Cursors in oracle for updating all records examples 100 free hot russian sex dating


24-Aug-2014 02:43

declare2 type auth_cursor is ref cursor;3 c1 auth_cursor; 4 r_c1 author%rowtype;5 begin6 open c1 for select * from book;7 fetch c1 into r_c1;8 close c1;9 end;10 / declare*ERROR at line 1: ORA-06504: PL/SQL: Return types of Result Set variables or query do not match ORA-06512: at line 7 Notice that the error message is pointing to the DECLARE clause.That is because the block successfully compiled and only threw the error when it was executed.Before assigning a cursor variable, a cursor type must be defined.By strongly typing the cursor variable, you define what the cursor can return.Oracle already provides an automatic exclusive locking mechanism for the rows you want to update.However you can override it to customize the performance (for example, if you need consistent data and/or exclusive access for the duration of a whole and more complex transaction).

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Once the cursor type is defined, the actual variable can be defined as the cursor type.The lock is released after a commit or rollback only.