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Tip

All examples used are valid against the Microsoft Northwind Sample Database You can run the resulting SQL from the examples against Northwind in order to test and play with the SqlObjects library.

UNION

var sql = TSQL

    .SELECT()
      .COLUMN("t", "TerritoryID")
    .FROM("dbo", "Territories", "t")
    .INNERJOIN("dbo", "Region", "r").ON("r", "RegionID").IsEqualTo("t", "RegionID")
    .WHERE("r", "RegionID").IsEqualTo(1)

    .UNION()

    .SELECT()
      .COLUMN("t", "TerritoryID")
    .FROM("dbo", "Territories", "t")
    .INNERJOIN("dbo", "Region", "r").ON("r", "RegionID").IsEqualTo("t", "RegionID")
    .WHERE("r", "RegionID").IsEqualTo(2)

    .Build()

;

Console.WriteLine(sql);

Output:

SELECT
 [t].[TerritoryID]
FROM [dbo].[Territories] t
INNER JOIN [dbo].[Region] r ON [r].[RegionID] = [t].[RegionID]
WHERE 1=1
 AND [r].[RegionID] = 1

UNION

SELECT
 [t].[TerritoryID]
FROM [dbo].[Territories] t
INNER JOIN [dbo].[Region] r ON [r].[RegionID] = [t].[RegionID]
WHERE 1=1
 AND [r].[RegionID] = 2

WHERE 1=1 ?