How to Change Date Format to 'Dd-Mon-Yy' In Oracle?

8 minutes read

To change the date format to 'dd-mon-yy' in Oracle, you can use the TO_CHAR function. Here is an example of how you can do this:


SELECT TO_CHAR(sysdate, 'DD-MON-YY') FROM dual;


In this example, sysdate is the date value that you want to format, and 'DD-MON-YY' is the format that you want to change it to. The result of this query will be the current date in the format 'DD-MON-YY'. You can replace sysdate with any other date value that you want to format.

Best Oracle Database Books To Read in October 2024

1
Oracle Database 12c DBA Handbook (Oracle Press)

Rating is 5 out of 5

Oracle Database 12c DBA Handbook (Oracle Press)

2
Oracle PL/SQL by Example (The Oracle Press Database and Data Science)

Rating is 4.9 out of 5

Oracle PL/SQL by Example (The Oracle Press Database and Data Science)

3
Oracle PL/SQL Programming: Covers Versions Through Oracle Database 12c

Rating is 4.8 out of 5

Oracle PL/SQL Programming: Covers Versions Through Oracle Database 12c

4
Expert Oracle Database Architecture: Techniques and Solutions for High Performance and Productivity

Rating is 4.7 out of 5

Expert Oracle Database Architecture: Techniques and Solutions for High Performance and Productivity

5
OCA Oracle Database SQL Exam Guide (Exam 1Z0-071) (Oracle Press)

Rating is 4.6 out of 5

OCA Oracle Database SQL Exam Guide (Exam 1Z0-071) (Oracle Press)

6
Oracle Database 12c SQL

Rating is 4.5 out of 5

Oracle Database 12c SQL

7
Modern Oracle Database Programming: Level Up Your Skill Set to Oracle's Latest and Most Powerful Features in SQL, PL/SQL, and JSON

Rating is 4.4 out of 5

Modern Oracle Database Programming: Level Up Your Skill Set to Oracle's Latest and Most Powerful Features in SQL, PL/SQL, and JSON

8
Oracle Database Administration: The Essential Refe: A Quick Reference for the Oracle DBA

Rating is 4.3 out of 5

Oracle Database Administration: The Essential Refe: A Quick Reference for the Oracle DBA

9
Practical Oracle SQL: Mastering the Full Power of Oracle Database

Rating is 4.2 out of 5

Practical Oracle SQL: Mastering the Full Power of Oracle Database


How to display date formats in reports generated by Oracle?

To display date formats in reports generated by Oracle, you can use the TO_CHAR function to format the date according to your desired format. Here's an example of how you can use the TO_CHAR function to format a date in an Oracle report:

1
2
SELECT TO_CHAR(SYSDATE, 'MM/DD/YYYY HH24:MI:SS') AS formatted_date
FROM dual;


In this example, SYSDATE is the current system date, and 'MM/DD/YYYY HH24:MI:SS' is the format specified for the date. You can customize the format to display the date in any desired format.


You can include the TO_CHAR function in your SELECT statement when generating reports in Oracle to display dates in the desired format.


How to display dates in specific formats while querying data in Oracle?

In Oracle, you can use the TO_CHAR() function to display dates in specific formats while querying data. Here is an example of how you can use this function to display dates in different formats:

  1. Display date in 'DD-MM-YYYY' format:
1
SELECT TO_CHAR(date_column, 'DD-MM-YYYY') FROM table_name;


  1. Display date in 'MM/DD/YYYY HH:MI:SS AM' format:
1
SELECT TO_CHAR(date_column, 'MM/DD/YYYY HH:MI:SS AM') FROM table_name;


  1. Display date in 'Day, Month DD YYYY' format:
1
SELECT TO_CHAR(date_column, 'Day, Month DD YYYY') FROM table_name;


  1. Display date in 'YYYY/MM/DD HH24:MI:SS' format:
1
SELECT TO_CHAR(date_column, 'YYYY/MM/DD HH24:MI:SS') FROM table_name;


You can also use different formatting options such as 'HH' for 24-hour format, 'MI' for minutes, 'SS' for seconds, 'AM' for AM/PM indication, etc. Refer to the Oracle documentation for a complete list of formatting options.


What is the best practice for maintaining date formats in Oracle databases?

The best practice for maintaining date formats in Oracle databases is to use the TO_DATE function to explicitly convert date strings into the desired date format when inserting or updating data. This helps to ensure consistency in date formatting and avoid any potential issues with different date formats.


Additionally, setting the NLS_DATE_FORMAT parameter at the database level can help to enforce a specific date format for all sessions accessing the database. This can be done using the ALTER SESSION command or by setting the parameter in the initialization file.


It is also important to document and communicate the agreed upon date format conventions to all stakeholders involved in managing and querying the database to ensure consistency and avoid any confusion.


Overall, the key is to establish and adhere to a standardized approach for date formatting and conversion within the Oracle database to maintain data integrity and consistency.


What is the role of NLS_DATE_FORMAT parameter in Oracle?

The NLS_DATE_FORMAT parameter in Oracle specifies the default date format to use when displaying dates as strings. It affects the way dates are displayed in SQL queries, PL/SQL code, and other Oracle tools and applications. The NLS_DATE_FORMAT parameter allows you to customize the date format to meet the requirements of your application or users. By setting this parameter, you can control the order and format of elements such as day, month, and year in your date strings.

Facebook Twitter LinkedIn Whatsapp Pocket

Related Posts:

To convert a JSON date to an Oracle date in local time, you can follow these steps:Parse the JSON date string and extract the year, month, day, hour, minute, and second values.Use the TO_TIMESTAMP function in Oracle to convert the extracted values into a times...
To convert a 12-hour format time to a 24-hour format in Swift, you can use the DateFormatter class. First, create a DateFormatter instance and set the date format to match the 12-hour time format ('h:mm a'). Next, use the date(from:) method to convert ...
In Oracle SQL, you can convert partial dates by using the TO_DATE function along with the appropriate date format. To convert a partial date like '10/2021' to a full date, you can use the following query: SELECT TO_DATE('01/' || '10/2021&#3...