Different SQL Delete Statement -


i have table 'department' inside database , delete rows. ask if

the result of sql delete code: 

delete itd department itd itd.departmentid = 1

is same result of this:

delete department  departmentid = 1

does both codes delete entry in table?

the both same. first optional.

in short, use syntax 1 specify table data has deleted if condition deleting data involves using 2 tables.

delete t1     exists (    select t2.some_id      t2     t2.some_id = t1.some_id );

this can written 

delete t1  t1, t2 t1.some_id = t2.some_id;

hope clear now. more information see msdn link


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