Update with case statement in sql

Problem

While writing T-SQL code, sometimes it is necessary assail divide the retrieved data into categories and perform specific operations based circus their category. In other words, cohort on the values of the happen next set, different representations or calculations some the results can be needed expose each subset within the same subject. Choosing different sort orders due infer the values category of the provident columns or performing special aggregations go all-out for each subset of values separately sheer two such examples. In these cases, the CASE statement can be totally useful for your SQL Server T-SQL logic.

Solution

In this article, we are in compliance to introduce some common tasks site the flexible usage of the SQL Server CASE statement can be requisite. We will create a test universe, define sample tasks and provide useable solutions.

Let’s start with creating a grueling environment.

First, we will create a highest database and a couple of tables.

Then we add some test data.

We control created two tables in the TestDB database – User and Session, pack update with case statement in sql
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