Questions tagged [c#]

C# is a general-purpose, managed, garbage-collected, object-oriented programming language created by Microsoft.

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SQL Server: Stored Procedure to add and update parent & child records

I understand how to use Table-Valued Parameters to pass a set of InvoiceItems to a procedure that will insert a new Invoice and also insert the InvoiceItems to the InvoiceItems table. from this Stack ...
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29 views

SQLite database Upgrade Schema without loosing data

I have a small C# WindowsForms application. It uses SQLite DB in the client PC. I started with a Schema DB and with the time I added more tables and columns. To my local DB(not the client) I want to ...
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1 vote
1 answer
17 views

Update column with variable

Employee table ID EmployeeSRN Name SupervisorID 1 10101 Akash 2 2 10111 Smeeta 4 3 10201 samir 5 I want to update SupervisorID of Akash to Samir's ID, i.e. 3. In my C# function, the only ...
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2 answers
52 views

User handling in MS-SQL database

I have an MS-SQL installation, controlling different databases. This can be accessed using Microsoft SQL Server Management Studio 18. For doing that, I use Windows authentication. In there, I have ...
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1 vote
1 answer
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Does SQL Server 2019 automatically un-compress data when it is queried by an application? [duplicate]

We are using SQL Server Express 2019 and have inevitably ran into the 15GB cap. I now have to figure out a way to quickly compress data since we cannot buy a license at the moment. At the moment it is ...
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0 votes
1 answer
57 views

Having issues for calling a sp multiple times per second async? [closed]

Here is my scenario, I have a windows service that monitors queues of data for messages. If this services finds a message on the queue it will grab it, do a little work then send it to a wcf ...
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18 views

I need to store large amounts of data in terms of time and source as dimensions. How should I design my database?

My project needs to save a large amount of historical data from sensors, and the number of them is large. Although we have eliminated part of the data by the anti-jitter and anti-duplication, but ...
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0 votes
0 answers
19 views

How to do archiving in a Winforms C# Project with MySQL database?

So I have a C# Winforms Project with MySQL as the backend. I'm wondering how to do archiving on my records. Is it done by inserting records from the active table to an archive table and deleting the ...
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2 votes
1 answer
70 views

Executing sql linked server procedures through python

I am getting an error when trying to execute SQL Server system procedures such as sp_addLinkedServer and sp_dropserver etc from python script USE [master] EXEC master.dbo.sp_dropserver @...
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  • 21
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1 answer
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'You cannot add or change a record because a related record is required in table 'Booking'.' error when removing a PKFK value in a SQL database in C#

System.Data.OleDb.OleDbException: 'You cannot add or change a record because a related record is required in table 'Booking'.' My sub-routine to get rid of the booking with a given BookingID in the ...
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0 votes
1 answer
490 views

Exception when calling Postgresql function returning a local numeric from C#

I wrote a Postgresql function to insert a row and return the value generated from the identity column. I receive the following exception when trying to call it from C#. Npgsql.PostgresException: '...
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2 votes
2 answers
441 views

SMO : The login already has an account under a different user name, when calling TransferData()

I need to implement the following requirement. I have setup a remote sql server express, certain users shall be able to create databases on remote server and assign other users to have access on it (...
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-1 votes
1 answer
53 views

Is there any possibility to use SMO objects to copy a database from MS SQL Server 2014 Express (server address) to localhost?

I need to implement in c# a functionality for copying a certain database from server address to localhost (I'm aware of the backup/restore option - I have this implemented when I want to export and ...
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0 votes
2 answers
253 views

Update via C# EF Core or SQL

Our work involves updating products, we have a large table of products, and the prices and other pertinent information gets updated hourly. Let’s say it’s an amazon store, and we are talking of amazon ...
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1 vote
1 answer
150 views

how to scaffold the database triggers [closed]

I'm trying to find a way to include table triggers when reverse-engineering the database. but I can't seem to find a way to do it. I'm using SQLserver and .netCore 3.1 with efcore. and each time I ...
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-1 votes
1 answer
64 views

Long Running Query Optimization

I need to optimize this query as this query is taking minutes of time in execution. Below is the query. i'm giving date parameters and shift id is optional. as query is returning same in and out from ...
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6 votes
1 answer
393 views

