Equal to (=) Operator
In both simple and advanced searches, the equal to (=) operator is the default relational operator used. Though you cannot specify a different relational operator with a simple search, with an advanced search you can select any other relational operator from the Operator drop-down list on the Advanced Search page.
Use the equal to (=) operator to retrieve only those documents that contain, in the specified index field, the index value contained in the search phrase.
Customer Name = Bob's Records retrieves all documents with an index value of Bob's Records in the Customer Name index field.
Ship Date = 01/31/2001 retrieves all the documents with an index value of 01/31/2001 in the Ship Date index field.