Cursors in oracle for updating all records examples


29-Oct-2019 19:30

cursors in oracle for updating all records examples-20

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v_name); end if; end loop; close cur_load; end; MERGE INTO stud Load l USING ( SELECT stud Id, stud Name FROM student ) s ON (Id = Id) WHEN MATCHED THEN UPDATE SET Name = Name WHERE Name !It declares a type, which you place the data within in bulk, 10,000 rows at a time. However, as I say this will not be as efficient as Name ; type t__data is table of c_data%rowtype index by binary_integer; t_data t__data; begin open c_data; loop fetch c_data bulk collect into t_data limit 10000; exit when t_data.count = 0; for idx in t_data.first ..

It is important not to allow one operation to succeed while the other fails.You use three commands to control a cursor: You must declare a cursor before referencing it in other statements.You give the cursor a name and associate it with a specific query.= Name WHEN NOT MATCHED THEN INSERT (ID, Name) VALUES (Id, Name) To actually answer your question I would do it something like as follows.

This has the benefit of doing most of the work in SQL and only updating based on the rowid, a unique address in the table.

Until a SQL data manipulation statement is executed, CREATE TABLE dept_temp AS SELECT * FROM departments; DECLARE dept_no NUMBER(4) := 270; BEGIN DELETE FROM dept_temp WHERE department_id = dept_no; IF SQL%FOUND THEN -- delete succeeded INSERT INTO dept_temp VALUES (270, 'Personnel', 200, 1700); END IF; END; / CREATE TABLE employees_temp AS SELECT * FROM employees; DECLARE mgr_no NUMBER(6) := 122; BEGIN DELETE FROM employees_temp WHERE manager_id = mgr_no; DBMS_OUTPUT.



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