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Interview questions and answers on various SQL Server areas such as Database Administration, TSQL Development, BI etc.

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SQL Server Interview Questions

  • TSQL Exercise

    bmaster1962 posted 2 Years ago
    What will be the result of query:
    SELECT 
         COUNT(*) as C1, 
         COUNT(A) as CA, 
         COUNT(B) as CB, 
         SUM(A) as SA, 
         SUM(B) as SB
    from [test].[dbo].[Table_1]
    
    On table:
    ID          A    B
    ----------- ---- ------
    1           1    NULL
    2           3    NULL
    3           NULL    4
    
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