• Select case

    When jdt_jty_code IN ('ISCO','ISSP','IECO','IECM','IESP','IEHD','ISHD','FRSI') Then 'Install'

    When jdt_jty_code IN ('SB42','SB4W','HD42','HD4W','SA2C','SA2W','HD2C','HD2W','SNCO') Then 'Service Call'

    Else 'UNKNOWN' END

    “Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

    For fast, accurate and documented assistance in answering your questions, please read this article.
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    Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden