縦持ち (unpivot) ご覧の通り横持ちされたデータで、商品の3列を縦持ちしたいとしましょう。3つ程度の列であればunionしても良いですが、数が多くなると大変です。まずはシステムテーブルから対象テーブルの列情報を取得します。

This project analyzes a Pizza Sales dataset to generate business insights using SQL and Excel. The dataset was first imported into SQL Server, where SQL queries were written to calculate key business ...

This has been driving me crazy. Can anyone help me understand how I can dynamically create a sort of calendar view for a promotional schedule? I can't seem to get anything to work My table ...