IQueryDef Interface
IQueryDef sets the parameters needed to create an attribute query. The name of the table and a string defining the where clause are required. An optional list of columns may be included to specify the columns to be retrieved. If no columns are specified, all columns will be returned. IQueryDef only can be used with Geodatabase and Personal Geodatabase data sources.
Remarks :
The IQueryDef interface allows the definition of an attribute query based on one or more tables. Multiple table joins may be defined through the use of this interface.
Note on ORDER BY and returning sorted data: To add ORDER BY and GROUP BY clauses to the attribute query the IQueryFilterDefinition::PostfixClause property can be used prior to creating the cursor.
The following code excerpts show how to get a reference to an IQueryDef interface, set the values of the SubFields, Tables, and WhereClause properties.
Getting a reference:
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Setting the SubFields, Tables, and WhereClause:
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Multiple tables with a join.
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Using Evaluate:
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Below is a complete example for IQueryDef
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