Questions tagged [c#]

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

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89 views

Searching a database safely using SELECT

I have a site that allows users to search the database for several items. However I am not that good with SQL and I have read that allowing user to type in boxes that then use "SELECT-statements" is ...
3
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2answers
751 views

Table with only a single constant value?

I use C# entity framework code first. My knowledge regarding databases is almost nothing. I don't know if it's common or good practice so I wanted to ask you guys how I should do it. Say I have a ...
0
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1answer
26 views

Performing group by, Order by on a table starting from particular date to recent last date [closed]

Am sorry if this question sounds so dumb, please help. I currently use the below MS SQL query to get the list of volunteers on each date and it works perfectly fine, select Date, count(id) as co ...
4
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1answer
3k views

DROP DATABASE statement cannot be used inside a user transaction

Not really sure if this question belongs here, but I hope someone could help me out. I've made integration tests going all the way down to the database (using mssql localDB). I want each test to run ...
3
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3answers
20k views

SQL Server 2012 - Insufficient memory to continue the execution of the program. (mscorlib)

I have a sql file, which is up to 180 Mb. When I try to open and execute it on Microsoft SQL Server Managment Studio 2012, I am getting this error. . What do do ? I researched on Google. And there ...
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2answers
2k views

Can CLR execution continue after 'THROW' is encountered in T-SQL?

I am calling a T-SQL stored procedure from a CLR stored procedure. and the THROW statement in T-SQL stops the execution of CLR without going into the catch block. Is there something I can change in my ...
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1answer
438 views

Matching separate unicode characters as one

I am writing a C# program, and I'm querying a SQLite database. I have multiple diacritical characters (e.g ã, õ, ó, ê) which I need to match in my search. I have the command "SELECT * FROM ...
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1answer
673 views

C# ASP.net MVC - Which way is more efficient and quicker to store data into database?

I am using Microsoft Visual Studio and C# language to query and store data into my database. I have two ways in which I can store data into my database in SQL server. For example, I need to store ...
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0answers
89 views

What is the difference between Microsoft SQL Server 2008 R2 and MySql Server 5.6 for handling Select ISNULL(MIN(StartDate, '1/1/1900 10:00'))?

I would like to know the difference between Microsoft SQL Server 2008 R2 and MySql Server 5.6 for parsing the following SQL statements. Microsoft SQL Server 2008 R2 SELECT ISNULL(MIN(StartDate),'1/1/...
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2answers
287 views

Encrypted column - limit key access

I'm new to SQL encryption and have a SQL Server 2012 database. The database itself needs to be accessible by DBAs but the data within one of the columns a table should only be viewable in plain text ...
2
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1answer
2k views

Table name starting with @

There is a table in my database that starts with the @ symbol. I am able to query it successfully using the following query: select * from [@tablename] This format works in SSMS and Crystal Reports....
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2answers
2k views

Database Design - Voting System

I'm creating a website in which people can submit there own lists, and then essentially others Up/Down Vote the items within the list. I'd like the list (If the submitter allows "votes") to be ordered ...
0
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1answer
462 views

Could I set my InnoDB MySQL Server session state for SQL_SAFE_UPDATES and INNODB_FLUSH_LOG_AT_TRX_COMMIT?

Could I set my InnoDB MySQL Server session state for SQL_SAFE_UPDATES and INNODB_FLUSH_LOG_AT_TRX_COMMIT using MySQL Workbench's SQL Query window or MySQL Connection Navigator instead of in a c# Mono,...
6
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2answers
605 views

SQL server Database statistics degrading after execution

I have been experiencing timeouts while querying my SQL Server DB in particular one table. I tried updating the statistics and it fixed the performance issues for a couple of days. I started digging ...
1
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1answer
66 views

Database role to allow .NET program to retrieve MSDB table and view rows

I'm currently writing a database management application that connects to all of my databases and returns metadata for each database. The user currently has db_datareader role for MSDB but the ...
2
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1answer
383 views

SQLCLR assembly throws error when multiple queries run simultaneously

I have been using SimMetrics to implement the QGramsDistance search in SQL Server. The SimMetrics is used as a SQL CLR assembly. The search results are promising and everything was well, until of late,...
17
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3answers
1k views

Setting up a central CLR stored procedure / function respository library for internal stored procs in other databases to use?

