Any column that is not modified retains its original values, except in certain queries using the CASE expression. See CASE expression for a description of CASE expressions. To add, drop, or modify a ...

Use CASE instead of UPDATE for conditional column updates Something else developers do a lot is using UPDATE ... WHERE to set the value of one column based on the value of another column, e.g ...

Practical .NET Retrieve and Update Entity Framework with Dynamic Queries You don't have to give up on creating dynamic queries just because you're using Entity Framework. Entity SQL and ObjectQuery ...