Tag: left-join

INNER/LEFT JOIN two tables and extend result with row [closed]

I have two tables which both have a row by the name “type”. It looks like this: events: ——————————– | id | title | type | ——————————– | 1 | …

Count rows after joining three tables in PostgreSQL

join left-join postgresql sql

Suppose I have three tables in PostgreSQL: Suppose I am using the using the following query: I get 50 as count. Whereas with: I get only 25 as count. What is my mistake in the second query? What can I do to get the same count? My requirement is that there is a single user table, referenced by multiple tables.

Get count of foreign key from multiple tables

aggregate-functions correlated-subquery left-join postgresql sql

I have 3 tables, with Table B & C referencing Table A via Foreign Key. I want to write a query in PostgreSQL to get all ids from A and also their total occurrences from B & C. Output desired (just the id from A & total count in B & C) : SQL so far SQL Fiddle : The

Counting number of joined rows in left join

count join left-join oracle sql

I’m trying to write an aggregate query in SQL which returns the count of all records joined to a given record in a table; If no records were joined to the given record, then the result for that record should be 0: Data My database looks like this (I’m not able to change the structure, unfortunately): (MESSAGEPART has a composite