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Oracle ORDER BY


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:

  1. SELECT expressions
  2. FROM tables
  3. WHERE conditions
  4. 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:

  1. CREATE TABLE  “SUPPLIER”
  2.    (    “SUPPLIER_ID” NUMBER,
  3.     “FIRST_NAME” VARCHAR2(4000),
  4.     “LAST_NAME” VARCHAR2(4000)
  5.    )
  6. /

orderbysuppliers

Execute this Query:

  1. SELECT *
  2. FROM supplier
  3. ORDER BY last_name;

Output:

orderbyoutput1

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:

  1. SELECT *
  2. FROM supplier
  3. ORDER BY last_name DESC;

Output

orderbyoutput2

The above example returns the first_name ordered by last_name in descending order.

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