Oracle Order BY Clause
Published by : Obay Salah , December 1, 2024
In Oracle, ORDER BY Clause is used to sort or re-arrange the records in the result set. The ORDER BY clause is only used with SELECT statement.
Syntax:
SELECT expressions FROM tables WHERE conditions ORDER BY expression [ ASC | DESC ];
Parameters:
expressions: It specifies columns that you want to retrieve.
tables: It specifies the table name from where you want to retrieve records.
conditions: It specifies the conditions that must be fulfilled for the records to be selected.
ASC: It is an optional parameter that is used to sort records in ascending order.
DESC: It is also an optional parameter that is used to sort records in descending order.
Oracle ORDER BY Example: (without ASC/DESC attribute)
Let's take a table "supplier"
Supplier table:
CREATE TABLE "SUPPLIER" ( "SUPPLIER_ID" NUMBER, "FIRST_NAME" VARCHAR2(4000), "LAST_NAME" VARCHAR2(4000) ) /
Execute this Query:
SELECT * FROM supplier ORDER BY last_name;
Output:
The above example returns the first_name ordered by last_name in ascending order.
Oracle ORDER BY Example: (sorting in descending order)
If you want to sort your result in descending order, you should use the DESC attribute in your ORDER BY clause:
Execute this Query:
SELECT * FROM supplier ORDER BY last_name DESC;
Output
The above example returns the first_name ordered by last_name in descending order.
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