Rohan questions

Rohan answers

• date time difference get hour:minutes:seconds
• Number of recursive calls
• Multiplying two columns of same table and storing result to the third column of same table
• if(a,b,c,d) how does this work? [duplicate]
• T-SQL if statement error
• Requested resource is not available in spring MVC
• Is there an XML Editor with grid view similar to that of XMLSpy? [closed]
• Error Code: 1215. Cannot add foreign key constraint (foreign keys)
• How to retrieve specific rows from SQL Server table?