| Siebel Fundamentals for Siebel Open UI > Using Query to Locate Information >  Compound Query Operators
 Table 16 shows compound query operators. In this table, operators appear in uppercase. However, query strings are case-sensitive. The operators do not have to be in uppercase.  When you perform a compound query, you must use parentheses to control the order in which the search for matching records is performed. 
Table 16.	 Compound Query Operators
    |  |  |  |  
    | AND, and | Placed between values, returns only records for which all the conditions are true. | *performance* AND *memory*finds all records that contain both performance and memory in the query field.
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    | OR, or | Placed between values, returns records for which at least one condition is true. | *performance* OR *memory*finds all records that contain either performance or memory in the query field.
 performance* OR memory*finds all records that start with either performance or memory in the query field.
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    | NOT, not | Placed before a value, returns only records that do not contain the value. | *performance* AND NOT LIKE *memory*finds all records that contain performance but not memory in the query field.
 NOT (performance OR memory)finds all records that contain neither performance nor memory in the query field.
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    | () | Placed before and after the values and operators that are processed first, regardless of the default processing order. | (sun OR moon) AND NOT stars returns records that contain sun or moon, but not stars, in the query field.
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    | LIKE, like | Placed before a value, returns records containing the value. | (performance* OR memory*) AND LIKE (problem)finds all records in which the query field starts with performance or memory and also includes problem.
 NOTE:  The LIKE operator is case sensitive. To find matches regardless of case, see Table 15. |  
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