In PostgreSQL when I run the command DROP VIEW IF EXISTS view_name; I get the response: View IF dropped. Can anyone explain what this means? why the word ‘IF’ instead of a response like: View …
Gaps And Islands: Splitting Islands Based On External Table
My scenario started off similar to a Island and Gaps problem, where I needed to find consecutive days of work. My current SQL query answers “ProductA was produced at LocationA from DateA through DateB,…
For JDBC prepared statements, how are the position of variables determined when an actual value is supplied in the SQL statement
If I have the following code, with one value supplied in the SQL statement, what would be the value of the position for GROUP? Is it 2 or 3? In other words, is the supplied value counted when …
SQL Query to group opening balance value
I am relatively new to SQL queries, and Stack Overflow has previously pointed me in the right direction, either by reading other peoples issues or answering my specific question. But this one I can …
How to design entity tables for entities with multiple names
I want to create a table structure to store customers and I am facing a challenge: for each customer I can have multiple names, one being the primary one and the others being the alternative names. …
Select all subscriptions whose users don’t have any other active subscription
I am writing a subscription cleanup query that should select all canceled subscriptions, whose users don’t have any other active subscription (the application allows multiple subscriptions per user). …
Perform SQL statement after each DELETE
Is there a way to make jOOQ perform a SQL statement (in my case a CHECKPOINT) after each DELETE? Ideally there would also be a way to specify the tables that this happens for. The RDBMS I’m using (…
value from database not appearing into php
i have created a cart website using sql, html and php. the cart button is as below: <input type="hidden" value="' . $product['…
Adding new column to existing table with default value
Suppose I have a table called SerialNumbers which has columns: Id (int) SerialNumber (nvarchar) IsValid (bit) ToBeUsedBy (DateTime) Currently this table is being used by numerous different …
Query to check relationships between columns?
I currently have a table called User_Followers this table has the following columns: User_Id Follower_Id I’m trying to build a query that will retrieve all the people a user is following but no …