database-connectivity

MongoParseError: Invalid connection string

由 半腔热情 提交于 2020-08-24 10:24:17
问题 I am trying to connect MongoDB database with this code but when running it I get the error (see the error below after the code). The initial error was in the line where it was resolved by adding useNewUrlParser: true but even after this I still get more errors. I am using MongoDB version 4.0.1. Does anybody know how to resolve this error? mongoose.connect('User://localhost:27017/User',{ useNewUrlParser: true }) Error while running this code: (node:11068) UnhandledPromiseRejectionWarning:

MongoParseError: Invalid connection string

由 帅比萌擦擦* 提交于 2020-08-24 10:22:27
问题 I am trying to connect MongoDB database with this code but when running it I get the error (see the error below after the code). The initial error was in the line where it was resolved by adding useNewUrlParser: true but even after this I still get more errors. I am using MongoDB version 4.0.1. Does anybody know how to resolve this error? mongoose.connect('User://localhost:27017/User',{ useNewUrlParser: true }) Error while running this code: (node:11068) UnhandledPromiseRejectionWarning:

MongoParseError: Invalid connection string

由 时间秒杀一切 提交于 2020-08-24 10:22:16
问题 I am trying to connect MongoDB database with this code but when running it I get the error (see the error below after the code). The initial error was in the line where it was resolved by adding useNewUrlParser: true but even after this I still get more errors. I am using MongoDB version 4.0.1. Does anybody know how to resolve this error? mongoose.connect('User://localhost:27017/User',{ useNewUrlParser: true }) Error while running this code: (node:11068) UnhandledPromiseRejectionWarning:

Query regarding database connectivity in db4o

由 荒凉一梦 提交于 2019-12-25 08:58:04
问题 I'm creating a db4o object (namely Customer.yap) and if it is already created i just insert new objects into the existing object (namely Customer.yap) . For both these operations i'm just using: IObjectContainer db1 = Db4oEmbedded.OpenFile(Db4oEmbedded.NewConfiguration(),@"C:\Users\admin\Desktop\Db4oObjectFiles\Components.yap"); try { db1.Store(comp1); } finally { db1.Close(); } Am i doing it right or is there a separate command to check if the object exists and then insert values or can i

Query SQL From Excel 2007 And Return Several Values

由 本小妞迷上赌 提交于 2019-12-21 06:03:40
问题 I'm attempting to take a small amount of data, about 200 fields in Excel and retreive data from SQL with that field in the where clause for each item. TABLE: ID Name Phone 1 Test1 1234 2 Test2 1235 3 Test3 1236 Excel: Date ID 2/1/11 1 2/1/11 2 2/1/11 3 I want to be able to retrieve, within excel (hopefully without writing any additional code per se - maybe a simply Excel ODBC or SQL connection with a query. So my data would end up as such on the Excel Document: Excel: Date ID Name Phone 2/1

Update/Edit entered data from database - servlet

由 蹲街弑〆低调 提交于 2019-12-20 07:51:15
问题 I have prepared a form for inserting, viewing and deleting data and now I want to add option to edit that data but either I am following wrong way to do it or I dont know how to do that. So can any one help me proceeding to edit the entered data ?? Should I give reference to old html page to edit or new page or .. ?? I know I haven't followed MVC structure but I wanted to do whole coding in single page so waiting for help.. Thank you. These are my codes. Datastore.html <html> <head> <title

What's the best way to test SQL Server connection programmatically?

由 强颜欢笑 提交于 2019-12-17 08:52:32
问题 I need to develop a single routine that will be fired each 5 minutes to check if a list of SQL Servers (10 to 12) are up and running. I can try to obtain a simple query in each one of the servers but this means that I have to create a table, view or stored procedure in every server, even if I use any already made SP I need to have a registered user in each server too. The servers are not in the same physical location so having those requirements would be a complex task. Is there a way to

QT MySql connectivity using Windows XP, Qt Creator 4.5.2(windows 32 bit)

由 风格不统一 提交于 2019-11-29 15:11:07
Platform: Windows XP, Qt Creator Ide 4.5.2 MySql is setup here as well. I want to establish database connection with Qt and mysql. The line QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL"); generates error like below: QSqlDatabase: QMYSQL driver not loaded QSqlDatabase: available drivers: QSQLITE QODBC3 QODBC It seems QMYSQL driver is absent here. What to do ? I recommend reading the following excellent guide: http://christopher.rasch-olsen.no/2009/04/14/qt-45-and-mysql-plugin-with-mingw-on-windows-xp/ (with comments) - it helped me to solve exactly the same problem. You need to build the

QT MySql connectivity using Windows XP, Qt Creator 4.5.2(windows 32 bit)

由 孤者浪人 提交于 2019-11-28 09:00:50
问题 Platform: Windows XP, Qt Creator Ide 4.5.2 MySql is setup here as well. I want to establish database connection with Qt and mysql. The line QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL"); generates error like below: QSqlDatabase: QMYSQL driver not loaded QSqlDatabase: available drivers: QSQLITE QODBC3 QODBC It seems QMYSQL driver is absent here. What to do ? 回答1: I recommend reading the following excellent guide: http://christopher.rasch-olsen.no/2009/04/14/qt-45-and-mysql-plugin-with

What's the best way to test SQL Server connection programmatically?

由 雨燕双飞 提交于 2019-11-27 18:26:53
I need to develop a single routine that will be fired each 5 minutes to check if a list of SQL Servers (10 to 12) are up and running. I can try to obtain a simple query in each one of the servers but this means that I have to create a table, view or stored procedure in every server, even if I use any already made SP I need to have a registered user in each server too. The servers are not in the same physical location so having those requirements would be a complex task. Is there a way to simply "ping" from C# one SQL Server? Thanks in advance! Execute SELECT 1 and check if ExecuteScalar
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