First, is this the correct json? Do I need to specify the ProviderName? "ConnectionStrings": { "DefaultConnection": { "ConnectionString": "Data Source=(local);Initial Catalog=MyDB;Integrated Security=SSPI;", "ProviderName": "System.Data.SqlClient" } } Second, the Program.cs file created by Visual Studio doesn't seem to have anywhere to…
I created a utility class to handle database connections using JDBC. I get the error below in another class, performing actions such as displaying the values from the database: "Cannot invoke "java.sql.Connection.prepareStatement(String)" because "Utils.connection" is null" I have another class…
I want to create a simple cassandra db , insert some data and print all the data in the vector db This is the structure of my exercise: /cassandra_study ├── docker-compose.yml ├── Dockerfile └── app.py And that are code of…
I'm currently developing a flask web application in pycharm. The app itself works properly but when I tried using MongoDB to store and collect user ids for "log in and register" purpose, it keeps throwing me this error- AttributeError: 'NoneType'…
I am trying to connect to an Azure Synapse database through python code. I already have access to the database itself and can run queries using Azure Data Studio. However, the database connection fails specifying: Error: ('HY000', '[HY000] [Microsoft][ODBC Driver…
I recently used pgx library and it suggested to use connection pool over creating connection on demand during concurrency. The *pgx.Conn returned by pgx.Connect() represents a single connection and is not concurrency safe Are below reasons adequate to support the…
I used an URI in .env to connect my code to the database of my app, but it connected to the postgres database instead of the database "workout-app" and I don't know how to fix that. My application created tables…
I've created a free tier MongoDB cluster, and I'm getting this message from MongoDB: You are receiving this alert email because connections to your cluster(s) have exceeded 500, and is nearing the connection limit for the M0 cluster HSDevCluster in…
const mongoose = require("mongoose") mongoose.connect("mongodb://localhost:27017/testdb") const userSchema = new mongoose.Schema({ name : String, age : Number }) const User = mongoose.model("User", userSchema); const user1 = new User({name: "Jack", age: 24}); user1.save().then(() => console.log("User Saved")); I was trying to perform CRUD…
I'm encountering a persistent issue with PostgreSQL where I repeatedly face the error message: could not connect to server: Connection refused Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432? This issue occurs intermittently…