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Difference between datatype char(n),varchar(n),nchar(n),nvarchar(n) in sql server?

A char datatype takes 1 byte per character. It is a fixed length character datatype i.e even though character entered are less than n,fixed memory size i.e n bytes are allocated to those characters.
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基礎からのSQL Server ～データベースの作成からテーブル作成まで～

SQLの勉強をしている かわ です。 SQLの勉強をするにあたって、Microsoft の「SQL Server Management Studio」（以下、SSMS）で実際にSQLを実行しながら勉強していければと思ったのですが、そもそもSQL Serverでのテーブル作成方法を忘れていたので備忘録程度にまとめて ...
GitHub

use-unicode-native-format-to-import-or-export-data-sql-server.md

Unicode native format is helpful when information must be copied from one [!INCLUDE[msCoName](../../includes/msconame-md.md)] [!INCLUDE[ssNoVersion](../../includes ...
搜狐

Decoding the VARCHAR and N Prefix in Databases: A Comparative Analysis of SQL Server and ...

In the world of relational databases, VARCHAR is one of the most commonly used string data types, primarily used for storing variable-length character data. However, for many beginners, the ...
note

OracleのVARCHAR2をSQL Serverに移したら文字化けと桁落ち。“同じ型”の ...

Oracleで構築された既存システムのデータベースを、SQL Server（SSMS）へ移行するプロジェクト。 要件はシンプルでした： 「前と同じように動けばいい」 「DB構造も極力そのままで」 Oracle側ではVARCHAR2が多用されていたため、Oracleでの定義に合わせ、SQL Serverで ...
Microsoft

Introducing UTF-8 support in SQL Server 2019 preview

With the first public preview of SQL Server 2019, we announced support for the widely used UTF-8 character encoding as an import or export encoding, and as database-level or column-level collation for ...
GitHub

zgstumpf/sql-server-invalidstring

Without proper checks, here are some "null" strings that can enter your database and introduce errors in your applications or data analytics: An empty string. May appear if the application user ...