Setting a Column Value to NULL in PL/SQL
To set a column value to NULL in PL/SQL, the UPDATE statement is used. The syntax for updating a column to NULL is as follows:
UPDATE table_name
SET column_name = NULL
WHERE condition;
Here,
- UPDATE: SQL keyword used to modify or change existing records in a table.
- table_name: The name of the table that you want to update.
- SET: SQL keyword indicating the column you want to modify.
- column_name: The specific column within the table that you want to update.
- NULL: Set the value of the specified column to NULL.
- WHERE: SQL keyword used to filter the rows that will be updated.
- condition: The criteria that the rows must meet to be updated. If omitted, all rows will be updated.
How to Set a Column Value to Null in PL/SQL?
In PL/SQL, setting a column value to NULL is a common requirement when working with databases. Understanding how to accomplish this task is essential for database developers and administrators. In this article, we will delve into the concept of setting a column value to NULL in PL/SQL, covering the syntax, examples, and output explanations.
- PL/SQL: A procedural language extension for SQL by Oracle.
- NULL: Represents a missing or unknown value in a database.
- Database Management: A crucial skill for developers and administrators.