I am not sure about your requirement. What I understood from your question is you want to delete all the emails of jobs which are closed. try this one; DELETE e FROM emailNotification e LEFT JOIN jobs j ON j.jobId = e.jobId WHERE j.active = 1 AND CURDATE() < j.closeDate
Currently, the theta-style on joining the unrelated classes in the where clause using HQL only supports inner join. The request for supporting the outer join for such situation is currently the 3-rd most voted enhancement but I don’t think this feature will be implemented in the near feature as it requires the re-implementation of the … Read more
I think you’re making this a bit more complicated than it needs to be. SELECT ProductID, SUM(IF(PaymentMethod = ‘Cash’, Amount, 0)) AS ‘Cash’, — snip SUM(Amount) AS Total FROM Payments WHERE SaleDate=”2012-02-10″ GROUP BY ProductID
You need to use multiple LEFT JOINs: SELECT ticket.ticket_id, a1.attr_val AS attr_val1, a2.attr_val AS attr_val2, a3.attr_val AS attr_val3 FROM ticket LEFT JOIN attr a1 ON ticket.ticket_id=a1.ticket_id AND a1.attr_type=1 LEFT JOIN attr a2 ON ticket.ticket_id=a2.ticket_id AND a2.attr_type=2 LEFT JOIN attr a3 ON ticket.ticket_id=a3.ticket_id AND a3.attr_type=3 Here is an example: SQL Fiddle.
You could use the following query: SELECT table1.id FROM table1 LEFT JOIN table2 ON table1.id IN (table2.user_one, table2.user_two) WHERE table2.user_one IS NULL; Although, depending on your indexes on table2 you may find that two joins performs better: SELECT table1.id FROM table1 LEFT JOIN table2 AS t1 ON table1.id = t1.user_one LEFT JOIN table2 AS t2 … Read more
After playing around a bit, this turns out to be trickier than I’d expected! Assuming that table_b has some single column that is unique (say, a single-field primary key), it looks like you can do this: SELECT table_a.code, table_a.emp_no, table_b.city, table_b.county FROM table_a LEFT JOIN table_b ON table_b.code = table_a.code AND table_b.field_that_is_unique = ( SELECT … Read more
They are the same thing in MySQL. A LEFT JOIN is a synonym or shorthand for LEFT OUTER JOIN.
Yes, it is possible. Firstly, .Include does a LEFT OUTER JOIN, using the navigational property you pass through. This is how you would explicitly do a LEFT JOIN between Student and StudentDescription: var query = from s in ctx.Students from sd in s.StudentDescriptions.DefaultIfEmpty() select new { StudentName = s.Name, StudentDescription = sd.Description }; As you … Read more
You have to be specific about the columns you are selecting. If your user table had four columns id, name, username, opted_in you must select exactly those four columns from the query. The syntax looks like: INSERT INTO user (id, name, username, opted_in) SELECT id, name, username, opted_in FROM user LEFT JOIN user_permission AS userPerm … Read more
MySQL use HAVING statement for this tasks. Your query would look like this: SELECT g.group_id, COUNT(m.member_id) AS members FROM groups AS g LEFT JOIN group_members AS m USING(group_id) GROUP BY g.group_id HAVING members > 4 example when references have different names SELECT g.id, COUNT(m.member_id) AS members FROM groups AS g LEFT JOIN group_members AS m … Read more