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05.13.2008 at 09:50PM PDT, ID: 23400294
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9.2

Bulk update VS Cursor loop update

Asked by nskmore in Databases Miscellaneous

Tags: , ,

I need to update user information in a huge table. First name and last name columns have to be replaced by same length masked values. Which of the following ways is the most efficient solution.

1)    Bulk Update the table as follows
                               Update table
                               Set first_name = masking functions and apply logic on the first_name,
                                last_name = masking functions and apply logic on the last_name
 
2)     Use Cursor as follows
                        cursor c is select * from table;
                        open c
                                    first_name_modified :=  modify c.first_name to mask the actual values;
                                     last_name_modified :=  modify c.last_name to mask the actual values;
                                     update table set
                                                       first_name = first_name_modified,
                                                       last_name = last_name_modified
                                      where table_id = c.table_id
                         close c;
Note: This masking logic involves the use of a lot of string functions like substr,decode,lpad etc etc.

 
                               
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[+][-]05.14.2008 at 07:00AM PDT, ID: 21564255

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About this solution

Zone: Databases Miscellaneous
Tags: Oracle, pl/sql, pl/sql
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Solution Provided By: mark_wills
Participating Experts: 1
Solution Grade: A
 
 
[+][-]09.09.2008 at 02:55PM PDT, ID: 22432700

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[+][-]09.14.2008 at 05:28AM PDT, ID: 22472119

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