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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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Listing data with join in SQL

I have the following question related to joining tables together in SQL: List all products that have not been sold on 13.05.2003. Taking into account the tables Orders, LineItem and Product. What I have coded is the following: SELECT p.Pid,…
Maria
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How to join two tables in sql according to a determined value?

I have the following tables and I have to get all orders of customer Meier. Table Customer with columns cid and name: cid name ------------------------- 13 M. Mueller 17 A. Meier 23 I. Schulze Table…
Maria
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Can we Use Venn Diagrams to Characterise the Relationship between INNER, OUTER, LEFT and RIGHT JOINs?

A related question & answer (Is It Appropriate to use Venn Diagrams to Depict SQL Joins where the Tables are Sets?) demonstrate that it is inappropriate to characterise joins, in general, with the following Venn diagram: However, my intuition still…
Colm Bhandal
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Right join vs left join, which table is left vs right?

Given select * from a left join b on a.id = b.id is table a left and table b right? Would that be equivalent to Select * from a right join b on b.id = a.id because I switched left and right while flipping the ON clause? Or is a still left…
tenmiles
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MySQL: Count(*) NULL -> 0 with right join

I'm close to finishing a LeetCode hard problem. The idea is find the cancellation rate (percent) for a date range given that neither the driver or the client has been banned from a ride sharing service. The problem I'm running into is that on…
j9000
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How JOIN works internally in MySQL?

Here is my test script, there is no primary key as ID, test case is to join multiple rows having same key, and result in how many rows. create table Test1(id integer, name varchar(100)); insert into Test1(id, name) values(1, "Vijay"); insert into…
vijay karma
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2 tables - trying a RIGHT UNION, to replace fields in Table 2

2 tables - trying a RIGHT UNION, to replace fields in Table 2 but still keep all the contents of Table 2. Ultimately what I am trying to do is populate the tcrutm column of table 2 with the entries based on table 1 while using PartNumber and mcno…
Ben
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Find the count of categories from a table

I am trying to develop an enquiry management system for an institute. I have 3 tables in mysql db. leads_course_category table keeps course categories and has the columns: category_id, category_name, category_created_time,…
RatheeshTS
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Left and Right Join Giving the same output

Im trying to do Left and Right join but its not working properly . Lemme show you.. Student Table Address Table What's i'm doing? SELECT * FROM student JOIN address ON student.tid = address.stud_tid Output: SELECT * FROM student LEFT JOIN…
Amritesh
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right join of Yii2 framework

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