How can I compare two dates in Unix?

How do you find the difference between two dates in Unix?

  1. Provide valid time string in A and B.
  2. Use date -d to handle time strings.
  3. Use date %s to convert time strings to seconds since 1970 (unix epoche)
  4. Use bash parameter expansion to subtract seconds.
  5. divide by seconds per day (86400=60*60*24) to get difference as days.
  6. ! DST is not taken into account ! See this answer at unix.

13 мар. 2015 г.

How do you compare two string dates?

In Java, two dates can be compared using the compareTo() method of Comparable interface. This method returns ‘0’ if both the dates are equal, it returns a value “greater than 0” if date1 is after date2 and it returns a value “less than 0” if date1 is before date2.

How do I compare dates in bash?

Or use shell-connector bash function:

0(1)-release . You can also use mysql’s builtin function to compare the dates. It gives the result in ‘days’. Just insert the values of $DBUSER and $DBPASSWORD variables according to yours.

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What is Unix date format?

The Unix epoch is the time 00:00:00 UTC on 1 January 1970. There is a problem with this definition, in that UTC did not exist in its current form until 1972; this issue is discussed below. For brevity, the remainder of this section uses ISO 8601 date and time format, in which the Unix epoch is 1970-01-01T00:00:00Z.

How do you subtract time in Linux?

Subtract two rows (in Time format)

log | grep -v ZZZ | awk ‘{print $1 ” ” $2 “;” $3 “;” $9 “;” $11}’ > myfile. csv sed -i ‘1iDate;Time;From;To’ myfile.

How do you compare dates?

For comparing the two dates, we have used the compareTo() method. If both dates are equal it prints Both dates are equal. If date1 is greater than date2, it prints Date 1 comes after Date 2. If date1 is smaller than date2, it prints Date 1 comes after Date 2.

How can I get today date?

Get Current Date and Time: java. text. SimpleDateFormat

  1. import java.text.SimpleDateFormat;
  2. import java.util.Date;
  3. public class CurrentDateTimeExample2 {
  4. public static void main(String[] args) {
  5. SimpleDateFormat formatter = new SimpleDateFormat(“dd/MM/yyyy HH:mm:ss”);
  6. Date date = new Date();

How can I compare two dates in SQL query?

1 Answer

  1. We can compare two dates using equals to, less than, and greater than operators in SQL. …
  2. If you want to find the employees joined on April 28th, 2020 from employee table:
  3. You can use the less than and greater than operators in a similar way.

28 апр. 2020 г.

How do you compare two Epoch Times?

Goal is to compare 2 times, 1 from android device and the other provided from database server (in epoch), If one time is newer then the other, a value should be added (marked as new in a listview, newItem = true;).

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How do I get current date in bash?

To get the date in bash shell and add a date, you can use the GNU date command as date -d ‘Feb 12 +1 day’ +%F which will output 2020-02-13 .

How do you do if else in bash?

If the TEST-COMMAND evaluates to True , the STATEMENTS1 will be executed. Otherwise, if TEST-COMMAND returns False , the STATEMENTS2 will be executed. You can have only one else clause in the statement.

What is the epoch date today?

Today’s Date in Various Date Formats

Date Format Date
RFC 2822 Mon, 29 Mar 2021 10:28:31 -0700
Unix Epoch 1617038911
YYYY-MM-DD 2021-03-29
YYYY-DD-MM 2021-29-03

What timestamp format is this?

Automated Timestamp Parsing

Timestamp Format Example
yyyy-MM-dd*HH:mm:ss 2017-07-04*13:23:55
yy-MM-dd HH:mm:ss,SSS ZZZZ 11-02-11 16:47:35,985 +0000
yy-MM-dd HH:mm:ss,SSS 10-06-26 02:31:29,573
yy-MM-dd HH:mm:ss 10-04-19 12:00:17

How do you display AM or PM in Unix?

Options Related to Formatting

  1. %p: Prints the AM or PM indicator in uppercase.
  2. %P: Prints the am or pm indicator in lowercase. Note the quirk with these two options. A lowercase p gives uppercase output, an uppercase P gives lowercase output.
  3. %t: Prints a tab.
  4. %n: Prints a new line.

10 апр. 2019 г.

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