note

【SQL入門】データ集計時の「空白（NULL）」を安全な値に置き換える ...

Webシステムの開発やデータ分析において、データベースから情報を取得する際、「データが未登録（NULL）」である状態の扱いに悩まされたことはありませんか。 具体的なコマンドの記述方法や、実践的なサンプルコードについては、以下のメインブログ ...
GitHub

isnull-geometry-data-type.md

The type of a geometry instance is null. Returns 0 if the instance isn't null. This method is primarily used by the SQL Server infrastructure; it isn't recommended that you use IsNull to test whether ...
GitHub

SQL Syntax ISNULL(column1,column2) is Not supported after 1.6.0

With upgrade to 1.6.0 , ISNULL / COALESCE syntax is having issue in Order by . .OrderBy(" ISNULL( Col1, Col2) ") "No property or field 'ISNULL' exists in type 'ClassName' (at index 0) at ...
Ars Technica

Settle an argument: SQL update with left join + isnull() vs inner join

I've been in an argument with one of our devs that took an update statement with an inner join and made it a left join (because inner was missing some records somehow in the left table - tableB in ...