Home Forums SQL Server 2012 SQL Server 2012 - T-SQL how to update column city value from 'A' to 'B' and 'B' to 'A' in single query RE: how to update column city value from 'A' to 'B' and 'B' to 'A' in single query

  • September 29, 2013 at 4:11 pm

    #1654368

    dastagiri16 (9/25/2013)

    hi,

    one of the interviewer asked the question about updating...so i have added test table like below...

    USE [Practice]

    GO

    /****** Object: Table [dbo].[mytable] Script Date: 09/25/2013 13:10:59 ******/

    SET ANSI_NULLS ON

    GO

    SET QUOTED_IDENTIFIER ON

    GO

    CREATE TABLE [dbo].[mytable](

    [city] [nchar](10) NULL

    ) ON [PRIMARY]

    GO

    and i have inserted values like

    insert into mytable (city) values ('A')

    so now i want to write update querty to update city value from A to B then B to A by using any query....

    Not all questions asked by interviewers have a positive answer. Sometimes they ask the "wrong" thing to see what you'll say.

    Also, not all interviewers actually have the knowledge to conduct a proper interview. They might actually but incorrectly believe that you can update the same row more than once in the same "query".

    --Jeff Moden

    RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
    First step towards the paradigm shift of writing Set Based code:
    ________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

    Change is inevitable... Change for the better is not.

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