These characters signify the start of a delimited token. They are terminated by an associated end character. To enter a literal backslash in a query, use two in succession. Precedence rules While an expression is read from left to right, some operators carry more weight than others. AND operators, for example, take precedence over OR operators.
Information enclosed by parentheses is read first.
There must be at least on space between operators and words used in the expression. Look for documents that contain b or c as well as a , or that contain d . Prefix and Infix notation Search strings that use any operator except evidence operators can be defined in prefix notation or infix notation. When prefix notation is used, precedence is handled explicitly within the expression. Infix notation specifies that thte opreator is to be specified etween each elemenet within the expression.