sql xml 转datatable 存储过程 笔记

CREATE PROCEDURE P_GetTable_By_XML @XML XML

AS

SELECT S.value('local-name(.)', 'NVARCHAR(20)') AS ColumnName

INTO #tColumns

FROM @XML.nodes('/Root/Schema/*') T ( S )

DECLARE @strXML NVARCHAR(MAX) = 'DECLARE @XML XML = N'''

+ CAST(@XML AS NVARCHAR(MAX)) + ''''

DECLARE @strTableSql NVARCHAR(MAX) = ' DECLARE @tResultTable Table ('

DECLARE @strInsertSql NVARCHAR(MAX) = ' INSERT INTO @tResultTable ('

DECLARE @strSelSql NVARCHAR(MAX) = ' select '

DECLARE @strFromSql NVARCHAR(MAX) = ' FROM @XML.nodes(''/Root/Row'') T(S)'

DECLARE @strSelectSql NVARCHAR(MAX) = 'SELECT * FROM @tResultTable'

SELECT @strTableSql = @strTableSql + '[' + a.ColumnName

+ '] NVARCHAR(max),' ,

@strInsertSql = @strInsertSql + '[' + a.ColumnName + '],' ,

@strSelSql = @strSelSql + 'S.value(' + '''' + '(' + a.ColumnName

+ ')[1]'' , ''NVARCHAR(max)''),'

FROM #tColumns a

SET @strTableSql = LEFT(@strTableSql, LEN(@strTableSql) - 1) + ')'

SET @strInsertSql = LEFT(@strInsertSql, LEN(@strInsertSql) - 1) + ')'

SET @strSelSql = LEFT(@strSelSql, LEN(@strSelSql) - 1)

EXEC(@strXML + @strTableSql + @strInsertSql + @strSelSql + @strFromSql + @strSelectSql)

DROP TABLE #tColumns

GO