How to return several arrays of doubles as a table in C# SQLCLR function

What I have is a CLR SqlFunction that produces 3 arrays of doubles. I would like this function to return something appropriate so that the FillRowMethod can output it for me as a table in T-SQL. It ...
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  • 249
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5 answers
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How to write search query to retrevie the rows with biggest DateTime <= 2010102248 in SQL

I am creating a table and now trying to create my first Search Query. I have created the table successfully like this: CREATE TABLE testTable ( DateTime INT NOT NULL, /*yyyyddhhmm, ...
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  • 45
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1 answer
28 views

Conditional multi table insert

My application parses a web resource for data constantly. The data is then used to build a domain object. The domain object is represented in my database across several tables. The domain object is ...
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  • 113
0 votes
1 answer
145 views

First-In and Last-Out times for Night Shift and Day Shift Employees

Kindly share suitable technique to handle night shift as well as day shift. Below are the shifts, Night, 2020-07-20 17:00 to 2020-07-21 02:00 Night, 2020-07-20 17:00 to 2020-07-21 02:00 Day, 2020-...
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1 vote
1 answer
192 views

Upserting 50K records into big table (app. 350 columns) in postgresql

Using C# I'm trying to upsert from csv file (~ 55000 records) to a postgresql table with 350 columns. I'm just building the upsert statements from header and record which are comma separated. Like ...
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0 votes
0 answers
193 views

Sql service broker and SqlDependency

I have a system where my TCP/IP command prompt application receive data and insert that data in [database1].[mytable]. Now I want to move that data from [database1].[mytable] to [database2].[...
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  • 101
2 votes
0 answers
41 views

Modeling Device Relationships

At currently I am designing an inventory system for internal use and I have come across an interesting scenario when adding tables for creating the devices. Currently I have tables for Device, ...
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  • 349
0 votes
1 answer
21 views

i have error in query [closed]

i am not getting what is the issue in the query probably i am not following the correct way to put the string and char sign , i am inserting the data in c# to local host with where clause please check ...
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0 votes
1 answer
62 views

Login failed for newly created user

I just created my first database yesterday. It is now set up and I can write to it from my C# application using the admin user login. I would now like to use a limited write only user so my admin ...
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5 votes
1 answer
371 views

System.Web in SQL Server CLR Function

I have done some light research into this topic and I would like to know what are all the pro's and con's or enabling/registering this particular .dll within SQL Server? Back information - we are ...
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1 vote
1 answer
304 views

Should I move ORDER BY to app?

I noticed this discussion on NOT using ORDER BY in SQL query unless really necessary. https://www.brentozar.com/archive/2019/10/how-to-think-like-the-sql-server-engine-adding-an-order-by/amp/ The ...
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  • 335
1 vote
0 answers
564 views

What would be an appropiate BatchSize for bulk insert 34 GB of data (JSON files) into SQL Azure?

I got like 25,000 JSON files whose size (in average) is 1.2 MB (also, the average of records per JSON is 5,000), and the total size is like 34 GB. I have been reviewed the BCP utility from SQL Server, ...
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0 votes
1 answer
420 views

Efficiently get first 10 results and total number of results

For a search page, I need the first 10 results and the total number of results of a query. That part is easy: SELECT TOP(10) ... FROM ... WHERE ... ORDER BY ... SELECT COUNT(*) FROM ... WHERE ... ...
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0 votes
1 answer
390 views

End of file reached. Error 38 in SQL. Passes verification checks

Having issues restoring a database in SSMS, error 38. The databases are transferred up to google via their Drive API. Download it on my side and has error. If I transfer it through teamviewer ...
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1 vote
1 answer
749 views

Facing permission error while trying to execute a stored procedure published through CLR

I've created a stored procedure using SQL CLR c# stored procedure in Visual Studio 2017 and I've published it in MSSQL Server. Now I can see my stored procedure, but I face this error when I want to ...
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1 vote
1 answer
403 views

This failure occured while attempting to connect to the Principle server

One of our clients recently came to us with a problem he's facing while working with our application. The error in the log file is the next: System.Data.SqlClient.SqlException (0x80131904): Timeout ...
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-2 votes
1 answer
444 views

How to group by linq based on input parameter? [closed]

I want to use group by in C#, and my result must be like this code in SQL: SELECT MAX(EffectiveDate) AS EffectiveDate,details.PersonnelBaseID FROM dbo.tkp_PersonnelDetails AS details where details....
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  • 99
0 votes
1 answer
84 views

Use table in database like in excel [closed]

I'm writing a program for my client in C# Winform. And the client gave this excel sheet. Process I have a table that used to calculate BULK amount of alcohol by "DIP" and "SLIDE". In excel I need ...
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0 votes
0 answers
144 views

Configure MSLocalDB in a .NET config file

I have created a .NET Standard C# project and a SQL database in my LocalDB server (LocalDb)\MSSQLLocalDB. I have tried to configure the connection string in the project web configuration file but in ...
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0 votes
1 answer
62 views

How do you combine the input of three parameters into one?

