KeyError: column not found in DataFrame
In Pandas, a KeyError: column not found in DataFrame occurs when you try to access a column that does not exist in a DataFrame. This error commonly happens due to:….
Tag: Debugging
Not Handling Exceptions Properly in Python
Exception handling is crucial in Python programming to prevent unexpected crashes. Without proper handling, errors like division by zero, file not found, or invalid input can stop execution abruptly. In….
System.Data.SqlClient.SqlException – Violation of PRIMARY KEY constraint
The System.Data.SqlClient.SqlException – Violation of PRIMARY KEY constraint is a runtime exception in C# that occurs when the application tries to insert or update a row in a SQL Server….
System.Data.SqlClient.SqlException – Cannot find column ‘xyz’
The System.Data.SqlClient.SqlException – Cannot find column ‘xyz’ is a runtime exception in C# that occurs when the application tries to access a column in a SQL Server database that does….
System.Data.SqlClient.SqlException – Cannot insert the value NULL into column ‘xyz’
The System.Data.SqlClient.SqlException – Cannot insert the value NULL into column ‘xyz’ is a runtime exception in C# that occurs when the application tries to insert or update a row in….
System.Data.SqlClient.SqlException – String or binary data would be truncated
The System.Data.SqlClient.SqlException – String or binary data would be truncated is a runtime exception in C# that occurs when the application tries to insert or update data in a SQL….
Microsoft.EntityFrameworkCore.DbUpdateException – An error occurred while updating the entries
The Microsoft.EntityFrameworkCore.DbUpdateException – An error occurred while updating the entries is a runtime exception in C# that occurs when Entity Framework Core encounters an error while saving changes to the….
System.InvalidOperationException – The model backing the ‘xyz’ context has changed
The System.InvalidOperationException – The model backing the ‘xyz’ context has changed is a runtime exception in C# that occurs when the database schema does not match the Entity Framework model…..
System.Data.SqlClient.SqlException – Invalid object name ‘xyz’
The System.Data.SqlClient.SqlException – Invalid object name ‘xyz’ is a runtime exception in C# that occurs when the application tries to access a database object (e.g., table, view, stored procedure) that….
System.Security.SecurityException – Request for permission failed
The System.Security.SecurityException – Request for permission failed is a runtime exception in C# that occurs when the application tries to perform an operation that requires specific permissions, but the necessary….