outer-join
How to do a full outer join in Linq?
I think I have the answer here, which is not as elegant as I’d hoped, but it should do the trick: var studentIDs = StudentClasses.Select(sc => sc.StudentID) .Union(StudentTeachers.Select(st => st.StudentID); //.Distinct(); — Distinct not necessary after Union var q = from id in studentIDs join sc in StudentClasses on id equals sc.StudentID into jsc from … Read more
Opposite Of An Inner Join Query
Select * from table1 left join table2 on table1.id = table2.id where table2.id is null
How can we differ LEFT OUTER JOIN vs Left Join [duplicate]
They are the same thing in MySQL. A LEFT JOIN is a synonym or shorthand for LEFT OUTER JOIN.
SQL SELECT from multiple tables
SELECT p.pid, p.cid, p.pname, c1.name1, c2.name2 FROM product p LEFT JOIN customer1 c1 ON p.cid = c1.cid LEFT JOIN customer2 c2 ON p.cid = c2.cid
How to return rows from left table not found in right table?
Try This SELECT f.* FROM first_table f LEFT JOIN second_table s ON f.key=s.key WHERE s.key is NULL For more please read this article : Joins in Sql Server
Difference between RIGHT & LEFT JOIN vs RIGHT & LEFT OUTER JOIN in SQL [duplicate]
There is no difference between RIGHT JOIN and RIGHT OUTER JOIN. Both are the same. That means that LEFT JOIN and LEFT OUTER JOIN are the same. Visual Representation of SQL Joins
Top 1 with a left join
Use OUTER APPLY instead of LEFT JOIN: SELECT u.id, mbg.marker_value FROM dps_user u OUTER APPLY (SELECT TOP 1 m.marker_value, um.profile_id FROM dps_usr_markers um (NOLOCK) INNER JOIN dps_markers m (NOLOCK) ON m.marker_id= um.marker_id AND m.marker_key = ‘moneyBackGuaranteeLength’ WHERE um.profile_id=u.id ORDER BY m.creation_date ) AS MBG WHERE u.id = ‘u162231993’; Unlike JOIN, APPLY allows you to reference … Read more
LINQ to SQL – Left Outer Join with multiple join conditions
You need to introduce your join condition before calling DefaultIfEmpty(). I would just use extension method syntax: from p in context.Periods join f in context.Facts on p.id equals f.periodid into fg from fgi in fg.Where(f => f.otherid == 17).DefaultIfEmpty() where p.companyid == 100 select f.value Or you could use a subquery: from p in context.Periods … Read more
Oracle “(+)” Operator
That’s Oracle specific notation for an OUTER JOIN, because the ANSI-89 format (using a comma in the FROM clause to separate table references) didn’t standardize OUTER joins. The query would be re-written in ANSI-92 syntax as: SELECT … FROM a LEFT JOIN b ON b.id = a.id This link is pretty good at explaining the … Read more