SQL Inner-join with 3 tables

Question

I m trying to join 3 tables in a view  here is the situation   I have a table that contains information of students who are applying to live on this College Campus  I have another table that lists the Hall Preferences  3 of them  for each Student  But each of these preferences are merely an ID Number  and the ID Number has a corresponding Hall Name in a third table  did not design this database       Pretty much  I have INNER JOIN on the table with their preferences  and their information  the result is something like      John Doe   923423   Incoming Student   005   Where 005 would be the HallID  So Now I want to match that HallID to a third table  where this table contains a HallID and HallName   So pretty much  I want my result to be like      John Doe   923423   Incoming Student   Foley Hall  lt --- INSTEAD OF 005    Here is what I currently have   SELECT   s StudentID  s FName     s LName  s Gender  s BirthDate  s Email     r HallPref1  r HallPref2  r HallPref3 FROM   dbo StudentSignUp AS s    INNER JOIN RoomSignUp dbo Incoming Applications Current AS r      ON s StudentID   r StudentID    INNER JOIN HallData dbo Halls AS h      ON r HallPref1   h HallID

User · Answer

This query will work for you  Select b id as  id   u id as  freelancer id   u name as   free lancer name   p user id as  project owner   b price as   bid price   b number of days as  days  from User u  Project p  Bid b  where b user id   u id and b project id   p id

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If you have 3 tables with the same ID to be joined  I think it would be like this   SELECT   FROM table1 a JOIN table2 b ON a ID   b ID JOIN table3 c ON a ID   c ID   Just replace   with what you want to get from the tables

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select empid empname managename  Management   cityname   from employees inner join Managment   on employees manageid   Managment ManageId      inner join CITY on employees Cityid CITY CityId   id name  managename  managment  cityname ---------------------------------------- 1  islam   hamza       it        cairo

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There have been plenty of responses but the overall lesson seems to be that you can use multiple JOINS in a where clause  also techonthenet com  my boss recommended it to me  that s how I found it  has good SQL tutorials if you ever have another question and you just want to try and figure it out    SELECT table1 column1 FROM table1 WHERE table1  gt  0  or whatever you want to specify  INNER JOIN table1  ON table1 column1   table2 column1

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SELECT    FROM      PersonAddress a       Person b      PersonAdmin c WHERE a addressid LIKE  97        AND b lastname LIKE  test       AND b genderid IS NOT NULL     AND a partyid   c partyid      AND b partyid   c partyid

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SELECT  A P NAME AS  INDIVIDUAL NAME  B F DETAIL AS  INDIVIDUAL FEATURE  C PL PLACE AS  INDIVIDUAL LOCATION  FROM   dbo   PEOPLE  A INNER JOIN   dbo   FEATURE  B ON A P FEATURE   B F ID INNER JOIN   dbo   PEOPLE LOCATION  C ON A P LOCATION   C PL ID

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SELECT column Name1 column name2          From tbl name1 tbl name2 tbl name3   where tbl name1 column name   tbl name2 column name    and tbl name2 column name   tbl name3 column name

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This is correct query for join 3 table with same id    select a empname a empsalary b workstatus b bonus c dateofbirth from employee a  Report b birth c where a empid b empid and a empid c empid and b empid  103     employee first table  report second table  birth third table

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select products product id  product name  price  created at  image name  categories category id  category name brands brand id  brand name  FROM products INNER JOIN categories USING  category id  INNER JOIN brands USING brand id

User · Answer

You can do the following  I guessed on table fields etc   SELECT s studentname       s studentid       s studentdesc       h hallname FROM students s INNER JOIN hallprefs hp     on s studentid   hp studentid INNER JOIN halls h     on hp hallid   h hallid   Based on your request for multiple halls you could do it this way  You just join on your Hall table multiple times for each room pref id   SELECT     s StudentID       s FName       s LName       s Gender       s BirthDate       s Email       r HallPref1       h1 hallName as Pref1HallName       r HallPref2        h2 hallName as Pref2HallName       r HallPref3       h3 hallName as Pref3HallName FROM  dbo StudentSignUp AS s  INNER JOIN RoomSignUp dbo Incoming Applications Current AS r      ON s StudentID   r StudentID  INNER JOIN HallData dbo Halls AS h1      ON r HallPref1   h1 HallID INNER JOIN HallData dbo Halls AS h2     ON r HallPref2   h2 HallID INNER JOIN HallData dbo Halls AS h3     ON r HallPref3   h3 HallID

User · Answer

SELECT table1 col table2 col table3 col  FROM table1  INNER JOIN   table2 INNER JOIN table3  ON table3 id table2 id   ON table1 id f-key  table2 id AND   add any additional filters HERE

User · Answer

You just need a second inner join that links the ID Number that you have now to the ID Number of the third table  Afterwards  replace the ID Number by the Hall Name and voil

[sql] SQL Inner-join with 3 tables?

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