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Juls Elli
I need to join three tables and return data that may not be in all three tables
3 Answer(s)      3 years and 10 months ago
Posted in : SQL


How do I join three tables and return information even if it is in only two of the tables


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December 1, 2010 at 2:13 PM


Hi Friend,

Please visit the following link:

Join Tables

Thanks



December 1, 2010 at 7:22 PM


I have my query setup as the example the issue is I need information to be returned even if it is not in all three tables. Example: I have table A, B and C. A is student names and addresses. B is contact information for students. C is transportation information for students. All students are in table A and table B. In table C only students that have transportation information are in the table. When I run my query with the two left joins and I do not get all the students, I only get the students that are in all three tables. How do I get all the information for students from table A and table B even if they are not in table C? Thanks!



December 1, 2010 at 11:17 PM


I was able to solve this by adding IS NULL for table B and C in the WHERE statement.



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