I have this table :
+----+-----------+-------+
| id | client_id | is_in |
+----+-----------+-------+
| 1 | 1 | 0 |
+----+-----------+-------+
| 2 | 2 | 0 |
+----+-----------+-------+
| 3 | 1 | 1 |
+----+-----------+-------+
| 4 | 2 | 1 |
+----+-----------+-------+
| 5 | 3 | 1 |
+----+-----------+-------+
| 6 | 3 | 1 |
+----+-----------+-------+
| 7 | 1 | 0 |
+----+-----------+-------+
| 8 | 4 | 0 |
+----+-----------+-------+
| 9 | 4 | 0 |
+----+-----------+-------+
And I need to get the number of clients that have 'is_in' equal to 1 at least one time and that have never had 'is_in' equal to 0 (in this case one the client_id 3).
To do so, I made two queries:
SELECT client_id FROM foo WHERE is_in = 1;
and
SELECT client_id FROM foo WHERE is_in = 0;
And I planned to to an INTERSECT between them so I can get the common entries between the two selects so I just need to do "number of clients with is_in = 1" - "count(of the result of the intersect)".
But INTERSECT can't be used with MYSQL, is there an alternative to INTERSECT that work in this case or a simpler way to get what I need (I'm feeling that I'm doing complicated for nothing).
Thank you.
SELECT id, client_id FROM foo WHERE is_in = 1 AND client_id NOT IN (SELECT client_id FROM foo WHERE is_in = 0)
Or, if you need only the client number:
SELECT DISTINCT client_id FROM foo WHERE is_in = 1 AND client_id NOT IN (SELECT client_id FROM foo WHERE is_in = 0)
what you could so sum them up and get the smallest value, grouped by client id and have the result exclude any of those that had a zero. Try this:
SELECT COUNT(client_id)
FROM foo
GROUP BY client_id
HAVING SUM(is_in) > 0 && MIN(is_in) > 0
Related
I have 2 tables, the first table or_f_table data. The second table or_table
or_f_table
f_id | f_o_id | f_u_id
1 | 19 | 1
2 | 5 | 2
3 | 19 | 2
or_table
o_id | o_name
4 | test1
5 | test2
19 | oops2
20 | oops3
SELECT o.o_name,
IF ((SELECT count(*) FROM or_f_table as f
WHERE f.f_u_id = 1 ),'Yes','No') as follow_status
FROM or_table as o
WHERE o.o_name LIKE '%oop%'
I want to do something like this result :-
o_name | follow_status
oops2 | Yes
oops3 | No
I am getting result
o_name | follow_status
oops2 | Yes
oops3 | Yes
Why doesn't it work? And how should I correct it
There will always be a value greater than 0 for your where condition. That is why it is not working.
Try this to get the specified results
SELECT o.o_name,
IF ((SELECT count(*) FROM or_f_table as f
WHERE f.f_o_id = o.o_id ),'Yes','No') as follow_status
FROM or_table as o
WHERE o.o_name LIKE '%oop%'
Currently, I'm using this nice query:
select
users.name,
sum(race_results.winnings) as total_winnings,
count(CASE WHEN race_results.place=1 THEN 1 ELSE 0 END) AS times_won_first_place
from users
inner join race_results
where race_results.userid = users.id and race_results.place = 1
group by users.id
order by total_winnings desc
to get this
************************************************
| name | total_winnings | times_won_first_place |
| Bob | 4000 | 4 |
| John | 1000 | 1 |
************************************************
the race_results table looks like this
*******************************************
| id | raceid | userid | place | winnings |
| 1 | 1 | 1 | 1 | 1000 |
| 2 | 1 | 2 | 5 | 50 |
| 3 | 1 | 3 | 6 | 50 |
| 4 | 2 | 1 | 1 | 1000 |
| 5 | 2 | 2 | 3 | 250 |
*******************************************
I would like to include four three more columns for something like this
***************************************************************************
| name | total_winnings | total_races | 1st_place | 2nd_place | 3rd_place |
| Bob | 4000 | 5 | 4 | 0 | 0 |
| John | 1000 | 5 | 1 | 1 | 1 |
***************************************************************************
If I were to do separate queries for the new columns, I'd use
select count(raceid) from race_results where userid = 1
select count(raceid) from race_results where userid = 1 and place = 1
select count(raceid) from race_results where userid = 1 and place = 2
select count(raceid) from race_results where userid = 1 and place = 3
to do separate queries would be easy but with the existing query I had to use CASE just to get the count of times a user won 1st place. (using
count(CASE WHEN race_results.place=2 THEN 1 ELSE 0 END)
returns the same results).
