sql запрос

[Alex3840229]

возможно я не верно sql запрос делаю.

SELECT DocumentMaterial.CodeMaterial, Material.Name AS NameMaterial, Unit.Name AS NameUnit, DocumentMaterial.CodeUnit, '' AS Pusto,
SUM(DocumentMaterial.Count) AS VCount, SUM(DocumentMaterial.Sum) AS VSum, '' AS Pusto1, SUM(DocumentMaterial_1.Count) AS VCount1,
SUM(DocumentMaterial_1.Sum) AS VSum1, '' AS Pusto2, SUM(DocumentMaterial_2.Count) AS VCount2, SUM(DocumentMaterial_2.Sum) AS VSum2,
'' AS Pusto3, SUM(DocumentMaterial_3.Count) AS VCount3, SUM(DocumentMaterial_3.Sum) AS VSum3, '' AS Pusto4, Currency.Name,
DocumentMaterial.CodeCurrency, DocumentMaterial.Data AS VDate, DocumentMaterial_1.Data AS VDate1, DocumentMaterial_2.Data AS VDate2,
DocumentMaterial_3.Data AS VDate3

FROM DocumentMaterial INNER JOIN
Material ON DocumentMaterial.CodeMaterial = Material.Code INNER JOIN
Unit ON DocumentMaterial.CodeUnit = Unit.Code INNER JOIN
Currency ON DocumentMaterial.CodeCurrency = Currency.Code INNER JOIN
DocumentMaterial AS DocumentMaterial_1 ON Material.Code = DocumentMaterial_1.CodeMaterial AND
Unit.Code = DocumentMaterial_1.CodeUnit AND Currency.Code = DocumentMaterial_1.CodeCurrency INNER JOIN
DocumentMaterial AS DocumentMaterial_2 ON Material.Code = DocumentMaterial_2.CodeMaterial AND
Unit.Code = DocumentMaterial_2.CodeUnit AND Currency.Code = DocumentMaterial_2.CodeCurrency INNER JOIN
DocumentMaterial AS DocumentMaterial_3 ON Material.Code = DocumentMaterial_3.CodeMaterial AND
Unit.Code = DocumentMaterial_3.CodeUnit AND Currency.Code = DocumentMaterial_3.CodeCurrency

GROUP BY DocumentMaterial.CodeMaterial, Material.Name, Unit.Name, DocumentMaterial.CodeUnit, Currency.Name, DocumentMaterial.CodeCurrency,
DocumentMaterial.Data, DocumentMaterial_1.Data, DocumentMaterial_2.Data, DocumentMaterial_3.Data