Please consider the following code for testing purpose:
A Brief Description of what I've done with the code:
I have created a view for each of the connections, namely, first,second, third etc which is as
follows:(The reason I haven't chosen UNION to club all the queries is because I want the results to be displayed column wise rather than row.)
Similarly for second,third and all other connections.
Here is how I'm retrieving the results from the view:
Brief Description about what's happening in the Database:
I'm working on a large database of same kind as mentioned above. For example, I have a selected the folowing Date Range from the database: 2013-07-01 to
2013-08-01
Now, as far as first and second events are concerned I have "first" and "second" values listed for each and every date under the EVENTS column. To be
more precise, if I test it using COUNT() function, I can see the results like following:
For first connection:
Same is the case with second event. However, with the "third" event, it's not the same.I have "third" event listed under Events column for only couple of
dates, say for example 2013-07-02 and 2013-07-03 and I should see the following output:
But I'm not getting the above output. Instead, all other date values except 2013-07-02 and 2013-07-03 are filled with value 1 under the "number of third" events column. May I know why?
Code:
CREATE TABLE Mydatabase(
TableID_bi int,
EVENTS VARCHAR(200),
email VARCHAR(200),
Timedetail DATETIME
);
INSERT INTO `Mydatabase` (`TableID_bi`,`EVENTS`, `email`, `Timedetail`) VALUES
(1, 'first','email@gmail.com','2013-06-15' ),
(2, 'first','email2@gmail.com', '2013-06-15'),
(3, 'second','email3@gmail.com', '2013-06-15'),
(4, 'second','email4@gmail.com', '2013-06-15'),
(5, 'third','email5@gmail.com', '2013-06-15');A Brief Description of what I've done with the code:
I have created a view for each of the connections, namely, first,second, third etc which is as
follows:(The reason I haven't chosen UNION to club all the queries is because I want the results to be displayed column wise rather than row.)
Code:
create view firstview as
SELECT DATE(Timedetail) as Datefield1 ,
count(Timedetail) as firstoccurances,
Events
FROM Mydatabase
WHERE Events = "first" GROUP BY Datefield1 ;Here is how I'm retrieving the results from the view:
Code:
SELECT a.Datefield1
a.firstoccurances,
b.secondoccurances,
c.thirdoccurances
FROM firstview a,
secondview b,
thirdview c
WHERE a.Datefield1 = b.Datefield2
AND a.Datefield1 = c.Datefield3I'm working on a large database of same kind as mentioned above. For example, I have a selected the folowing Date Range from the database: 2013-07-01 to
2013-08-01
Now, as far as first and second events are concerned I have "first" and "second" values listed for each and every date under the EVENTS column. To be
more precise, if I test it using COUNT() function, I can see the results like following:
For first connection:
Code:
TimeDetail | Number of first events
2013-07-01 4
2013-07-02 2
2013-07-03 6
and so on
2013-08-01 5dates, say for example 2013-07-02 and 2013-07-03 and I should see the following output:
Code:
TimeDetail | Number of third events
2013-07-01 0
2013-07-02 1
2013-07-03 2
and so on
2013-08-01 0