How to use the ad hoc parameter builder
For a field that supports typing an ad hoc value, you can type the value and use the ad hoc parameter builder operators and characters to provide a QBE expression in the field.
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Figure 3-5  
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Figure 3-6 shows the result of adding two pipe signs (|) and typing several values. The resulting QBE expression specifies that the values must match 'A', 'B', or 'S'.
Figure 3-6  
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Table 3-5 provides examples of QBE expressions.

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