HTTP 409 – Conflict
The HTTP 409 Conflict status code indicates that the request conflicts with the current state of the server or resource. This typically occurs when the client attempts to perform an….
Category: SQL
System.Data.SqlClient.SqlException – Column ‘xyz’ cannot be null
The error System.Data.SqlClient.SqlException – Column ‘xyz’ cannot be null occurs when you attempt to insert or update a record in a SQL Server table, but the column xyz does not….
EntityFrameworkCore.DbUpdateException – Violation of foreign key constraint
The error EntityFrameworkCore.DbUpdateException – Violation of foreign key constraint occurs in Entity Framework Core (EF Core) when an operation violates a foreign key constraint in the database. This typically happens….
System.Data.SqlClient.SqlException – Operand type clash
The error System.Data.SqlClient.SqlException – Operand type clash occurs in SQL Server when there is a mismatch between the data types of operands in an operation or comparison. This typically happens….
EntityFrameworkCore.DbUpdateConcurrencyException – Database operation expected to affect n rows
The error EntityFrameworkCore.DbUpdateConcurrencyException – Database operation expected to affect n rows occurs in Entity Framework Core (EF Core) when a concurrency conflict is detected during a database update operation. This….
Microsoft.Data.SqlClient.SqlException – Timeout expired
The error Microsoft.Data.SqlClient.SqlException – Timeout expired occurs when a SQL query or operation takes longer to execute than the allowed time limit. This can happen due to various reasons, such….
System.Data.SqlClient.SqlException – Cannot convert nvarchar to int
The error System.Data.SqlClient.SqlException – Cannot convert nvarchar to int occurs when SQL Server attempts to implicitly or explicitly convert a string (NVARCHAR) value to an integer (INT) but fails because….
System.Data.SqlClient.SqlException – Incorrect syntax near ‘xyz’
The error System.Data.SqlClient.SqlException – Incorrect syntax near ‘xyz’ occurs when SQL Server encounters a syntax error in your SQL query. The xyz represents the part of the query where the….
System.Data.SqlClient.SqlException – Invalid column name ‘xyz’
The error System.Data.SqlClient.SqlException – Invalid column name ‘xyz’ occurs when SQL Server cannot find a column with the name xyz in the table or view specified in your query. This….
System.Data.SqlClient.SqlException – Cannot insert explicit value for identity column
The error System.Data.SqlClient.SqlException – Cannot insert explicit value for identity column occurs when you try to explicitly insert a value into a column that is defined as an IDENTITY column….