I'm working on a query that will run via C# to SQL server. I'm trying to make the query flexible and provide parameters for all the inputs. Here is the query: SELECT Test_Matrix.tblTestMatrix....
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0 votes
0 answers
2k views

How can I figure out the root cause of "Out of range value for column" error in MySQL

I have a console app written with C# on the top of .Net Core 2.2 framework with EntityFrameworkCore as ORM. My application runs various tasks that run every 15 minutes. Each task calls an external API ...
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  • 101
0 votes
0 answers
245 views

Database design for multilingual tags

I'm looking for a simple database design for tags, where the tag-label can be translated (multilingual). I'm currently looking at Toxi, which is a very simple and clean way of creating a tagging ...
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  • 259
2 votes
1 answer
242 views

Bind dll in SQL Server

I have a little side project at my work. My task is to deploy some SQLCLR code into our dev-database (SQL Server 2017) to test it. If the tests are successfull, we want to develop triggers and ...
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0 votes
1 answer
482 views

Conditional insert vs UNIQUE constraint

https://stackoverflow.com/questions/4069718/postgres-insert-if-does-not-exist-already I would like to check if something exists before inserting it, what should I rely on? UNIQUE constraint or ...
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  • 209
3 votes
1 answer
1k views

Error publishing SQLCLR C# Function using Visual Studio 2017

I'm trying to (learn) publish a SQLCLR function using Visual Studio 2017. (It's a simple function that sends an email.) As a reference I used this articles on CodeProject and MSSQLTips: Create, Run, ...
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-2 votes
1 answer
115 views

How Can i Parse the sms text to textboxes [closed]

how can can i do this ? i can't get the return value and i can understand how regex work . string value = "+CMT:"+639231568462"," ","18/10/07,14:31:32+32" HELLO" "; Regex r = new Regex(""); ...
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0 votes
1 answer
733 views

Check if master is up from slave server(replication) postgresql

I want to check whether my master server is up by querying from slave server ? Is there any view or command ?
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1 vote
2 answers
491 views

Saving SSIS package from server to local computer

Right now I'm able to upload an SSIS package from my local computer to SQL Server with my C# program: Microsoft.SqlServer.Dts.Runtime.Application app; app = new Microsoft.SqlServer.Dts.Runtime....
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  • 197
0 votes
1 answer
72 views

unable to add data to table because related record is required

I have an access database with my work that I am trying to insert into but I keep getting. 'You cannot add or change a record because a related record is required in table 'Projects'.' I'm running ...
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3 votes
2 answers
38k views

Before and After update trigger on same table

I have a table with 4 columns qty, qtydiff, price and value. I want a after update trigger that fires when qty row values change (more than one rows). The Before trigger should read and store the ...
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1 vote
0 answers
100 views

increment row and calculate amount - follow up question

This is a follow up to my original question, but anyone can answer nonetheless. Increment each row according to condition in SQL C# WITH upd AS ( SELECT [Bill No], Item_Name, ...
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0 votes
1 answer
792 views

How to ensure that row with same PK inserted replaces old row in MS SQL Server, instead of throwing exception of PK Violation?

I'm transferring bulk data from a C# DataTable into a SQL Server DB. The DataTable provides values for all 26 columns except the first column, which is an auto-incremental ID The schema skeleton is as ...
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1 vote
0 answers
2k views

Oracle Number (10, 0) decimal in (C#) code

The following query is executed to add a new column to an existing table: ALTER TABLE TABLE1 ADD COLUMN1 NUMBER(10, 0) DEFAULT -1 NOT NULL. Using DBForge to check the database, result in NUMBER (10, ...
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  • 113
1 vote
2 answers
63 views

How to provide a SQL Server database with a C# application [closed]

I am working on a C# application which depends on a few SQL Server databases. Now, in my development environment, I am using SSMS (SQL Server Management Studio) to create and manage my databases. My ...
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