This video is to understand the difference between union and union all set operations. Along with that we have also showed some simple solution to the 'ORA-01789: query block has incorrect number of result columns' error message.

If you want more such videos of exciting and amazing 'difference between' concepts, check out the links below :


char and varchar2 : [ Ссылка ]
replace and translate : [ Ссылка ]
procedure and function : [ Ссылка ]
in and exists : [ Ссылка ]
rank and dense_rank : [ Ссылка ]
delete and truncate : [ Ссылка ]
%type and %rowtype : [ Ссылка ]

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