How would I nest these or join them into my existing query to get what I want?
You can do it this way:
select
users.name,
sum(race_results.winnings) as total_winnings,
count(*) AS total_races,
sum(race_results.place = 1) AS times_won_first_place ,
sum(race_results.place = 2) AS times_won_second_place,
sum(race_results.place = 3) AS times_won_third_place
from users
inner join race_results
where race_results.userid = users.id
group by users.id
order by total_winnings desc;
With ANSI standard SQL you could use case expressions inside the sum function but since MySQL (and some other databases) evaluate boolean expressions to 1 for true you can replace the case expression with the just the condition to evaluate and then just sum them.
So instead of CASE WHEN race_results.place=1 THEN 1 ELSE 0 END you can do sum(race_results.place=1) and save some space and typing :)
See this SQL Fiddle for an example.
This is my scenario
I have a permissions table with the following fields.
id | module | permission
1 | client | add
2 | client | edit
3 | client | delete
4 | someth | edit
5 | someth | delete
employee table
id | status | somestatus
1 | act | 1
2 | den | 1
3 | act | 0
4 | den | 1
5 | act | 0
6 | act | 1
Now what i would need to do is select the employee who have status="act" and somestatus=1 and give them all permissions where module="client"
so the table employee_permissions should have these rows
id | empid | permid | permvalue
1 | 1 | 1 | 1
2 | 1 | 2 | 1
3 | 1 | 3 | 1
1 | 6 | 1 | 1
2 | 6 | 2 | 1
3 | 6 | 3 | 1
This is the query I tried and I'm stuck here
INSERT INTO at2_permission_employee (employee_id,permission_id)
SELECT at2_employee.employee_id as employee_id
, (SELECT at2_permission.permission_id as permission_id
FROM at2_permission
where at2_permission.permission_module='client'
)
from at2_employee
where at2_employee.employee_status='Active'
and at2_employee.employees_served_admin = 1;
I get the error sub query returns multiple rows which makes sense to me. But I'm not sure how to modify the query to account for iterating over the rows returned by sub query
If I'm not wrong, like this:
INSERT INTO at2_permission_employee (employee_id, permission_id, permvalue)
SELECT
at2_employee.employee_id,
at2_permission.permission_id,
1
FROM at2_permission cross join at2_employee
WHERE
at2_employee.employee_status='Active'
and at2_employee.employees_served_admin = 1
and at2_permission.permission_module='client';
It's a bit unclear where the value for permvalue should come from so I hard coded it and used the permission.id for both id and permid, but this query should give you an idea on how to accomplish what you want:
insert employee_permissions (id, empid, permid, permvalue)
select p.id, e.id, p.id, 1
from employee e, permissions p
where p.module = 'client' and e.status = 'act' and e.somestatus = 1;
Its very hard for to set a proper title, because I dont know how I describe my problem.
I have a table like this:
dlID | dl_seID | dlEpisode | dlFlag
___________________________________
1 | 1 | 1 | 0
2 | 1 | 2 | 1
3 | 1 | 3 | 1
4 | 2 | 1 | 1
5 | 2 | 2 | 0
6 | 3 | 1 | 0
What i want is a select query where I get something like this:
dlID | dl_seID | dlEpisode | dlFlag | dlFlagCount
_________________________________________________
1 | 1 | 1 | 0 | 2
2 | 1 | 2 | 1 | 2
3 | 1 | 3 | 1 | 2
4 | 2 | 1 | 1 | 1
5 | 2 | 2 | 0 | 1
6 | 3 | 1 | 0 | 0
dlFlagCount shoud be a counter of dlFlag = 1 where dl_seID = dl_seID.
Second try:
I need a value where I see how many Flags have the value 1 with the same dl_seID.
Is that possible?
