How to delete>?
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Thread: How to delete>?

  1. #1
    Join Date
    Jan 2001
    Posts
    642
    Hi,
    I have a index on a 'number' column. As this column has very large values, it shows in exponentials when I make a select statement(shows a 5.173E+10 for a value
    5173059437517)

    Now I want to delete this particular record .so when I say
    delete from table
    where col_name = 5173059437517, it deletes 0 recors.

    if i say
    delete from table
    where to_char(col_name) = to_char(5173059437517),
    it's not making use of index.

    1) So How do I delete this record.
    2) If i convert the datatype of a indexed column for quering, will it still use the indexes.
    Badrinath

  2. #2
    Join Date
    Feb 2001
    Posts
    184
    If You use any Function on any Column the Index use is Eliminated unless you have Function-Based Index.

    Two ways, get the Exact Number and the Rowid for that,
    Set Numwidth 25
    Then select this record with Rowid... Then Issue Delete from ..
    Where Id= This is

    Or You can use the Where Rowid = The Rowid..
    Should be Fine,

    Thanks

  3. #3
    Join Date
    Feb 2001
    Location
    Bombay,India
    Posts
    530
    Hi,
    Every row in Oracle has a rowid associated with it.U can query the rowid of the row and then use the delete statement to delete that particular row.Any questions contact me at rohitsn@altavista.com


    Regards,
    Rohit Nirkhe

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