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条SQL

条SQL

条SQL

条SQL

1

A stored procedure can be seen as one or more SQL commands that already reside at the database server, prepared and ready to be executed .

存储过程可以被视为一条或多条已驻留在数据库服务器中、准备好执行的 SQL 命令。

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In a minute, you will see me reference that nickname in a SQL statement that I provide to a Blox tag to create the report in Figure 4 .

很快，您将看到我在一条 SQL 语句中引用这个昵称，这条 SQL 语句是我提供给一个 Blox 标签用于创建图 4 中所示报表的。

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The first rule is to always provide only the exact columns that you need to retrieve in the SELECT-list of each SQL SELECT statement .

第一条规则是始终在每条 SQL SELECT 语句的 SELECT 列表中只提供确实需要检索的那些列。

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But we're not done yet. If the data provider is an SQL database , the WHERE clause must be applied to each record.

事情还没有完结，如果数据提供者是一个 SQL 数据库的话，WHERE 子句必须应用在每条记录上。

10

From the security perspective , placeholders ensure that only a single value gets bound into the statement , preventing SQL statement error .

从安全性的角度来看，占位符可以确保只有一个值可以插入到这条语句中，从而可以避免出现 SQL 语句错误。

11

Button and type in an SQL statement that is close to what you want to return when you are finished .

按钮，输入一条 SQL 语句，这条语句非常接近于完成操作时应该返回的语句。

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GET DIAGNOSTICS statement supports retrieval of almost any fields of SQLCA area, populated by the database for each SQL statement .

GETDIAGNOSTICS 语句几乎支持对 SQLCA 区域的所有字段的检索，该区域由用于每条 SQL 语句的数据库来填充。

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If you have not rebooted since installing SQL Anywhere Studio, you may get an error message at this point.

如果在安装了 SQL AnywhereStudio 后没有重新启动，您可能会在这时看见一条错误消息。

21

Because SQL is a non-procedural language , a single statement can take the place of a series of procedures .

因为 SQL 是一种非过程化语言，所以一条语句可以代替一系列过程。

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This is an SQL statement used to load group information for a user .

这是一条用于为用户加载组信息的 SQL 语句。

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Note : Some database systems require a semicolon at the end of the SQL statement . We don't use the semicolon in our tutorials.

注意：一些数据库系统需要在每条 SQL 语句结束后带上分号。在我们的教程中将不使用到分号。

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It 's essentially the same as the SQL statement , except for the additional request for the URI .

这条语句在本质上与 SQL 语句相同，不同之处是对 URI 的附加请求。

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