This is my sample data CREATE TABLE customer1 ( rating int(9), genre varchar(100), title varchar(100) ); INSERT INTO customer1 (rating, genre, title) VALUES (2, ‘A’, ‘abc’), (4, ‘A’, ‘…
Tag: subquery
MySQL multiple columns in ALL clause [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 1 year ago. Improve this question Why it is not allowed to do the following? But it is possible to do Answer Assuming that this…
How can you assign a value to a variable if mysql does not yield any result?
There are two databases. I am trying to see if email in the first database is also present in the second database. Here’s the code that I’ve tried: The output is: The type for onera and julian is blank because there email is not present in the phpbb_users database. How can I avoid this blank space…
Oracle SQL Subquery – Usage of NOT EXISTS
I used a query to find a list of Primary Keys. One Primary key per each ForiegnKey in a table by using below query. Let us say this is the result : 1,4,5 NOw I have another table – Table B that has list of all Primary keys. It has 1,2,3,6,7,8,9 I want a write a query using the above
How to speed up sql query execution?
The task is to execute the sql query: select * from x where user in (select user from x where id = ‘1’) The subquery contains about 1000 id so it takes a long time. Maybe this question was already …
Wrong syntax for OVER and PARTITION in MySQL syntax
SELECT Id, Price, CustomerId, ROW_NUMBER() OVER (PARTITION BY CustomerId) FROM Orders; I get the error “Syntax error: Unexpected ‘(‘ (opening parenthesis) Does MySQL not support this? I’m pretty …
How can I pull out the second highest product usage from a SQL Server table?
We have a product usage table for software. It has 4 fields, [product name], [usage month], [users] and [Country]. We must report the data by Country and Product Name for licensing purposes. Our rule …
PostgreSQL: Sub-Query on one table
My table looks (simplified) like this: It records filenames “File”; sometimes, a file (here BBB) is replaced by a newer one (here CCC”. First show all records, that have been replaced: OK, brings up line 2. Now I need to add a subquery column QQ, which shows the File of the substitute record…
Convert multiple self JOINs to window function or subqueries (SQL)
I have a query with several self joins: Here is a sample table where in yellow I marked the record that is within the boundaries of the where condition: Here is the expected result view: Basically I filter one table with several consecutive conditions and show the result as a table. Is there a way, using wind…
How to pull the count of occurences from 2 SQL tables
I am using python on a SQlite3 DB i created. I have the DB created and currently just using command line to try and get the sql statement correct. I have 2 tables. When I setup table two, I added this statement in the creation of my messages table, but I have no clue what, if anything, it does: What