I hope you guys know what I want^^
Regards
Try this:
select
a.*,
ifnull(b.ctflags,0)
from
tablea a left join
( select dl_seID, count(dlFlag) ctflags
from tablea
where dlFlag=1
group by dl_seID ) b on (a.dl_seID = b.dl_seID)
The left join is just to get the registry with 0 flags
See the fiddle: http://sqlfiddle.com/#!2/ef9b0/5
EDIT:
As op requested some explanation, here it goes:
What you asked is to count the amount of flags by the dl_seID and to do that you need to do this you separeta your problems, first you get the count for the dl_seID by flags, this is this subquery:
select dl_seID, count(dlFlag) ctflags
from tablea
where dlFlag=1
group by dl_seID
This became a 'separe table' or a new group of data, whatever you wanna call it. Then you have to join this with your original data (from your table) like the query for answer.
The left join part is because maybe there are some data that wont complain with where dlFlag=1 therefore if you want to get then as 0 you have to bring all values from table that exists or not on our created subgroup. And this ifnull(b.ctflags,0) is for theese data data exists on your table but has no flags (for your problem). If you use just b.ctflags it will bring null.
SELECT x.*
, COALESCE(y.flagcount,0) flagcount
FROM my_table x
LEFT
JOIN
( SELECT seID
, COUNT(*) flagcount
FROM my_table
WHERE flag = 1
GROUP
BY seid
) y
ON y.seid = x.seid;
Hello there I have a following table
------------------------------------------
| id | language | parentid | no_daughter |
------------------------------------------
| 1 | 1 | 0 | 2 |
------------------------------------------
| 1 | 1 | 0 | 2 |
------------------------------------------
| 2 | 1 | 1 | 1 |
------------------------------------------
| 2 | 2 | 1 | 1 |
------------------------------------------
| 3 | 1 | 1 | 0 |
------------------------------------------
| 3 | 2 | 1 | 0 |
------------------------------------------
| 4 | 1 | 2 | 0 |
------------------------------------------
| 4 | 2 | 2 | 0 |
------------------------------------------
| 5 | 1 | 2 | 0 |
------------------------------------------
| 5 | 2 | 2 | 1 |
-----------------------------------------
| 5 | 1 | 4 | 1 |
------------------------------------------
| 5 | 2 | 4 | 1 |
------------------------------------------
Scenario
Every record has more than one rows in table with different language ids. parentid tells who is the parent of this record. no_daughter columns tells against each record that how many child one record has. Means in Ideal scenario If no_daughter has value 2 of id = 1 , it means 1 should be parentid of 2 records in same table. But If a record has more than one exitance with respect to language, it will be considered as one record.
My Problem
I need to find out those records where no_daughter value is not correct. It means if no_daughter is 2, there must be two records whoes parentid has that id. In above case record with id = 1 is valid. But record having id = 2 is not valid because the no_daughter = 1 but actual daughter of this record is 2. Same is the case with id=4
Can any body tell me how can I find these faulty records?
Updated after answers
Ken Clark has and shola has given answer which return same result for example shola query is
SELECT DISTINCT
id
FROM
tbl_info t
INNER JOIN
(SELECT
parentid,
COUNT(DISTINCT id) AS childs
FROM
tbl_info
GROUP BY parentid) AS parentchildrelation
ON t.id = parentchildrelation.parentid
AND t.no_daughters != parentchildrelation.childs
This query is returning those ids who have been used as parentid somewhere in table but having wrong no_daughter values. But not returning ids that has value in no_daugter columns but have not been used as parentid any where in table. For exampl id = 5 has no_daughter = 1 but it is not used as parentid in table. So it is also a faulty record. But above query is not capturing such records.
Any help will be much appreciated.
Try this:
SELECT DISTINCT
id
FROM
tbl_info t
Left JOIN
(SELECT
parentid,
COUNT(DISTINCT id) AS childs
FROM
tbl_info
GROUP BY parentid) AS parentchildrelation
ON t.id = parentchildrelation.parentid
Where t.no_daughters != parentchildrelation.childs
Try this:
SELECT id FROM tinfo t inner join
(SELECT parentid, COUNT(distinct language ) as childs FROM tinfo group by parentid) as summary
on t.id=summary.parentid and t.no_daughters!= summary.childs
try this
Select Distinct * From tablename t
Left Join
(
Select COUNT(t1.Id) Doughter,t1.parentid,t1.language From tablename t1 Group By t1.parentid,t1.language
)tbl
On t.id=tbl.parentid And tbl.language=t.language And t.no_daughter<>tbl.Doughter