|
|
I insert and update in an excel database but what is the coding to prevent the duplicating entries in the database. Plz tell in c# language. thanx in advance.
|
|
|
|
|
I have a table of employee attendent like that:
EmpID-----Date----------------Time------------------Status (Field Name)
1-------01/01/2009------01/01/2009 8:00 am--------I
1-------01/01/2009------01/01/2009 12:00 am-------O
1-------01/01/2009------01/01/2009 1:00 pm--------I
1-------01/01/2009------01/01/2009 5:00 pm--------O
2-------01/01/2009------01/01/2009 7:50 am--------I
2-------01/01/2009------01/01/2009 12:00 am-------O
But i want to make a query that take data from table above to be like that:
EmpID-----Date------------In------------Out----------In-------------Out (Fiel Name)
1-------01/01/2009------8:00 am-----12:00 am----1:00 pm------5:00 pm
2-------01/01/2009------7:50 am-----12:00 am----Null----------Null
Can we do that ?
Thank for your kindly to help me...
Best regard,
Sovann
VB.Net
modified on Sunday, February 15, 2009 9:18 PM
|
|
|
|
|
Something like this should get you close
<br />
select c.empid, c.dt as in1, <br />
<br />
(select c1.dt from clock as c1 where c1.empid = c.empid and status = 'O'<br />
and not exists (select 1 from clock as c2 where c2.empid = c1.empid and c2.status = 'O' and c2.dt < c1.dt)) as out1,<br />
<br />
(select c1.dt from clock as c1 where c1.empid = c.empid and status = 'I'<br />
and c1.dt > c.dt) as in2,<br />
<br />
<br />
<br />
(select c1.dt from clock as c1 where c1.empid = c.empid and status = 'O'<br />
and c1.dt > (select c1.dt from clock as c1 where c1.empid = c.empid and status = 'I'<br />
and c1.dt > c.dt)) as out2<br />
<br />
from clock as c<br />
where c.status = 'I'<br />
and not exists (select 1 from clock as c1 where c1.empid = c.empid and c1.status = 'I' and c1.dt < c.dt)
___________________________________________
.\\axxx
(That's an 'M')
|
|
|
|
|
Thanks for your kindly to help me.
but what you wrote is in query right ?
It did not process.
but if there are more employee, Does it work ?
My idea if we select and use for loop, what can we do ?
VB.Net
|
|
|
|
|
Sovann wrote: Thanks for your kindly to help me.
No worries
Sovann wrote: but what you wrote is in query right ?
Yes - just plain SQL - so you can put it in a stored proc or whatever
Sovann wrote: It did not process
? in what way. I created a dummy table and entered data similar to your example, ran the query against it and got your desired results.
The column and table names were different to yours, but the query certainly worked fine...
Sovann wrote: but if there are more employee, Does it work ?
I think it should work as long as there is always an In and Out (not sure what it would do if there was only an In time and no Out - or if there were more than two of each. It doesn't matter how many employees there are.
Sovann wrote: My idea if we select and use for loop, what can we do ?
If you WANT to write loops etc. then sure, you could do that. You could create a temporary table, populate it using a number of queries in a loop, or whatever you want to do. Depends whether your aim is to solve the problem or to write some sql using a for loop?
___________________________________________
.\\axxx
(That's an 'M')
|
|
|
|
|
I want to write some sql using for loop. Because i do not know that about number of employee. It will increase when we add new employee info.
VB.Net
|
|
|
|
|
Sovann wrote: I want to write some sql using for loop.
If that is what you want to do (i.e. you want to write loop rather than you want to achive the results most efficiently) then take a look here[^] or an example -but read the highlighted bit abut this being inefficient!
Sovann wrote: Because i do not know that about number of employee. It will increase when we add new employee info.
