Note also that SQL commands end with a semicolon.

另请注意，SQL 命令以分号结尾。

In this video, you'll learn what SQL is and how it works with relational databases.

在本视频中，您将了解什么是 SQL 以及它如何与关系数起工作。

We'll offer a simple SQL database for the user data.

我们将用户数提供个简单 SQL 数。

And we'll do the same with Python and SQL and other languages as well.

我们也将对Python、SQL和其他语言执行同样操作。

By sending in a malicious username, with embedded SQL commands!

通过发送带有嵌入式 SQL 命令恶意用户名！

To do this, the server will execute code, known as a SQL query, that looks something like this.

此，服务器将执行代码，称 SQL 查询，看起来像这样。

I am also familiar with SQL statements, Linux commands, and testing tools such as Charles, Postman, and fielder.

同时， 我对SQL语句、Linux命令以及Charles、Postman和Fiddler等测试工具也有所掌握。

This command instructs the SQL database to delete the table containing all user data.

此命令指示 SQL 数删除包含所有用户数。

Here, we'll validate and sanitize any user input to prevent things like SQL injection, cross-site scripting, or other malicious attacks.

在这里，我们将验证和清理任何用户输入，以防止 SQL 注入、跨站点脚本或其他恶意攻击等情况。

Beyond development, I have hands-on experience with database optimization (SQL Server, PostgreSQL, MySQL), middleware (Redis, RabbitMQ, Elasticsearch), and DevOps tools to enhance system performance.

除了开发工作外，我还具备数优化（SQL Server、PostgreSQL、MySQL）、中间件（Redis、RabbitMQ、Elasticsearch）以及DevOps工具实践经验，以提升系统性能。

So for we like collect like certain profiling data in our SQL database that we then can do like It's like, okay, what analysis is taking too long?

因此，我们倾向于在我们SQL数中收集某些分析数，这样我们就能进行诸如“哪些分析耗时过长？ ” 之类分析。

Either way, we don't care, because it's the next SQL command we're interested in: " drop table users" – a command that we injected by manipulating the username field.

无论哪种方式，我们都不关心，因这是我们感兴趣下个 SQL 命令：“drop table users”——我们通过操作用户名字段注入命令。

That value is copied into the SQL query by the server, based on what the user typed in, so the actual command that's sent to the SQL database would look something like this, where username equals philbin.

服务器根用户输入内容将该值复制到 SQL 查询中，因此发送到 SQL 数实际命令看起来像这样，其中用户名等于 philbin。

SQL is a good choice for Twitter's user data because it allows for efficient querying on structured user attributes, it ensures data integrity with ACID transactions, and it can handle complex joins and aggregations for user analytics.

SQL 是 Twitter 用户数不错选择，因它允许对结构化用户属性进行高效查询，确保 ACID 事务数完整性，并且可以处理复杂联接和聚合以进行用户分析。