I have a star schema here and I am querying the fact table and would like to join one very small dimension table. I can’t really explain the following: EXPLAIN ANALYZE SELECT COUNT(impression_id), …
Tag: join
ORA – 00933 confusion with inner join and “as”
I have this query of getting data from two tables using an inner join, but I get the error SQL command not properly ended with an asterix under “as”: select P.carrier_id, O.order_id, O.aircraft_id, O….
Joining multiple tables in SQL
Can sombody Explains me about joins? Inner join selects common data based on where condition. Left outer join selects all data from left irrespective of common but takes common data from right table and vice versa for Right outer. I know the basics but question stays when it comes to join for than 5, 8, 10 tables. Suppose I have
Filter Table Before Applying Left Join
I have 2 tables, I want to filter the 1 table before the 2 tables are joined together. Customer Table: Entry Table: I want to Left Join so I get all records from the Customer table regardless of whether there are related records in the Entry table. However I want to filter on category D in the entry table before
Join a count query on generate_series() and retrieve Null values as ‘0’
I want to count ID’s per month using generate_series(). This query works in PostgreSQL 9.1: This is my output: But what I want to get is this output (‘0’ value in January): Months without id should be listed nevertheless. Any ideas how to solve this? Sample data: Answer Untangled, simplified and fixed, it might look like this: db<>fiddle here Among
Query using ILIKE with IN
Is it possible to run a query using ILIKE with the IN function? For example: I want to run the results returned from the nested query through the ILIKE function. Is there a way to do this? Answer Can be simpler: You can check the resulting query plan with EXPLAIN ANALYZE. You may need to add leading and trailing %
FULL OUTER JOIN vs. FULL JOIN
Just playing around with queries and examples to get a better understanding of joins. I’m noticing that in SQL Server 2008, the following two queries give the same results: Are these performing exactly the same action to produce the same results, or would I run into different results in a more complicated example? Is this just interchangeable terminology? Answer Actually
JOIN two SELECT statement results
Is it possible to join the results of 2 sql SELECT statements in one statement? I have a database of tasks where each record is a separate task, with deadlines (and a PALT, which is just an INT of days from start to deadline. Age is also an INT number of days.) I want to have a table which has
How to write an “exclusive” query in SQL?
I am going over a past paper for a database course I am taking and I am stuck on an SQL question Here is the schema provided Country(name, capital, area), name is the key People(country, population, children, adult) where country refers to the name in Country, population is the total population, and children and adult is the percentage of the
Difference between SQL JOIN and querying from two tables
What is the difference between the query and this one Answer There is a small difference in syntax, but both queries are doing a join on the P_Id fields of the respective tables. In your second example, this is an implicit join, which you are constraining in your WHERE clause to the P_Id fields of both tables. The join is