The SQL I wrote will handle any number of employees..
select c.empid, c.dt as in1,
(select c1.dt from clock as c1 where c1.empid = c.empid and status = 'O'
and not exists (select 1 from clock as c2 where c2.empid = c1.empid and c2.status = 'O' and c2.dt < c1.dt)) as out1,
(select c1.dt from clock as c1 where c1.empid = c.empid and status = 'I'
and c1.dt > c.dt) as in2,
(select c1.dt from clock as c1 where c1.empid = c.empid and status = 'O'
and c1.dt > (select c1.dt from clock as c1 where c1.empid = c.empid and status = 'I'
and c1.dt > c.dt)) as out2
from clock as c
where c.status = 'I'
and not exists (select 1 from clock as c1 where c1.empid = c.empid and c1.status = 'I' and c1.dt < c.dt)
the bit not crossed out selects all employees records with an 'In' status where there is not an earlier I status record - i.e. it selects the first In record for the employee. Obviously, if you need to look at multiple days, you will need to change this slightly so that it tests the date and time separately (I wasn't sure from your question whether these were stored in separate columns or not)
So - the SQL will work as it stands with any number of employees, for a single date. Simply expand it a bit to allow multiple dates and it will give you what you want.
OK - I couldn't resist, so I expanded it.
SELECT EmpId, Dt AS in1,
(SELECT Dt
FROM clock AS c1
WHERE (EmpId = c.EmpId) AND (status = 'O') AND (NOT EXISTS
(SELECT 1 AS Expr1
FROM clock AS c2
WHERE (EmpId = c1.EmpId) AND (status = 'O') AND (Dt < c1.Dt) AND (FLOOR(CAST(Dt AS Float)) = FLOOR(CAST(c1.Dt AS Float))))) AND
(FLOOR(CAST(Dt AS Float)) = FLOOR(CAST(c.Dt AS Float)))) AS out1,
(SELECT Dt
FROM clock AS c1
WHERE (EmpId = c.EmpId) AND (status = 'I') AND (Dt > c.Dt) AND (FLOOR(CAST(Dt AS Float)) = FLOOR(CAST(c.Dt AS Float)))) AS in2,
(SELECT Dt
FROM clock AS c1
WHERE (EmpId = c.EmpId) AND (status = 'O') AND (Dt >
(SELECT Dt
FROM clock AS c1
WHERE (EmpId = c.EmpId) AND (status = 'I') AND (Dt > c.Dt) AND (FLOOR(CAST(Dt AS Float)) = FLOOR(CAST(c.Dt AS Float))))) AND
(FLOOR(CAST(Dt AS Float)) = FLOOR(CAST(c.Dt AS Float)))) AS out2
FROM clock AS c
WHERE (status = 'I') AND (NOT EXISTS
(SELECT 1 AS Expr1
FROM clock AS c1
WHERE (EmpId = c.EmpId) AND (status = 'I') AND (Dt < c.Dt) AND (FLOOR(CAST(Dt AS Float)) = FLOOR(CAST(c.Dt AS Float)))))
That should work, I think, for all dates for any number of employees, where there is at least in 'I' record for any one employee on a date (i.e. if the employee doesn't turn up at all on one day there will be no output for that employee.
___________________________________________
.\\axxx
(That's an 'M')
|
|
|
|
|
I wrote similar like what you wrote but it did not work.
Sorry i do not understand SQL you wrote. i think Dt is Date field right ? what about Time field ? I do not know which one is Date and one is Time...
Sorry, If it should work and you show me the result to sure that what you write is what i want...
I am very glad and to say thanks you so much for your help me...
It had help me some knowledge about SQL...
I will try to find it more and try to change other way to get the result what i want.
If you have any some about it, please share to me.
Thanks you again.
Best regard,
Sovann
VB.Net
|
|
|
|
|
I wasn't sure whether there was a date and a time field - or a single datetime field in your DB - I had assumed a single datetime field which I called dt.
