ArcGIS Pro 3.2 API Reference Guide
ArcGIS.Core.Data Namespace / QueryTableDescription Class
Members Example

In This Topic
    QueryTableDescription Class
    In This Topic
    Represents a mechanism to create a query table, which is a virtual table that represents queries involving one or more tables from the same geodatabase.
    Object Model
    QueryTableDescription ClassQueryDef Class
    Syntax
    public sealed class QueryTableDescription 
    Public NotInheritable Class QueryTableDescription 
    Example
    Creating a QueryTable using a query which joins two versioned tables in a geodatabase
    public async Task QueryTableJoinWithVersionedData()
    {
      await ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
      {
        QueryDef queryDef = new QueryDef
        {
          Tables = "CommunityAddress JOIN MunicipalBoundary on CommunityAddress.Municipality = MunicipalBoundary.Name",
          SubFields = "CommunityAddress.OBJECTID, CommunityAddress.Shape, CommunityAddress.SITEADDID, CommunityAddress.ADDRNUM, CommunityAddress.FULLNAME, CommunityAddress.FULLADDR, CommunityAddress.MUNICIPALITY, MunicipalBoundary.Name, MunicipalBoundary.MUNITYP, MunicipalBoundary.LOCALFIPS",
        };
    
        using (Geodatabase testVersion1Geodatabase = new Geodatabase(new DatabaseConnectionProperties(EnterpriseDatabaseType.Oracle)
        {
          AuthenticationMode = AuthenticationMode.DBMS,
          Instance = "instance",
          User = "user",
          Password = "password",
          Database = "database",
          Version = "user.testVersion1"
        }))
        {
          QueryTableDescription queryTableDescription = new QueryTableDescription(queryDef)
          {
            Name = "CommunityAddrJounMunicipalBoundr",
            PrimaryKeys = testVersion1Geodatabase.GetSQLSyntax().QualifyColumnName("CommunityAddress", "OBJECTID")
          };
    
          // Will be based on testVersion1.
          using (Table queryTable = testVersion1Geodatabase.OpenQueryTable(queryTableDescription))
          {
            // Use queryTable.
          }
        }
    
        using (Geodatabase testVersion2Geodatabase = new Geodatabase(new DatabaseConnectionProperties(EnterpriseDatabaseType.Oracle)
        {
          AuthenticationMode = AuthenticationMode.DBMS,
          Instance = "instance",
          User = "user",
          Password = "password",
          Database = "database",
          Version = "user.testVersion2"
        }))
        {
          QueryTableDescription queryTableDescription = new QueryTableDescription(queryDef)
          {
            Name = "CommunityAddrJounMunicipalBoundr",
            PrimaryKeys = testVersion2Geodatabase.GetSQLSyntax().QualifyColumnName("CommunityAddress", "OBJECTID")
          };
    
          // Will be based on testVersion2.
          using (Table queryTable = testVersion2Geodatabase.OpenQueryTable(queryTableDescription))
          {
            // Use queryTable.
          }
        }
      });
    }
    Inheritance Hierarchy

    System.Object
       ArcGIS.Core.Data.QueryTableDescription

    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also