I would like to use code that I developed in C# CLR to be used in all of the databases on the system so that I don't have to set each to trustworthy and turn CLR on and keep a bunch of the same code ...
2
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1answer
401 views

SMO Copy database or remove all non-system database objects

I have c# SMO script which copy all database objects to existed empty database or to a new database. But this approach has two problems Existed database is not empty, manual intervention is needed. ...
-3
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1answer
960 views

Unable to connect to SQL server 2008 R2 via computer name [closed]

I wrote a program, on my computer it works correctly because SQL Server us running on my computer, but another computer in the network can't use the database. Here is the definition of the connection ...
2
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0answers
132 views

Splitting very large working table

I read the good posts here and here, but my scenario is a bit different, I cannot consider that older data becomes read-only data because any record in my Transactions table can be subject to updates ...
-4
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1answer
5k views

Entity Framework C#: Get rows between two dates [closed]

I have an SQL server database with a column named "Time" of format "datetime". In C# Entity Framework, I want to get all rows whose date is after 8am of today: using (var db = new ...
0
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1answer
57 views

How can I optimize my SQL Query (Multiple Rounds)

I'm try to round the sum of every month for the current und and last year. But with thousands of entries this query is slow. How can I optimize it? I want to use the results in a C# Application. The ...
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1answer
708 views

Derived classes with same base class and class specific ids

I have three classes in my project. One base class and two derived classes. public class Animal { public long Id { get; set; } public DateTime Created { get; set; } public string Name { ...
6
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2answers
1k views

Best Practices for Creating and Deleting Records in MYSQL

I'm fairly new to working with databases, but I've currently have a webCrawler that I've written in C# using MYSQL database. The crawler is frequently writing and deleting records from the database ...
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0answers
72 views

MySQL database hangs but less CPU

I create an application for 30 concurrent users using C# and InnoDB of MySQL (mysql-5.1.35). The size of database is more than 100M lines (~20GB). Most of data is come from 7 active table (2M lines/...
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0answers
352 views

How to create a stored procedure to update database after table edit

In a C# website application with a database, I set a gridView table so that I could edit the values in the table by row, but it appears that I need a stored procedure to do that. Below is the stored ...
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0answers
997 views

Is there a way of implementing a composite primary key with varying fields in MongoDB?

Here is the information about my development environment: -Mongodb 3.0.0 -Microsoft Visual Studio Professional 2013 -.NET Framework 4.5 We are trying to design some MongoDB collections at work ...
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1answer
186 views

Why are writes failing in MongoDB?

Here is the information about my development environment: Microsoft Visual Studio Community 2015 .NET Framework 4.6 ASP.NET MVC assembly System.Web.Mvc Version=5.2.3.0 MongoDB.Driver 2.0.1.27 ...
0
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1answer
686 views

Convert C# logic/lambda's to T-SQL

I am trying to convert the following logic in C# to a SQL Server stored procedure: C# logic // Filter by the search term if the first OR last name is null or empty // || is an 'OR' operator that ...
5
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1answer
2k views

System.Data.Entity.Infrastructure.CommitFailedException: C# Multithreading & SQL Server 2012

We have a C# multi threaded (100 threads) program which reads the records from the DB and each thread picks up one record (one Entity Framework connection per thread) and update the a single DB table. ...
1
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1answer
1k views

SSIS import with header record

I have fixed length text files that I have to import into SQL Server daily. These files contain header records (01) and Detail records (02). I am trying to build an SSIS package to do this. I have a ...
0
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1answer
843 views

Database structure for object with dynamic attributes

I am developing a proof of concept for a personalized email sending web application (like MailChimp, but with premade dynamic templates). The general structure is that I have my templates (different ...
4
votes
3answers
10k views

How to import a varbinary(max) column with bulk import?

