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SQL Query giving duplicate records


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  #1  
Old January 23rd, 2013, 10:29 AM
wizard210 wizard210 is offline
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SQL Query giving duplicate records
I'm trying to pull from our database all the students that are absent on a certain day. I have it where I get all the students but it's duplicating records and I don't know why.

Code:
select emf.L_NAME,emf.F_NAME, atn.ID_NUMBER, atn.SAF_CODE, atn.SAF_DATE1
from EMF 
INNER Join ATN 
ON EMF.ID_NUMBER=ATN.ID_NUMBER 
Where atn.SAF_CODE='ne' and atn.SAF_DATE1='1-22-2013'
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Old January 23rd, 2013, 11:25 AM
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most likely because there are multiple ATNs for each EMF (whatever they are)
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Old January 23rd, 2013, 11:29 AM
wizard210 wizard210 is offline
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Quote:
Originally Posted by r937
most likely because there are multiple ATNs for each EMF (whatever they are)


If that's the case then what can I do about it?
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Old January 23rd, 2013, 11:44 AM
wizard210 wizard210 is offline
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So how would I do this then.

I have three tables that I need information from.

ATN where I need attendance code, attendance date, id_number of all the students that are absent on todays date

Contact Table where I need the phone number for the ID number from the ATN table

and the EMF table where I need the first name and last name of the ID number that I am getting from the ID_Number from the ATN table
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Old January 23rd, 2013, 04:02 PM
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suddenly, there are three tables instead of two

the duplicates per student are doubtless coming from duplicate contacts
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