How to Truncate Yyyy/Mm/Dd Hh:mm:ss.sss to Mm/Dd/Yyyy In Oracle?

To truncate a date value from the format 'yyyy/mm/dd hh:mm:ss.sss' to 'mm/dd/yyyy' in Oracle, you can use the following query:

SELECT TO_CHAR(TRUNC(TO_DATE('yyyy/mm/dd hh:mm:ss.sss', 'yyyy/mm/dd hh24:mi:ss')), 'mm/dd/yyyy') FROM dual;

This query first converts the input date string to a date value using the TO_DATE function, and then truncates it to remove the time portion with the TRUNC function. Finally, it formats the result in the desired 'mm/dd/yyyy' format using the TO_CHAR function.

What is the function to truncate in Oracle?

In Oracle, the TRUNC() function is used to truncate a number or date to a specified number of decimal places or date part. The syntax for the TRUNC() function is as follows:

TRUNC(value, [decimal_places])

• value: The number or date value to be truncated.
• decimal_places: Optional parameter that specifies the number of decimal places to truncate the number to. If not specified, the number will be truncated to the nearest integer.

Example 1: Truncate a number to 2 decimal places SELECT TRUNC(123.456, 2) FROM dual; Output: 123.45

Example 2: Truncate a date to the nearest month SELECT TRUNC(SYSDATE, 'MONTH') FROM dual; Output: 2022-05-01

What is the purpose of truncating datetime in Oracle?

The purpose of truncating datetime in Oracle is to remove the time portion of the date/time value and return a truncated date or timestamp. This can be useful for performing date calculations or comparisons where only the date portion is relevant and the time component is not necessary. Truncating datetime values can also make it easier to group and aggregate data by date.

How to truncate a date format in Oracle?

To truncate a date format in Oracle, you can use the TRUNC function. This function allows you to truncate a date to a specified unit, such as year, month, day, hour, minute, etc.

Here is an example of how to truncate a date to the month in Oracle:

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SELECT TRUNC(SYSDATE, 'MM') AS truncated_date
FROM dual;

This query will return the current date truncated to the beginning of the month.

You can replace 'MM' with other units like 'YYYY' for year, 'DD' for day, 'HH' for hour, etc. to truncate the date to the desired unit.

How to handle date conversions in Oracle?

In Oracle, dates can be converted from one format to another using the TO_DATE and TO_CHAR functions.

To convert a string to a date, you can use the TO_DATE function with the appropriate format mask. For example:

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SELECT TO_DATE('2022-10-31', 'YYYY-MM-DD') FROM dual;

This will convert the string '2022-10-31' to a date value.

To convert a date to a string, you can use the TO_CHAR function with the appropriate format mask. For example:

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SELECT TO_CHAR(SYSDATE, 'DD-MON-YYYY') FROM dual;

This will convert the current date (SYSDATE) to a string in the format 'DD-MON-YYYY'.

You can also use the TO_TIMESTAMP and TO_TIMESTAMP_TZ functions for converting strings to timestamps and timestamp with time zone values respectively.

Remember to always specify the correct format mask when converting dates to avoid errors.