今回は，DML文について解説します。DMLとはData Manipulation Languageの略で，表（テーブル）内の行（レコード）の追加（INSERT）や削除（DELETE），列値の更新（UPDATE）などを行う際に使用するSQL文のことを指します。

Now we need to change all duplicate values to null. In other words, after grouping by the first two fields (or one of them), only the first record in the group remains unchanged, and the first two ...

Twice in the past couple of months I’ve gotten tripped up by the same data issue when using LINQ to Entities in the .NET framework. I create a simple view in my database which performs some ...