Top "Outer-join" questions

An outer join defines a relationship between two tables where all records from one or both tables are returned regardless of the existence of a matching key-field in the other table.

How to replace a complex SQL MINUS query with LEFT OUTER JOIN equivalent

Trying to figure how how to replace the following, with equivalent left outer join: select distinct(a.some_value) from …

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What is the purpose (or use case) for an outer join in SQL?

Is an outer join only used for analysis by the developer? I'm having trouble finding a use case for why …

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Are left outer joins associative?

It's easy to understand why left outer joins are not commutative, but I'm having some trouble understanding whether they are …

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SQL : FULL OUTER JOIN on null columns

I want to use a FULL OUTER JOIN between two tables on several columns, but when both columns are null, …

sql oracle join outer-join
C# Outer Apply in LINQ

How can I achieve Outer Apply in LINQ? I'm having a bit of a problem. Here's the SQL Query I'm …

c# .net linq outer-join
How do you combine an inner and outer join in mysql

I can do it in sybase and I can do it in oracle, but I'm not seeing how to do …

mysql inner-join outer-join
Linq to entities Left Join

I want to achieve the following in Linq to Entities: Get all Enquires that have no Application or the Application …

linq linq-to-entities left-join outer-join
mySQL outer join

I have 2 tables for which I need to run a query on Table1 has 2 fields: l_id, and name Table2 …

mysql join outer-join
Outer Join with ORM mapping in SQLAlchemy

I am using the ORM Mapping in SQLAlchemy 0.6.8. I have three tables (A, B and C), with no foreign keys …

orm join sqlalchemy outer-join
merge.data.table with all=True introduces NA row. Is this correct?

Doing a merge between a populated data.table and another one that is empty introduces one NA row in the …

r data.table outer-join