Lets say I have this table :
--------------------------------------------------------------------------
| id | allowed_to_play_pokemon_go_after | last_played_pokemon_go | name |
--------------------------------------------------------------------------
| 1 | 20-JUL-16 | 19-JUL-16 | Jhon |
--------------------------------------------------------------------------
| 2 | 19-JUL-16 | 21-JUL-16 | Bill |
--------------------------------------------------------------------------
Now I want to make a select like that :
SELECT name, (last_played_pokemon_go > allowed_to_play_pokemon_go_after) as must_punish
FROM myTable;
Where 'must_punish' has to bo a boolean (1/0).
You can use case:
SELECT name,
(case when last_played_pokemon_go > allowed_to_play_pokemon_go_after then 1 else 0
end) as must_punish
FROM myTable;
Oracle (the database) doesn't have a boolean data type. A number should be fine.
Related
I need help getting the User which has an 'IN' and 'Out' in Column isIN. If the user has an IN and OUT do not select them in the list. I need to select the user who has only had an IN. Please I need help. Thanks in advance.
This is the table:
| Users | IsIN |
|:------------------:|:-----:|
| MHYHDC61TMJ907867 | IN |
| MHYHDC61TMJ907867 | OUT |
| MHYHDC61TMJ907922 | IN |
| MHYHDC61TMJ907922 | OUT |
| MHYHDC61TMJ907923 | IN |
| MHYHDC61TMJ907923 | OUT |
| MHYHDC61TMJ907924 | IN | - I need to get only this row
| MHYHDC61TMJ907925 | IN |
| MHYHDC61TMJ907925 | OUT |
| MHYHDC61TMJ908054 | IN | - I need to get only this row
| MHYHDC61TMJ908096 | IN | - I need to get only this row
| MHYHDC61TMJ908109 | IN | - I need to get only this row
Need to get the result like
| Users | IsIN |
|:------------------:|:-----:|
| MHYHDC61TMJ907924 | IN |
| MHYHDC61TMJ908054 | IN |
| MHYHDC61TMJ908096 | IN |
| MHYHDC61TMJ908109 | IN |
I tried using this query and sample query below but it doesn't work.
select s.[Users], s.[isIn] [dbo].[tblIO] s
where not exists (
select 1
from [dbWBS].[dbo].[tblIO] s2
where s2.[Users] = s.[Users] and s2.isIn = 'IN'
);
You can use not exists:
select s.*
from sample s
where not exists (select 1
from sample s2
where s2.user = s.user and s2.inout = 'OUT'
);
If you want only users that meet the condition (and not the full rows):
select user
from sample s
group by user
having min(inout) = max(inout) and min(inout) = 'IN';
Bearing in mind that an 'OUT' IsIn must be always preceded by an 'IN' record, you could use a query like this:
select s.Users, 'IN' as IsIn
from sample s
group by s.Users
having count(distinct s.IsIn) = 1
I am sure this is easy to accomplish but after spending the whole day trying I had to give up and ask for your help.
I have a table that looks like this
| PatientID | VisitId | DateOfVisit | FollowUp(Y/N) | FollowUpWks |
----------------------------------------------------------------------
| 123456789 | 2222222 | 20180802 | Y | 2 |
| 123456789 | 3333333 | 20180902 | Y | 4 |
| 234453656 | 4443232 | 20180506 | N | NULL |
| 455344243 | 2446364 | 20180618 | Y | 12 |
----------------------------------------------------------------------
Basically I have a list of PatientIDs, each patient can have multiple visits (VisitID and DateOfVisit). FollowUp(Y/N) specifies whether the patients has to be seen again and in how many weeks (FollowUpWks).
Now, what I need is a query that extracts PatientsID, DateOfVisit (the most recent one and only if FollowUp is YES) and the FollowUpWks field.
Final result should look like this
| PatientID | VisitId | DateOfVisit | FollowUp(Y/N) | FollowUpWks |
----------------------------------------------------------------------
| 123456789 | 3333333 | 20180902 | Y | 4 |
| 455344243 | 2446364 | 20180618 | Y | 12 |
----------------------------------------------------------------------
The closest I could get was with this code
SELECT PatientID,
Max(DateOfVisit) AS LastVisit
FROM mytable
WHERE FollowUp = True
GROUP BY PatientID;
The problem is that when I try adding the FollowUpWks field to the SELECT I get the following error: "The query does not include the specified expression as part of an aggregate function." However, if I add FollowUpWks to the GROUP BY statement than I get all visits, not just the most recent ones.
You need to match back to the most recent visit. One method uses a correlated subquery:
SELECT t.*
FROM mytable as t
WHERE t.FollowUp = True AND
t.DateOfVisit = (SELECT MAX(t2.DateOfVisit)
FROM mytable as t2
WHERE t2.PatientID = t.PatientID
);
I'm wondering if SQL Server (i.e. the T-SQL language) has a natural way of doing this or if I have to write fancy constraints/triggers.
