Top "Left-join" questions

Remove Duplicates from LEFT OUTER JOIN

My question is quite similar to Restricting a LEFT JOIN, with a variation. Assuming I have a table SHOP and …

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SQL Server Left Join With 'Or' Operator

I have a four tables, TopLevelParent, two mid level tables MidParentA and MidParentB, and a Child table which can have …

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How to use aliases with MySQL LEFT JOIN

My original query is doing joins using the WHERE clause rather than JOIN. I realized that this was not returning …

mysql sql join left-join

MySQL Update Query using a left join

Table Schema Table Name: file_manager_folder Rows: id , parentId, name My query simulates moving a folder into another folder …

mysql left-join

Select first record in a One-to-Many relation using left join

I'm trying to join two tables using a left-join. And the result set has to include only the first record …

sql left-join

mysql subquery inside a LEFT JOIN

I have a query that needs the most recent record from a secondary table called tbl_emails_sent. That table …

mysql subquery left-join

How to do LEFT JOIN with more than 2 tables?

Currently I am doing this query: select a.x, b.x, c.x from number as a, customer as b, …

mysql sql left-join

Rails ActiveRecord :joins with LEFT JOIN instead of INNER JOIN

I have this code User.find(:all, :limit => 10, :joins => :user_points, :select => "users.*, count(user_points.id)", :…

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Deleting using LEFT JOIN

I want to delete from a table depending on data that exists on another table that references the first, however, …

sql postgresql join left-join

SQL Server LEFT JOIN and WHERE clause

Here is my code SELECT ID, Name, Phone FROM Table1 LEFT JOIN Table2 ON Table1.ID = Table2.ID WHERE Table1.…

sql sql-server left-join