How to batch modify oracle

In Oracle database, batch modification operations are sometimes required. If you manually modify one by one, it will not only waste time, but also be error-prone. At this time, we can use PL/SQL language to perform batch modification operations.

PL/SQL is a high-level language in Oracle database, which can be embedded in SQL statements. When making batch modifications, we can use PL/SQL to write programs to implement batch modification operations. The following will introduce how to use PL/SQL to perform Oracle batch modifications.

The first step is to write a PL/SQL program. Writing PL/SQL programs requires the use of PL/SQL development tools, such as Oracle SQL Developer. The following is a simple PL/SQL program example for batch modification:

DECLARE
   CURSOR c IS SELECT * FROM table_name;
BEGIN
   FOR r IN c LOOP
      UPDATE table_name SET column_name = new_value WHERE condition;
   END LOOP;
   COMMIT;
END;

In the above example, DECLARE defines a cursor (CURSOR) for obtaining data that needs to be modified in batches. Then, use a FOR loop to traverse the cursor and modify each piece of data. Finally, use the COMMIT statement to commit the changes.

The second step is to execute the PL/SQL program. Open Oracle SQL Developer and connect to the target database. Enter the PL/SQL program in the SQL window and click the "Execute" button to execute the program.

After executing the PL/SQL program, batch modification operations will be performed. The specific effect of the modification operation depends on the specific procedures and operations. Note that modification operations in PL/SQL programs are not automatically submitted. We need to use the COMMIT statement to submit modifications manually. Otherwise, the modification results will not take effect.

To summarize, when performing batch modification operations in the Oracle database, we can use PL/SQL to write programs. Writing programs requires the use of PL/SQL development tools, such as Oracle SQL Developer. In the program, we need to define a cursor, traverse the cursor to perform modification operations, and manually submit the modification after the modification is completed.

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