I have a varbinary(max) column that I need to bulk import. The data I'm putting into this column is a byte[] in C#. How do I format the data in the comma-delimited file used for bulk import? In ...
0
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3answers
2k views

SSIS - Best way to insert large number of rows

So here's the scenario: I have an XML file, which is in size of 500GB, and with data of around 600 million rows (once on a database table). I'm using SSIS for the operation, and since it consumes a ...
2
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1answer
1k views

SQL Server : create dynamically queries to select all related data in DB based on entry table and ID

I'm tasked to create a SQL statement which will create (and run?) multiple other queries which will select all related data outgoing from an given ID (uniqueidentifier) and a given table name. It ...
5
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1answer
12k views

Select columns dynamically from sql server table

Lets say I have a table that actually store record which looks like Create Table dbo.Info ( SN int primary key identity(1,1), FirstName nvarchar(50) not null, LastName nvarchar(50) not null, ...
0
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1answer
28 views

Slow fill database

The source sends in my program a large number of rows. When the number of rows such as two thousand per minute for one table, all is saved in the database properly. But if you send two thousand per ...
3
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2answers
276 views

CLR/C# equivalent to XACT_STATE()

I am porting a set of T-SQL stored procedures to C#/CLR. In the T-SQL, we use XACT_STATE() to determine if an error requires rolling back to a savepoint or rolling back the transaction entirely. I ...
2
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0answers
419 views

MongoDB C# driver fails to reconnect after stepDown

I have an Elastic Beanstalk environment in AWS that constantly verifies the DB is accessible by querying the mongos for one document. We only speak to the DB routers and not to specific instances. ...
1
vote
1answer
1k views

Log debug messages in a SQL CLR C# Stored Procedure

I have developed a SQL CLR stored procedure in C#, for SQL Server 2012. I want to log messages to SQL Server registers. On a normal stored procedure I use xp_logevent What can I use to log a message ...
8
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3answers
6k views

How to insert a large amount of records to the database in a short time?

I have to insert a bunch of records(500,000) to the database at once, using the fastest way. I've tried inserting 1,700 records at once but it took twenty minutes!! I am using SQL-SERVER, and C#. ...
1
vote
1answer
5k views

How to use HTTP Connection Manager in Script Component? (Not Script Task)

I'm trying to perform the same scenario as in the following link; Create a SSIS Script Component as a Data Source that uses a pre-existing HTTP Connection Manager to retreive a page with GET and emit ...
1
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2answers
8k views

Naming The SSRS Report Name based on the Parameters Passed

I want to save my SSRS Report Based on the Parameters Passed. i.e. Am passing P1 And P2 as parameters so I want my SSRS Report name as P1_P2_ReportName.Xtension. Any suggestions?
1
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1answer
11k views

Put Postgres query result in array

How can I put an sql query result in a string array with Postgres? I have some attributes in the column 'zone' of the table 'mytable' and I must put them all in a String[] areas; This is my first ...
0
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0answers
4k views

SQL Server pre-login handshake error

I am working on a system where sometimes request/sec increase up to 680. It's a .NET 4.0 web api. In normal situations when requests are fewer, everything is fine, but sometimes when the number goes ...
1
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2answers
991 views

Dropping person while their connection sleeping in SQL Server

I have a C# application that communicates with SQL Server. When I try to drop a user that recently had a connection with SQL Server, it gives me an error that I can't delete them because they have ...
3
votes
2answers
4k views

Searching multiple tables in SQL

This question will involve some C# code but I hope that is fine, in the end it is the SQL that is the issue. (To see short question look at end of post) So I have a site, where you can add a site in ...
0
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1answer
2k views

MySQL Data Synchronisation from different Databases in C#

I am supposed to create a C# solution to compare the data (table, column and row) from two different databases and update the 2nd one as follows: 1. with just the rows that are updated recently (...
3
votes
2answers
10k views

How to re-declare T-SQL variables if it already exist?

Background: I'm building a SQL command to be executed on the server which involves a lot of accessing store procedure and declaring variables which are used as input to other stored procedures. This ...
3
votes
1answer
377 views

I can backup my SQL Server 2008 R2 but can't restore from the very same folder

I ran a backup into a folder. The Network Service has full control access to this folder. The backup process didn't work until I granted that account full control. I try to restore that same file but ...