK2)*100) as percentage_change,
(WEEK3-WEEK2) as MSU_Difference
from
((select admin as ADMIN1, sum(msu) as WEEK1
from wgr_raw
where dt >= date_sub(date('2013-11-01'),
INTERVAL 25 DAY) and dt < date_sub(date('2013-11-07'),
INTERVAL 18 DAY)
group by admin
order by WEEK1) as q1,
(select admin as ADMIN2, sum(msu) as WEEK2
from wgr_raw
where dt >= date_sub(date('2013-11-01'),
INTERVAL 18 DAY) and dt < date_sub(date('2013-11-07'),
INTERVAL 11 DAY)
group by admin
order by WEEK2) as q2,
(select admin as ADMIN3, sum(msu) as WEEK3
from wgr_raw where dt >= date_sub(date('2013-11-01'),
INTERVAL 11 DAY) and dt < date_sub(date('2013-11-07'),
INTERVAL 4 DAY)
group by admin
order by WEEK3) as q3)
where ADMIN1=ADMIN3 and ADMIN2=ADMIN3
group by admin1
order by WEEK1 desc
limit 25;
5.
select dt,sum(msu)
from wgr_raw
where dt >= date_sub(date('2013-11-01'),
INTERVAL 11 DAY)
group by dt
limit 7;
You can merge n number of select queries using UNION but there is one condition in UNION. Your all select fields should be same and order by will be common.
(
(SELECT a, b FROM tbl WHERE id >= 50 and id <= 100)
UNION
(SELECT a, b FROM tbl WHERE id >= 150 and id <= 200)
UNION
(SELECT a, b FROM tbl WHERE id >= 250 and id <= 300)
UNION
(SELECT a, b FROM tbl WHERE id >= 350 and id <= 400)
)
ORDER BY a