FLOOR(CAST(Dt AS Float)) gives you just the Date portion of your DateTime field. if you have separate Date and Time fields you can replace
FLOOR(CAST(Dt AS Float))
by
dt
if your date field is called dt
The idea of the query is that it selects all records for all employees where there is an 'In' record ... so this
WHERE (status = 'I') AND (NOT EXISTS
(SELECT 1 AS Expr1
FROM clock AS c1
WHERE (EmpId = c.EmpId) AND (status = 'I') AND (Dt < c.Dt) AND (FLOOR(CAST(Dt AS Float)) = FLOOR(CAST(c.Dt AS Float)))))
selects where is is an In record (status = 'I') and
There are no records (not exists) for the same employee (empId = c.EmpId) that is an 'In' record (status = 'I') where the datetime is earlier (dt < c/DT) and the Date is the same.
You could rewrite this if you have a date column called dt and a time column called tm as
(EmpId = c.EmpId) AND (status = 'I') AND (tm < c.tm) AND (dt = c.Dt )
which makes it easier to read!
You can see then that this logic is just checking that tehre are no In records, for this employee, for the same date, that are earlier in the day - or, in other words, only include records that are the first In record for the day.
Having got this record, the first Out column, second In and Out columns are all based upon this record
I'm not on the computer where I created the database to test this right now - when I am, if I have time, I will change it to look like your DB and chaneg teh SQL for you - but if you follow my advice above, you should get there!@
good luck
___________________________________________
.\\axxx
(That's an 'M')
|
|
|
|
|
Thank you so much.
Yes i will follow your advice.
I hope i can get the result like what i want.
If still not, try other way more...
Thank you again.
Good luck too
VB.Net
|
|
|
|
|
In your example result you have 2 In columns and 2 Out columns. But what happens if a person goes in and out 3 or 4 times a day?
|
|
|
|
|
if a person goes in and out 3 or 4 time a day, one field will get null...
VB.Net
|
|
|
|
|
Sovann wrote: if a person goes in and out 3 or 4 time a day, one field will get null...
Don't quite understand. What field?
What I mean is that can a person go in and out undefined number of times during the same day? If he can, do you plan to use dynamic amount of columns (person, in1, out1, in2, out2, in3, out3...). Since this is very hard to achieve using plain sql
|
|
|
|
|
Oh sorry.
No over that columns bro.
that columns is (EmpID,Date,In1,Out1,In2,Out2) so each employee will have 4 attendants but some day they will absent in afternoon so their attendants will be just only 2 so
in columns In2, Out2 data will null. More is number of employee.
at the first i posted, i want to change data in Employee table like table under it. (hm... maybe is called crosstab.)
VB.Net
|
|
|
|
|
Hi
i am stuck in some issues professionally regarding Ab Inito, is there any one who can guide me as to how to go about this Ab Initio things, mates it is really compliv\cated and there is very limited resource available on net regarding Ab Inito......
This is an urgent requirement.......... 
|
|
|
|
|
PoisonCreed wrote: This is an urgent requirement.
but not urgent enough to contact their support team, which is listed on their website.
Bob
Ashfield Consultants Ltd
Proud to be a 2009 Code Project MVP
|
|
|
|
|
I have already contacted their support team 15 days back , even asking them as to how to go about if i have to purchase the licensed copy of the product. but their answer is inconclusive and way of the track ......
Well what i have gathered so far is that company is very discreet and miser in disclosing any of their trade secrets regarding the product and hardly there is any more information regrading it available on web itself, i hardly found anything substantial so far.....
|
|
|
|
|
PoisonCreed wrote: that company is very discreet and miser in disclosing any of their trade secrets
I wouldn't expect them to reveal trade secrets, but they should have a decent support dept.
PoisonCreed wrote: to purchase the licensed copy
That may be the problem, I wouldn't give much support for a free version.
But, I would say, if they don't offer decent support use another product, there are plenty of other tools out there.
Bob
Ashfield Consultants Ltd
Proud to be a 2009 Code Project MVP
|
|
|
|
|
Dear Folk,
I am new in SQL Server.I just installed MS SQL Server 2005 in my system(Wista Ultimate) but cant see the query builder or enterprise prise Manager.is there new way installing it to get those two things?
hope your reply,
|
|
|
|
|
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
