当对表执行ALTER TABLE操作时，MySQL默认会对表进行加锁，阻止其他事务对该表的读写操作，直到ALTER TABLE操作完成。 MySQL表的结构修改往往伴随着表级锁的问题。 特别是对于那些数据量较大的表，这会对业务系统的性能产生显著影响。 通过优化表结构修改的操作 ...

In this article, we will explore how to install and configure File Server on Windows Server and install the necessary roles, configure shared folders, manage permission, and ensure security.

CREATE SERVER defines a new foreign server. The user who defines the server becomes its owner. A foreign server typically encapsulates connection information that a foreign-data wrapper uses to access ...

This chapter describes the syntax of SQL. It forms the foundation for understanding the following chapters which will go into detail about how SQL commands are applied to define and modify data. We ...

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Rashidi Ladoja, a former governor of the state, played a critical role in his emergency as governor in 2019. Makinde stated this while speaking on Wednesday in Ibadan during one of the ceremonies ...

I decided to finally do something about it by building a Plex server. Plex has been around for years, and I’ve dabbled with it in the past. But this time, I wanted to go all out. I wanted to ...

In this episode of the WWE 2K19 My Career series, things start heating up in the career ish, as AM talks about his Universal championship win at WrestleMania, but while he's doing that, the ...

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