1. angelIII427,785
2. rrjegan17406,817
3. aneeshatti...252,613
4. matthews...190,209
5. mwvisa1166,846
6. BillBach150,300
7. tbsgadi126,072
8. mrjoltcola125,783
9. mark_wills115,373
10. pcelba111,501
11. ralmada101,009
12. cxr96,770
13. RiteshShah90,847
14. chapmandew85,212
15. dportas78,762
16. capricorn178,082
17. Sharath_...74,540
18. nemws173,528
19. acperkins69,444
20. reb7368,884
21. sdstuber65,775
22. Ray_Pas...65,503
23. DanielWilson64,966
24. jimpen64,166
25. BrandonG...60,454

1. angelIII2,294,987
2. aneeshatti...747,066
3. matthews...746,535
4. Arthur_...726,125
5. peter57r509,176
6. jrb1502,304
7. acperkins434,671
8. rrjegan17406,817
9. mark_wills395,946
10. capricorn1387,179
11. jimpen337,948
12. Lowfatsp...329,408
13. chapmandew311,403
14. jimhorn301,827
15. BillBach287,035
16. rockiroads251,181
17. SjoerdVer...245,577
18. Kevin3NF233,726
19. dqmq225,911
20. DatabaseMX223,266
21. mwvisa1195,267
22. dportas193,730
23. LSMCons...178,794
24. cactus_d...175,834
25. sdstuber169,346

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7.2

Noobie SQL INNER JOIN question

Asked by JenniQ in Databases Miscellaneous

Tags: inner, join, sql

OK, so I have a table that looks like this:

FriendId (int) | UserId (int)

This basically provides a way to track the relationship between a user and their friends... like myspace or friendster.

Now each time I add a friend i only add one entry. Say the user id = 9 and friend id = 7, so it would look like this:

FriendID UserId
7 9

So now i want to display the users friends. their friends can be either added by the friend or the user, there my query needed to look like this:

Here is a simplified version:

SELECT * from Friend A
left JOIN user B ON B.UserId = A.FriendId
LEFT JOIN Image C on B.MainImgId = C.ImageId
WHERE A.UserId = @userid OR A.FriendID = @UserID

This is problimatic, as I'm sure you can see. The problem is that

1) it pulls duplicate records
2) it shows the user as a friend because that satifies it conditions.

Can you offer a better way to write this simple query??

Thanks!!

-- jenni

View the Solution FREE for 30 Days

20090824-EE-VQP-74

Noobie SQL INNER JOIN question

Asked by JenniQ in Databases Miscellaneous

Tags: inner, join, sql

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