Oracle UPDATE

Summary: in this tutorial, you’ll how to learn how to use the Oracle UPDATE statement to modify data in a table.

Introduction to the Oracle UPDATE statement #

To changes existing values in a table, you use the following Oracle UPDATE statement:

UPDATE table_name SET column1 = value1, column2 = value2, column3 = value3, ... WHERE condition; Code language: SQL (Structured Query Language) (sql)

In this syntax:

• First, specify the name of the table which you want to update.
• Second, provider the name of the column and its news value you want to modify. If you update more than two columns, you separate each expression column = value by a comma. The value1, value2, or value3 can be literals or a subquery that returns a single value. Note that the UPDATE statement allows you to update as many columns as you want.
• Third, specify which row to update in the condition of the WHERE clause. The WHERE clause is optional. If you omit it, the UPDATE statement will update all rows of the table.

Oracle UPDATE examples #

Let’s create a new table with some sample data for the demonstration.

First, create a new table named parts:

CREATE TABLE parts ( part_id NUMBER GENERATED BY DEFAULT AS IDENTITY, part_name VARCHAR(50) NOT NULL, lead_time NUMBER(2,0) NOT NULL, cost NUMBER(9,2) NOT NULL, status NUMBER(1,0) NOT NULL, PRIMARY KEY (part_id) ); Code language: SQL (Structured Query Language) (sql)

Second, insert some sample data to the parts table:

INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('sed dictum',5,134,0); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('tristique neque',3,62,1); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('dolor quam,',16,82,1); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('nec, diam.',41,10,1); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('vitae erat',22,116,0); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('parturient montes,',32,169,1); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('metus. In',45,88,1); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('at, velit.',31,182,0); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('nonummy ultricies',7,146,0); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('a, dui.',38,116,0); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('arcu et',37,72,1); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('sapien. Cras',40,197,1); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('et malesuada',24,46,0); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('mauris id',4,153,1); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('eleifend egestas.',2,146,0); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('cursus. Nunc',9,194,1); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('vivamus sit',37,93,0); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('ac orci.',35,134,0); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('arcu. Aliquam',36,154,0); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('at auctor',32,56,1); INSERT INTO parts (part_name,lead_time,cost,status) VALUES ('purus, accumsan',33,12,1); Code language: SQL (Structured Query Language) (sql)

Third, retrieve data from the parts table:

SELECT * FROM parts ORDER BY part_name; Code language: SQL (Structured Query Language) (sql)

Updating one column of a single row #

The following UPDATE statement changes the cost of the part with id 1:

UPDATE parts SET cost = 130 WHERE part_id = 1;Code language: SQL (Structured Query Language) (sql)

To verify the update, you use the following query:

SELECT * FROM parts WHERE part_id = 1; Code language: SQL (Structured Query Language) (sql)

Updating multiple columns of a single row #

The following statement uses the UPDATE statement to update the lead time, cost, and status of the part whose id is 5.

UPDATE parts SET lead_time = 30, cost = 120, status = 1 WHERE part_id = 5; Code language: SQL (Structured Query Language) (sql)

Updating multiple rows example #

The following uses the UPDATE statement to increase the costs of all parts in the parts table by 5%:

UPDATE parts SET cost = cost * 1.05;Code language: SQL (Structured Query Language) (sql)

Here is the result:

Summary #

• Use the Oracle UPDATE statement to change existing values in a table.