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 ...

在关系型数据库中，VARCHAR 是最常用的字符串数据类型之一，用于存储变长字符数据。对于不了解的用户，可能会不清楚不同数据库中 VARCHAR 的区别。不同数据库对 VARCHAR 的实现逻辑、字符集支持及使用细节存在显著差异，其中 SQL Server 与 PostgreSQL 的差异比较 ...

Oracle SQL Developer is a great tool for managing Oracle Databases. It has a user-friendly interface that makes it easier to handle database tasks. The software offers features to simplify workflows ...

Version 8.0 of the QuestDB time series database is said to be significantly faster. Furthermore, the open source version now also supports ZFS compression. After just over a month, the developers of ...

在mysql建表sql里，我们经常会有定义字符串类型的需求。 比方说user表里的名字，就是个字符串。mysql里有两个类型比较适合这个场景。 char和varchar。 声明它们都需要在字段边上加个数组，比如char(100)和varchar(100)，这个100是指当前字段能放的最大字符数。 char和 ...

Running Achilles generates an achillesError_2004.txt file, due to too short of a varchar being set for one of the queries. 1-22 06:49:01 Analysis 2004 -- ERROR Error ...

今天我们来对比下 ORACLE 与 MYSQL 中不同字符数据类型的异同，以避免因前期数据结构设计时数据类型选用不当，造成后续存储加工和处理数据时的各种坑。 本文转载自微信公众号「明哥的IT随笔」，作者 IT明哥 。转载本文请联系明哥的IT随笔公众号。 今天我们来 ...

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 ...