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Questions tagged [right-join]

The RIGHT JOIN keyword will return all the rows from the right table, even if there are no matches in the left table.

SQL RIGHT JOIN ON returns the rows of INNER JOIN ON plus unmatched right table rows extended by NULLs. A consequence is that it returns all the rows from the right table at least once even if there are no matches in the left table. See examples here.

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query email, name, ip_address, referrer, user_agent, path

so I have this query but I want a result like this email name ip_address referrer user_agent path john@test.com John 127.0.0.1 google.com Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101…
shozue
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SQL JOIN,LEFT JOIN,RIGHT JOIN

I have 3 tables like TAB_1 ID NUMBER 1 101 2 102 3 103 4 104 5 105 6 106 7 107 8 108 9 109 10 110 TAB_2 ID NUMBER 1 101 2 102 3 105 TAB_3 ID NUMBER 1 104 2 107 3 110 The output needs to…
SUTHAR AKBARALI
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How do I join a many-to-many where the left table can be null OR the right table can be null?

Here is my schema and test data to create a minimum reproducible example: CREATE TABLE `scpsl_user_id_bans` ( `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT, `name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL, PRIMARY KEY…
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Why do results differ for dplyr left_join() and right_join() using these two dataframes

I am learning how to use the R dplyr 'join' functions by doing the exercises from this course: https://github.com/uclouvain-cbio/WSBIM1207 and got stuck on the problem described below. First, download the example dataframes used for this…
JohnJ
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Right outer join with where clause not returning expected results

I have a SQL statement that works perfectly: SELECT DailyRequest.* FROM DailyRequest RIGHT OUTER JOIN Facilities ON FacilityID = Facilities.ID This shows all the records in Facilities, as expected. However, I need to show only the…
John
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Selecting NULL values from two joined tables - not returning correct results (MySQL)

I use MySQL. I have three tables: Book, Publisher, Description. In those tables I have 2 books, 3 publishers and 1 description from publisher #1 Description contains three fields book_id, publisher_id, description I would like to select all records…
user1678312
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How to perform FULL JOIN, LEFT JOIN and RIGHT JOIN in PostgreSQL

I am new to PostgreSQL. We have given an activity to perform FULL JOIN, LEFT JOIN, AND RIGHT JOIN. I have an answer but I am not sure if it is right. I need some help to correct me. These are the questions and my answers. Perform a FULL JOIN on…
Lorai
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Why do left and right join ignore some values in a query?

I have a table with 3 columns and these values: col1 col2 col3 ------------------- 1 2 8 1 3 5 1 10 15 2 4 6 2 9 7 3 5 6 I join a query LEFT JOIN and RIGHT JOIN a grouping…
Charles_Y
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Right Outer Join does not work after inserting row

I have 2 table with the following data ManualVersions - list of all manual versions +------------------+---------------+--------------+ |Id | ManualID | VersionNumber | VersionName | +-----+------------+---------------+--------------+ |10 | …
Scott
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SQL issue with RIGHT JOINS

The following SQL query does exactly what it should do, but I don't know how to change it so it does what I need it to do. SELECT a.id AS comment_id, a.parent_comment_id, a.user_id, a.pid, a.comment, a.blocked_at, a.blocked_by, a.created_at,…
luikstruik
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Right and Left Join Together in SQL

I am trying to use a RIGHT and LEFT Join together. I have it working when only left joining one table. But I am trying to now include another table in my left join. It gives me an error saying I am missing an operator. Where am I missing a…
Jenna Terral
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How does R interpret the joins ? from left to right or right to left

I have a disagreement with a colleague over the below two answers so need a third opinion. Suppose you have 2 data frames: Salary and Employee. Question: Which command would you use to join Employee and Salary by matching the rows from Salary to…
analyst045
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Join three tables with CROSS JOIN

I have three tables: student: sub: marks: id | name id | sub stud_id | sub_id | marks ---+-------- ---+------------ --------+----------+------ 1 | Peter 1 | English 1 | 1 | 80 2 | Alice …
Vinil Lakkavatri
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Getting dates for each user - even if no activity in between

I have a problem, I feel like I know this but I cannot find a solution. I have a temp table where I generated a date range. TempTable Date 11/1/2017 11/2/2017 11/3/2017 11/4/2017 11/5/2017 Need to join to this table: Date User …
Martin H
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SQL Sets (intersect, Union, And Not)

I have what appears to be a simple query, but is alluding my boolean challenged mind (not enough java (the liquid kind) today). Three tables: Users = (UserID, Username, Enabled, LoggedIn, SessionID, Email, SettingsTableVersion, FullName, Initials,…
CodeWriter
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