Can we compare 2 dates in Oracle?

Comparing dates the wrong way

These Oracle date comparisons works, but no index cannot be used because date2 is invalidated with the trunc function (unless you create a function-based index on trunc(date2,’YYYY:MM’).

How can I compare two date formats in SQL?

In SQL, the date value has DATE datatype which accepts date in ‘yyyy-mm-dd’ format. To compare two dates, we will declare two dates and compare them using the IF-ELSE statement. We can declare variables easily by using the keyword DECLARE before the variable name.

What is Trunc in Oracle?

Purpose. The TRUNC (number) function returns n1 truncated to n2 decimal places. If n2 is omitted, then n1 is truncated to 0 places. n2 can be negative to truncate (make zero) n2 digits left of the decimal point.

How do I resolve ORA 01830?

This error can occur when you try to enter a date value without using the TO_DATE function. In Oracle, the default date format is generally DD-MON-YYYY. If you try to enter a date value that does not comply with this format, you need to use the TO_DATE function.

How do I fix not valid Month error in Oracle?

To fix the error, specify a month value that is valid such as “January”. Some conversion is built-in, and a value of “Jan” is also valid for the Month format code.

Where date is Sysdate?

The SYSDATE() function returns the current date and time. Note: The date and time is returned as “YYYY-MM-DD HH:MM:SS” (string) or as YYYYMMDDHHMMSS (numeric).

How do you compare date formats?

Steps involved: Create an object for SimpleDateFormat class initialising it with the format yyyy-mm-dd. Initialize the date variables using the above objects. Use compareTo() function of the date class for the comparisons of dates.

Can we compare date with string in SQL?

Date can be compared in sqlserver using string comparision: e.g. Show activity on this post.

How do I select month and year from date in SQL?

How to Get the Year and the Month From a Date in MySQL

  1. EXTRACT()
  2. YEAR()
  3. MONTH()

What is TRUNC () in SQL?

The TRUNC function replaces the value of its first argument with another value that has a smaller precision or the same precision. The TRUNCATE statement deletes all of the rows from a database table, without dropping the table schema.

What is the format of timestamp in Oracle?

The date format along with timestamp components : YYYY-MM-DD hh:mm:ss. YYYY-MM-DDThh:mm:ss. YYYY-MM-DD hh:mm:ss.

What is DD Mon RR in Oracle?

it means if you enter to_date( ’01-jan-40′, ‘dd-mon-rr’ ) Oracle will slide around the date based on the current year. In 1999 and 2001 — that would be the year 2040. As opposed to yy — where the century is based on the current date.

What is a valid month?

Valid months are: January, February, March, April, May, June, July, August, September, October, November, and December for format code MONTH. For the MON format code, valid month values are: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, and Dec.

What are date functions in SQL?

In MySql the default date functions are:

  • NOW(): Returns the current date and time.
  • CURDATE(): Returns the current date.
  • CURTIME(): Returns the current time.
  • DATE(): Extracts the date part of a date or date/time expression.
  • EXTRACT(): Returns a single part of a date/time.

What is date format in Oracle SQL?

Oracle stores dates in an internal numeric format representing the century, year, month, day, hours, minutes, seconds. The default date format is DD-MON-YY.

Can you compare date strings?

To compare two dates, you can use either toString() or valueOf() . The toString() method converts the date into an ISO date string, and the valueOf() method converts the date into milliseconds since the epoch.

How can I compare current date and date in Java?

util. Date , we can use compareTo , before() , after() and equals() to compare two dates.

How can I compare current date and date in SQL?

GETDATE() function: This function is used to return the present date and time of the database system.

After comparison column contains the following string:

  1. Lesser than- If the date is less than today’s date.
  2. Greater- If the date is greater than today’s date.
  3. Today- If the date is the same as today’s date.

Can you compare date with datetime in SQL?

The right way to compare date only values with a DateTime column is by using <= and > condition. This will ensure that you will get rows where date starts from midnight and ends before midnight e.g. dates starting with ’00:00:00.000′ and ends at “59:59:59.999”.

How do I get the month from a date in SQL?

To get a month from a date field in SQL Server, use the MONTH() function. This function takes only one argument – the date. This can be a date or date and time data type.

How can I get month from date column in SQL?

Use the MONTH() function to retrieve a month from a date/datetime/timestamp column in MySQL. This function takes only one argument – either an expression which returns a date/datetime/ timestamp value or the name of a date/datetime/timestamp column. (In our example, we use the start_date column of date data type).

How do I TRUNC a date in SQL?

A) Truncate a date value using default format

  1. SELECT TO_CHAR( TRUNC(TO_DATE( ’04-Aug-2017 15:35:32 ‘, ‘DD-Mon-YYYY HH24:MI:SS’ )), ‘DD-Mon-YYYY HH24:MI:SS’ ) result FROM dual;
  2. RESULT ——————– 04-Aug-2017 00:00:00.
  3. SELECT TRUNC( SYSDATE, ‘MM’ ) result FROM dual;
  4. SELECT TRUNC( SYSDATE, ‘Q’ ) result FROM dual;

How do I round a date in SQL?

The ROUND() function is used to get the date rounded to the unit specified by the format model. It operates according to the rules of the Gregorian calendar. The specified date. The unit of measure to apply for rounding.

How do I pass a TIMESTAMP in SQL query?

Show activity on this post.

  1. to_timestamp() You need to use to_timestamp() to convert your string to a proper timestamp value: to_timestamp(’12-01-2012 21:24:00′, ‘dd-mm-yyyy hh24:mi:ss’)
  2. to_date()
  3. Example.
  4. Note.

How do I show a TIMESTAMP in SQL?

The CURRENT_TIMESTAMP function returns the current date and time, in a ‘YYYY-MM-DD hh:mm:ss.