Applied Biosystems 7900HT Fast Real-Time PCR System and SDS ...

Using the Search ToolLogical Operators(IF, AND, OR)Every statement begins with one of three logical operators: IF, OR, or AND. Thelogical operator determines the relationship between the statements in the Add Filesdialog box.Logical IF StatementsBy default, the first statement in the table is always an IF statement. If a platedocument meets the criteria defined by the statement, it is displayed within the AddFiles dialog box.Logical AND StatementsA logical AND statement evaluates the data set for two expressions: the expressiondefined by the AND statement, and the expression defined by the statement in theprevious table row. When an AND statement is used in a filter table, the softwaredisplays a plate document if it evaluates true for both expressions.Logical OR StatementsSimilar to the logical AND statement, a logical OR statement also evaluates the data setfor two expressions (both the previous and current table rows). When an OR statementis used in a Filter table, the software displays a plate document if it evaluates true foreither expression (or both).Multiple AND and OR StatementsIf dealing with a very large data set, you may want to further refine the number ofplate documents retrieved in a search by creating multiple filter statements. Whencreating multiple statements, remember to create and apply them one at a time toensure that they function as expected. Also, remember that the software applies eachfilter in the order listed in the Add Files dialog box.ColumnCategoriesConditionOperatorsValue 1 and 2CriteriaEach statement evaluates plate documents based on the values of specific platedocument attributes.The Condition operator establishes the relationship between the Column categoryand the Value 1 and Value 2 criteria by defining the action of the evaluation. Thefollowing list summarizes the possible conditional operators and their correspondingactions.• > : Greater than Value 1• >= : Greater than or equal to Value 1• < : Less than Value 1• : Does not equal Value 1• between : Is greater than Value 1 but less than Value 2• contains : Contains the alphanumeric string found in Value 1The Value 1 and Value 2 criteria define the condition(s) for the evaluation.Applied Biosystems 7900HT Fast Real-Time PCR System and SDS Enterprise Database User Guide A-21DRAFTSeptember 1, 2004 11:39 am, App_SWReference.fm