I am currently trying to check a checkbox dependent of the SQL data after selecting the row in a datagridview. I have gotten this to display text with TexBoxes, but cannot get it to check a check box. Yes = True No = False Any recommendations, would be very much appreciated. The table being displayed is bound…
Why does this suggested solution prefer a different way of calculating percentages based on aggregations?
I’m working through a problem set from CMU’s public db systems course. I have the following two tables: Order Id CustomerId EmployeeId OrderDate RequiredDate ShippedDate ShipVia Freight ShipName ShipAddress ShipCity ShipRegion ShipPostalCode ShipCountry 10248 VINET 5 2012-07-04 2012-08-01 2012-07-…
Checking if two values in Query are the same, makes Query very slow
My Goal: A Query, which provides all provinces, in which a building is constructing. My Problem: As soon as I make sure that every building is compared to the same building (comparing upgrade_id) the Query takes forever. Without the last part of the where statement it takes 1 sec, which is totally fine. Table…
What constrain to use when trying to have one type of something (ex.bank account) for each ID?
I currently have a ACCOUNTS table with account_id attribute as primary key, cookie_type_id as foreign key, and client_id as a foreign key. When trying to make sure that each client_id has no overlap in cookie_type_id (one client cannot make 2 chocolate cookies), should I be using UNIQUE contrain on foreign ke…
MySQL Select Count of Duplicate Value In Relation Table
I have 3 tables: foods, order_detail, and orders Here are the records for table foods: Here are the records for table order_detail: And here are the records for orders table: I want to show count order detail grouped by food type. I expected this result: Here is my approach, but it still doesn’t show th…
Why is the else condition triggered when the when condition is fulfilled?
I take a number for customer type and a string for currency from the user and return the current row. If the currency entered by the user is not available in the table then I should return the row in which the currency value is ‘all’. And if the currency entered by the user exists in the table, I …
How do I take user inputs in CASE statements in SQL?
This is the query I’m trying to execute in SQL Developer, but I get an error: Error at Command Line : 2 Column : 7 Error report – SQL Error: ORA-00904: “INPUT”: invalid identifier 00904. 00000 – “%s: invalid identifier” Can anyone help me out? Answer As Alex commented…
Looking for an explanation of this attempted SQL injection query
Looking through my logs I found the following query string as an attempt to perform a SQL injection, probably from an automated tool: From what I can tell, it’s attempting a timing based attack to see if any of the tables in my database start with “a” – the sleep function will only run if the union quer…
SQL query to fetch all Auctions for whom a particular user has not submitted a Bid
I am working on a project where I want to fetch from my postgres database all the auctions where a particular user has not submitted any bid for the auctions. I am trying to write the query for this. The schema is as follows – Auction Table auction_id (PK) auction_data A1 a1_data A2 a2_data A3 a3_data B…
How to persist SQL Server system table records?
I am running a query that returns the last execution time for a stored procedure: I am getting the correct results, but if I run the query again in around 30 seconds, I don’t get any results. Is there a setting or command I need to set or add to persist the results? My goal is to find out what