Use the Diff Viewer to compare differences between DDL and other files. The Diff Viewer supports the following file types:
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 C# (.cs)  | 
 Javascript (.js)  | 
 Visual Basic (.vb)  | 
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 Cascading style sheets (.css)  | 
 Perl (.pl)  | 
 Visual Basic script (.vbs)  | 
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 DDL  | 
 PHP (.php)  | 
 XML documents (.xml)  | 
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 DOS batch (.bat)  | 
 Python (.py)  | 
 XML schema definition (.xsd)  | 
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 HTML (.htm, .html)  | 
 SQL (.sql)  | 
 
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 Java (.java)  | 
 Text (.txt)  | 
 
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To compare differences
Right-click an object in the Object Explorer and select Send To | Diff Viewer as Script.
Use the Diff Viewer toolbar to view any differences.
Tips: