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What is difference between Rename and Alias?
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Answer / ali
Alias is the temporay name , where as rename is the permanent given.
RENAME:
1. RENAME OLD_TABLENAME to NEW_TABLENAME;
2. alter table table_name rename column column_name to new_columnname;
ALIAS:
1. select ename as name from table_name1 as empl1, table_name2 as empl2 where empl1.id = empl2.id;
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