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Rule description

• SQL statements should not join too many tables

Non-compliant Code Example

SELECT p.Name AS ProductName, v.Name AS VendorName, ad.State  --Non compliant code (Join tables are more then default defined limit 3)
FROM Production.Product p   
INNER JOIN Purchasing.ProductVendor pv ON p.ProductID = pv.ProductID  
INNER JOIN Purchasing.Vendor v ON pv.BusinessEntityID = v.BusinessEntityID  
INNER JOIN Purchasing.Address ad ON ad.Id = v.BusinessEntityID  
ORDER BY p.Name, v.Name, ad.State;

SELECT p.Name AS ProductName, v.Name AS VendorName, ad.State   --Non compliant code (Join tables are more then default defined limit 3)
FROM Production.Product p, Purchasing.ProductVendor pv,  Purchasing.Vendor v, Purchasing.Address ad 
Where p.ProductID = pv.ProductID  
AND pv.BusinessEntityID = v.BusinessEntityID  
AND ad.Id = v.BusinessEntityID  
ORDER BY p.Name, v.Name, ad.State;