I am working on the currency table. I need to get every Friday for the last six months. My query selects every day between two dates. Here my query OUTPUT OUTPUT(Should be) Thanks for helping. Answer Not clear if you are looking for Oracle or MS SQL-Server. In case you need it for Oracle you can use
Query for students passed or not passed in specific Subjects [closed]
I have a Table with Column Headings: ID Student_Name Roll_Number Subject1MarksObtained Subject1TotalMarks Subject2MarksObtained Subject2TotalMarks Subject3MarksObtained Subject3TotalMarks …
Using SQL Server Always Encrypted feature in stored procedure
I am using SQL Server Always Encrypted feature of Azure SQL with .NET code. While it works like charm inside Entity Framework where the data can be decrypted, not sure how do I use it in stored procedures? Let’s say I have a column called Department Id and I have encrypted the same using Always Encrypte…
Oracle: How to change column data type from VARCHAR to NUMBER without losing data
I have the following columns in my table: ID – NUMBER(10,0) NUMBER – VARCHAR(255) All data in the NUMBER column are numbers. I would like to change the VARCHAR type to Integer Number type. How to do it without data loss? Answer Oracle does not allow modification of data type of the column if it is…
Ruby Foreign Key Constraints in Database vs Model
I have the following models in a Rails app. This setup has worked fine since normally when I would like to add a new VendorPromo to a vendor, there’s a dropdown in the view of available Promos to choose from. Now, I’m enabling the creation of new VendorPromos via an API. However, this current set …
Select the oldest date for a row and create a new column with values based on the oldest date or other
Firstly to explain what the select is doing currently. Select reference, status, Valid, createDate, createdBy FROM ( select 1 as value, ‘reference’ reference, ‘status’ status, ‘Valid’ Valid, ‘…
Subquery returns more than 1 rows
This is a beginner of coding trying to figure out how query works. Right now I’m trying to select a specific column of several different rows from mysql and display them at the same row on C#, …
TSQL – Conditionally “Cross Join” Records
Code (staging sample data): Detail: @LookupTab is basically a filter that will have either 0, 1, or both values (111 – Option 1 and 112 – Option 2). @DataTab is the actual data in the table (can be huge). The Val field in this table can either be 111 (Option 1), 112 (Option 2), or 223 (Both Option…
DATEDIFF vs (w1.date = w2.date +1) difference? MySQL syntax
I was working on a SQL database question using MySQL. The goal is to find all IDs that satisfy today is warmer than yesterday. I’ll show you my original code, which passed 2 out of 3 test cases and then a revised code which satisfies all 3. What is the functional difference between these two? Is it a My…
Add missing monthly rows
I would like to list the missing date between two dates in a request for example My data : YEAR_MONTH | AMOUNT 202001 | 500 202001 | 600 201912 | 100 201910 | 200 201910 | …