The capability is checked against null in the first part of the if clause.
功能是根据 if 语句的第一部分获得的。
The if clause determines whether the value of the ResponseRequested sub-element for a given comment is equal to Yes.
if子句判断一条给定评论的ResponseRequested 子元素的值是否等于 “Yes”。
If we got an if then statement are we asserting an antecedent, an if clause or the consequent, Q the then clause, or are we saying if P then Q.
如果我们的论述中有如果,我们在主张先行词，假设条件句或者结果，然后从句，或者我们说如果P那么。
The expression used in the if statement (and in the elif clause and the while loop discussed later in this article) can be as complex as necessary.
if语句(以及本文后面讨论的elif子句和while循环)中的表达式可以很复杂。
When the if clause has more than one condition, you can choose to have it evaluate to true when any of the conditions are true or when all of the conditions are true.
当if子句有多个条件时，您可以选择让它在任何条件为true时求值为 true，或者在所有条件都为 true 时才求值为 true。
Ask the students to make up sentences using the adverbial clause of condition with if.
要求学生使用if来组成条件状语从句。
If you do not specify anything for this clause, audit records from all databases in the instance are eligible for extraction.
如果该子句未指定任何内容，那么可以提取来自实例中任何数据库的审计记录。
Use this clause if the table must be up and available at any time.
如果该表在任何时刻都必须是可用的，那么应该使用该子句。
If you want to move a subset of data, you should modify the SELECT clause accordingly.
如果您只希望移动其中一部分数据，那么您应该相应地修改select子句。
If all the columns in the clause appear in the required sequence with a single index, the database server USES the index to read the rows in the ordered sequence, thus avoiding a sort.
如果该子句中所有的列都是以用单个索引要求的顺序出现的，那么数据库服务器就使用索引来按顺序读取行，因而避免了排序。
This clause is not allowed if the column is specified in the primary key, or in a unique constraint of the table (SQLSTATE 42831).
如果表的主键或惟一性约束中指定了这个列，那么不允许使用这个子句(SQLSTATE 42831)。
Only if the WHEN clause evaluates to true will the action part of trigger statement be executed.
仅当when子句的计算结果为真时，触发器语句的操作部分才会执行。
If a value clause is not specified, the initial value of the item is undefined.
如果没有指定value子句，则表示没有定义该项的初始值。
If it weren't for the penalty clause, the case would have been open and shut.
如果没有处罚条款，这个案件将会迅速了结。
For example, if used in a SELECT clause, it returns the partition number for each row of the table that was used to form the result of the SELECT statement.
例如，如果用在一个select子句中，那么该函数将返回表中组成select语句结果的每一行的分区号。
They were able to hold out because Argentina's bonds had no "collective-action clause" forcing everyone to participate if it reached a threshold of takers.
他们之所以有此主张，是因为阿根廷债券没有“集体行动条款”，该条款可以在达到持有人阈值后迫使每个人都参与行动。
If the WHERE clause isn't included, the UPDATE statement modifies the indicated columns for all rows in the table.
如果没有包括where子句，则update语句将修改表中所有行的指定列。
If user specifies a user ID, then the password must either be supplied following the USING clause, or if it's not specified, then DB2MOVE prompts for the password information.
如果USER指定一个用户ID，那么必须在using子句中提供口令；如果没有指定口令，那么DB 2 move会提示输入口令。
If we didn't have the must throwA(…) clause, we would see the following exception thrown.
如果我们没有must throwA(...)子句，我们会看到下面的异常被抛出。
If the WITH not VARIANT clause is specified, then the procedure cannot contain any SQL statements.
如果WITHNOT variant子句被指定，那么过程就不能包含任何sql语句。
If WITH not VARIANT clause is specified, then the function cannot contain any SQL statements.
如果WITHNOT variant子句被指定，那么函数就不能包含任何sql语句。
You can run parallel import sessions, if you add the ALLOW WRITE ACCESS clause to each import command.
如果将ALLOWWRITEACCESS子句添加到每个导入命令中，则可以运行并行导入会话。
What's new in 1.4 is that if you rethrow an exception from the catch clause, you can attach the original cause of the exception.
发行版 1.4中的新功能是如果从catch 子句重新抛出了一个异常，您可以附加上该异常的初始原因。
I could have also dropped the Dictionary: : prefix code if I had written include Dictionary after the require clause.
如果在require子句后面编写了includeDictionary，那么也可以去掉Dictionary：前缀。
这样就完成了“if”子句。
Because the IfExpr is in an expression, unlike a programmatic XSL: if, the else clause is required so there will always be a value.
由于IfExpr是表达式而不是程序性的xsl：if，因此必须有else子句以保证表达式有一个结果。
If so, it skips the validation process by using the WHEN clause in the trigger body.
如果已经执行了验证，那么在触发器代码体中使用when子句跳过验证过程。
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。
If the data provider is an SQL database, the WHERE clause must be applied to each record.
如果数据提供程序是一个SQL数据库，则必须将where子句应用于每条记录。
If the data provider is an SQL database, the WHERE clause must be applied to each record.
如果数据提供程序是一个SQL数据库，则必须将where子句应用于每条记录。
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