Difference between Implicit and Explicit Cursors:
Implicit Cursor: When select commands are executed, implicit cursors are created automatically.
Explicit Cursor: The user must define explicit cursors by giving them a name.
Implicit Cursor: They can only retrieve a single row at a time.
Explicit Cursor: Multiple rows can be retrieved by using explicit cursors.
Implicit Cursor: After execution, it automatically closes.
Explicit Cursor: Need to close after execution.
Implicit Cursor: implicit Cursors are characterized as:
BEGIN
SELECT attr_name from table_name
where CONDITION;
END
Explicit Cursor: Explicit Cursors are characterized as:
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DECLARE |
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CURSOR cur_name IS |
|
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SELECT attr_name from table_name |
|
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where CONDITION; |
|
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BEGIN |
|
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... |
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