sql - Update query that will set specific columns in a record with values from another record of same table -


look @ query; 

update user_data set old_status= 'snnnns',                      user_group='15',                      default_rate='default',                      entity_num='1001' user_name='dasu';

i know write query , result, dont want writing values. these values record user_name 'sys' in same table. want query update these particular columns in 'dasu' values 'sys'.

any idea?

in oracle, can use merge self-join. alternatively, can write correlated subqueries in update:

update user_data     set (old_status, user_group, default_rate, entity_num) = (select old_status, user_group, default_rate, entity_num user_data user_name = 'sys') user_name='dasu';

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