To use a table subquery, you need to use an SQL operator to combine the embedded query with a Boolean expression.
要使用表子查询，需要使用SQL操作符将嵌入式查询与布尔表达式组合在一起。
Note: the query optimizer considers using a functional index when the index expression is used in a relational expression or as an argument to one of the operator class functions.
注意：当索引表达式被用于关系表达式，或作为某个操作符类函数的参数时，查询优化器将考虑使用函数索引。
The operator USES rule files containing regular expression rules to extract concepts from text columns.
这个操作器使用包含正则表达式规则的规则文件从文本列中提取出概念。
Generate the expression for the join predicate by applying the join operator to the expressions for the left and right attributes.
将联结操作符应用于左右属性的表达式，从而产生联结谓词的表达式。
The WHERE clause contains two expressions that are joined by the or operator, which means that if either expression evaluates as TRUE for a specific row, that row will be deleted.
where子句包含由OR操作符联结的两个表达式，这意味着对于特定行，如果任一表达式值为TRUE，则将删除该行。
Right-click the first output port (Output) of the Regular Expression Lookup operator and select Create suitable table from the context menu.
右键单击RegularExpressionLookup操作器的第一个输出端口 (Output)，从上下文菜单中选择Createsuitabletable。
The * operator matches the previous expression 0 or more times.
操作符 *匹配之前的表达式零次或零次以上。
Equally clearly, int or double may not: find uses the expression *first, and the dereference operator makes no sense for an object of type int or of type double.
同样的，或者不是int和double：find使用表达式 *first，这个废弃的操作使int对象或者double对象没有意义。
This expression can be as simple as a variable (as shown in Listing 2) or a method call (like getList()), or a complex expression that involves boolean logic or a ternary operator.
表达式可以简单到就是一个变量（如清单2 所示）或者是一个方法调用（例如getList()），亦或是包含布尔逻辑或三目运算符的复杂表达式。
For Java developers, this is exactly the way the ternary operator — the? : expression — works.
表达式——的工作方式。
Just like the n1 + n2 expression from the previous statement, this value is given by an expression involving the + operator.
就像前面语句中n1 +n2这个表达式一样，这次也是通过一条含有+的表达式来赋值的。
The alternation operator (|) matches either the preceding or following expression.
交替操作符（|）匹配前置或后置表达式。 它必须匹配前一个或后一个表达式之一。
It is a greedy operator. Consider the following expression.
它是一个贪婪操作符。
When an expression is evaluated, each operator is applied to the data values represented by the surrounding terms.
当一个表达式被赋值时，每个操作符将会被应用于其周围所有项所代表的数值。
Any expression which is used to build up a compound sentence out of simpler sentences will be called a sentential operator, because it "operates" on sentences to produce more complex forms.
任何一个用于从简单句子构成复杂句的表达项称为一个句子运算符，这是因为它在句子上进行“运算”以产生出更复杂的形式。
Listing 15 applies the decltype operator on a variable and shows the usage of the operator with an expression.
清单15对一个变量应用decltype操作符，演示对表达式使用这个操作符的方法。
If you prefer not to use a long string concatenation statement like this, an alternative is to use the string formatting operator which enables you to have an expression like.
如果不喜欢使用这么长的字符串连接语句，另一种方法是使用字符串格式操作符，可以使用下面这样的表达式。
The next statement in the loop body is a second if statement that tests whether the variable I is evenly divisible by 125, but this expression is preceded by the not operator.
循环体中的下一个语句是第二个if语句，它测试变量i是否能被125整除，但是该表达式前面加了一个not运算符。
With the Regular expression Lookup operator you can find the text sections that match the expressions contained in the selected rule files.
通过使用RegularExpressionlookup操作器，可以找到与所选规则文件中包含的表达式匹配的文本部分。
An operator, such as the + sign, is a character (or sometimes a short sequence of characters) that indicates a computational operation. In an expression, a term must be one of the following.
操作符，例如+，是一个字符(或者有时候是一小串字符)指明了运算种类。
When an expression contains more than one operator, the order of evaluation depends on the order of operations.
表达式可能会包含不止一个运算符，这些不同的运算先后次序就是运算符的优先级。
Do not use an increment or decrement operator on the same object in more than two subexpressions of the same expression.
一个表达式里，不要在两个或更多的子表达式中对同一对象做自增或自减操作。
Note that numeric literals do not include a sign; a phrase like -1 is actually an expression composed of the operator - and the literal 1.
注意数值型的字面值不包括符号(译注：正负号)，像-1实际上是个组合了一元运算符“-”和字面值1的表达式。
This type of expression uses one pair of parentheses for each operator. Theparentheses dictate the order of operations; there is no ambiguity. There isalso no need to remember any precedence rules.
有一种书写表达式的方法叫做“完全括号”，这种表达式把每一个操作符都加了括号，表达完全精确，也不必记忆优先级规则。
Using the current commonly used operator priority method, introduces a common expression of the calculation process, and one of the key issues, operator precedence matrix design and implementation.
使用目前常用的算符优先法，对通用表达式计算过程进行了介绍，并对其中的关键问题——运算符优先矩阵的设计和实现进行了研究。
This article used the operator first to analyze and the storehouse method has given the arithmetic expression computation process.
本文采用算符优先分析和堆栈的方法给出了算术表达式的计算过程。
Just enclose the query expression in parentheses, and then apply the dot operator and call the method.
只需将查询表达式括在括号内，然后应用点运算符并调用此方法。
On the other hand, it can be used within a parenthesized expression or within the second expression of a conditional operator in such contexts.
另一方面，它可以使用在一个带括号的表达式或在第二个表达式在这样的环境条件操作符。
On the other hand, it can be used within a parenthesized expression or within the second expression of a conditional operator in such contexts.
另一方面，它可以使用在一个带括号的表达式或在第二个表达式在这样的环境条件操作符。
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