Suppose I have a table
RebuplicanCandidates
===================================
Id | Name | ByteIndex
===================================
1 | 'Marco Rubio' | 0
2 | 'Jeb Bush' | 1
3 | 'Donald Trump' | 2
4 | 'Ted Cruz' | 3
and I remove JebBush:
DELETE FROM [RepublicanCandidates] WHERE [Id]=2
Then I want the table to be like
RebuplicanCandidates
===================================
Id | Name | ByteIndex
===================================
1 | 'Marco Rubio' | 0
3 | 'Donald Trump' | 1
4 | 'Ted Cruz' | 2
Notice that the ByteIndex column shuffled.
And then if I insert a candidate
INSERT INTO [RepublicanCandidates] (Name) VALUES ('CarlyFiorina')
the table becomes
RebuplicanCandidates
===================================
Id | Name | ByteIndex
===================================
1 | 'Marco Rubio' | 0
3 | 'Donald Trump' | 1
4 | 'Ted Cruz' | 2
5 | 'Carly Fiorina' | 3
If you created a VIEW based on the table, you could add a row_number() function, and drop the ByteIndex column from the base table.
CREATE VIEW vRebuplicanCandidates
AS
SELECT id, name , ROW_NUMBER() OVER (ORDER BY id) - 1 AS ByteIndex
FROM RebuplicanCandidates
T-SQL cannot do what your are asking. You will have to write some code or the suggestion in the other answer by is a good one IMHO.
I have a table in which several indentifiers of a person may be stored. In this table I would like to create a single calculated identifier column that stores the best identifier for that record depending on what identifiers are available.
For example (some fictional sample data) ....
Table = "Citizens"
Id | LastName | DL-No | SS-No | State-Id-No | Calculated
------------------------------------------------------------------------
1 | Smith | NULL | 374-784-8888 | 7383204848 | ?
2 | Jones | JG892435262 | NULL | NULL | ?
3 | Trask | TSK73948379 | NULL | 9276542119 | ?
4 | Clinton | CL231429888 | 543-123-5555 | 1840430324 | ?
I know the order in which I would like choose identifiers ...
Drivers-License-No
Social-Security-No
State-Id-No
So I would like the calculated identifier column to be part of the table schema. The desired results would be ...
Id | LastName | DL-No | SS-No | State-Id-No | Calculated
------------------------------------------------------------------------
1 | Smith | NULL | 374-784-8888 | 7383204848 | 374-784-8888
2 | Jones | JG892435262 | NULL | 4537409273 | JG892435262
3 | Trask | NULL | NULL | 9276542119 | 9276542119
4 | Clinton | CL231429888 | 543-123-5555 | 1840430324 | CL231429888
IS this possible? If so what SQL would I use to calculate what goes in the "Calculated" column?
I was thinking of something like ..
SELECT
CASE
WHEN ([DL-No] is NOT NULL) THEN [DL-No]
WHEN ([SS-No] is NOT NULL) THEN [SS-No]
WHEN ([State-Id-No] is NOT NULL) THEN [State-Id-No]
AS "Calculated"
END
FROM Citizens
The easiest solution is to use coalesce():
select c.*,
coalesce([DL-No], [SS-No], [State-ID-No]) as calculated
from citizens c
However, I think your case statement will also work, if you fix the syntax to use when rather than where.
my table name is tbl1. The fileds are id,name,txdate.
| ID | NAME | TXDATE |
| 1 | RAJ | 1-1-2013 |
| 2 | RAVI | |
| 3 | PRABHU | 25-3-2013 |
| 4 | SAT | |
Now i want to use select query for check txdate < 2-2-2013 in which rows have txdate not empty and the select also retrun which rows have txdate empty.
The Result is like this
| ID | NAME | TXDATE |
| 1 | RAJ | 1-1-2013 |
| 2 | RAVI | |
| 4 | SAT | |
Any feasible solution is there?.
With out using union it is possible?.
Assuming that the TXDATE is of data type DATE then you can use WHERE "TXDATE" < '2013-2-2' OR "TXDATE" IS NULL. Something like:
SELECT *
FROM table1
WHERE "TXDATE" < '2013-2-2'
OR "TXDATE" IS NULL;
See it in action:
SQL Fiddle Demo
I don't now what database your are using and what data type the TXDATE is.
I just tried on my postgreSQL 9.2, with a field "timestamp without time zone".
I have three rows in the table , like:
ac_device_name | ac_last_heartbeat_time
----------------+-------------------------
Nest-Test1 |
Nest-Test3 |
Nest-Test2 | 2013-04-10 15:06:18.287
Then use below statement
select ac_device_name,ac_last_heartbeat_time
from at_device
where ac_last_heartbeat_time<'2013-04-11';
It is ok to return only one record:
ac_device_name | ac_last_heartbeat_time
----------------+-------------------------
Nest-Test2 | 2013-04-10 15:06:18.287
I think you can try statement like:
select * from tbl1 where TXDATE<'2-2-2013' and TXDATE is not NULL
this statement also works in my environment.