How to bulk update field values in Oracle?

To change the values of fields in Oracle database in bulk, you can use the UPDATE statement. Here is an example:

UPDATE 表名 SET 字段名 = 新值 WHERE 条件;

In this case, the table name refers to the name of the table to be modified, the field name is the name of the field to be modified, the new value is the value to be set, and the condition is an optional condition used to specify which records to modify.

If you want to change the field values of all records, you can omit the WHERE condition. Here is a specific example:

UPDATE employees SET salary = 5000;

This will set the value of the salary field for all records in the employees table to 5000.

If you want to modify the field values of certain records based on a condition, you can specify the condition in the WHERE clause. Here is an example:

UPDATE employees SET salary = 5000 WHERE department = 'IT';

This will set the salary field to 5000 for records in the employees table where the department field is ‘IT’.

It should be noted that bulk changes to field values may have a significant impact on the database, so it is advisable to back up the data before performing any modifications and proceed with caution.