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Oracle SQL TUTORIAL – Date columns with Time in Where condition
 
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In this video, we will see how to retrieve records for a specific time duration. SQLs used in this video are given below. select * from employees; alter session set nls_date_format = 'DD-MON-YYYY HH24:MI:SS'; SELECT DBMS_RANDOM.VALUE(0,9) FROM DUAL; SELECT SYSDATE-DBMS_RANDOM.VALUE(0,9) FROM DUAL; SELECT FIRST_NAME,LAST_NAME, SYSDATE-DBMS_RANDOM.VALUE(0,9) CREATED_DATE FROM EMPLOYEES; CREATE TABLE EMP_TEST AS SELECT FIRST_NAME,LAST_NAME, SYSDATE-DBMS_RANDOM.VALUE(0,9) CREATED_DATE FROM EMPLOYEES; SELECT * FROM EMP_TEST ORDER BY CREATED_DATE DESC; select sysdate from dual; select sysdate,trunc(sysdate) from dual; 26 sep 2018 00:00:00 to 26 sep 2018 23:59:59 select sysdate,trunc(sysdate),trunc(sysdate)+0.99999 from dual; Records that got created yesterday.. 25 sep 2018 00:00:00 to 25 sep 2018 23:59:59 select trunc(sysdate-1),trunc(sysdate-1)+0.99999 from dual; SELECT * FROM emp_test WHERE created_date BETWEEN trunc(SYSDATE-1) AND trunc(SYSDATE-1)+0.99999 order by created_date; Retrieve records for 22nd Septembter 2018 SELECT * FROM emp_test WHERE created_date BETWEEN to_date('22-sep-2018 00:00:00','dd-mon-yyyy hh24:mi:ss') AND to_date('22-sep-2018 23:59:59','dd-mon-yyyy hh24:mi:ss') order by created_date; SELECT * FROM emp_test WHERE created_date BETWEEN to_date('22-sep-2018','dd-mon-yyyy') AND to_date('22-sep-2018 23:59:59','dd-mon-yyyy hh24:mi:ss') order by created_date; -- Get all records created in last 24 hours select sysdate,sysdate-1 from dual; SELECT * FROM emp_test where created_date between sysdate-1 and sysdate order by created_date;
Views: 77 Ganesh Anbarasu
Oracle TO_TIMESTAMP_TZ Function
 
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https://www.databasestar.com/oracle-timezone-functions/ The Oracle TO_TIMESTAMP_TZ function can be confusing, but we’ll explain it in this video. This function allows you to convert a string value into a TIMESTAMP WITH TIME ZONE value. A TIMESTAMP WITH TIME ZONE value is a type of DATE, but has a few components: - A date, including day, month, and year - A time, including hours, minutes, and seconds - A time zone, which is the number of hours and minutes difference from GMT This is a useful data type because it allows you to store dates in different time zones, and allow users in other time zones to see the data in a way that makes sense to them. The time zone part is the difference from GMT. This means that a “+7:00” is 7 hours ahead of GMT (e.g. Bangkok) and “-5:00” is 5 hours behind GMT (e.g. US Eastern Standard Time). The syntax of the TO_TIMESTAMP_TZ function is: TO_TIMESTAMP_TZ ( input_string [, format_mask] [, nls_param] ) The input_string parameter is the string you want to convert. The format_mask is where you specify the format of the input_string parameter. This is so you can specify the input_string in a variety of formats, and just use this format_mask to indicate which format it is in. The nls_param parameter is another optional parameter, and allows you to specify the returning language of the month and day names. For more information on the Oracle TO_TIMESTAMP_TZ function, including the SQL used in this video, read the related article here: https://www.databasestar.com/oracle-timezone-functions/
Views: 87 Database Star
How to Use MySQL Date and Time Functions
 
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Follow this step by step easy tutorial to learn how to use MySQL date and time functions and see how to modify the time formats. Don't forget to check out our site http://howtech.tv/ for more free how-to videos! http://youtube.com/ithowtovids - our feed http://www.facebook.com/howtechtv - join us on facebook https://plus.google.com/103440382717658277879 - our group in Google+ There are various functions which can be used for calculating the date and time in MySQL but for the purpose of this tutorial we will use 3 primary functions for date and time each. For this tutorial, we will be using SQL YOG as an instance of MySQL.  Step 1- Current Date Let's start with MySQL date functions. For that write the following query: select curdate(); and press F5 to execute. It will show the current date of the system. Curdate is a short form of current date. Step 2-Changing date format Now if we want to view the date in a specific format, we can use a function called the date_format(). Write "date_format" function in a similar pattern as before, but this time inside the parentheses, we will write the date within single quotation marks and then specify the required format in single quotations after a comma. Here we are using W for week, M for Month and Y for years which are implicit format specified in the MySQL environment, and used with a percentage sign. The actual query would be: select date_format('2013-04-18','%W %M %Y'); Step 3- Viewing Name of the Day In MySQL date functions library, there is a method which can return the day name, when given the date as its perimeter. It is called "dayname" function. To use that, write dayname(), following the "select" keyword, and specify the date within single quotes inside the parenthesis. The query would be: select dayname('1998-04-25'); Step 4- Time Functions Now let's move on to mysql time functions First of all let's find out the current time. For that, we will write curtime(),which stands for the current time, and write the query in the same way as we did for the current date. Hence the query would be: select curtime(); Step 5- Changing time format Now let's see how we can change the format of the output. For that, use the time_format() function, as we did for the date format. Write the following query in the editor: select time_format('14:28:18','%h : %i : %s'); Over here, h, i and s are used for hours, minutes and seconds respectively. Step 6- Changing Time to Seconds In MyQL time functions library, there are various functions related to time. One of them which is widely used by programmers is the time_to_sec() function. This method changes the given time to seconds. To use this, write time_to_sec() and specify the time inside the parentheses within single quotes. In the Query Editor, write: select time_to_sec('14:28:18'); When we execute the query, we can see that the time being displayed is in seconds. Step 7- Date along with Time Lastly, to display the current date and time altogether, we can use now() function along with the select keyword. Write: select now(); in the query editor and execute it. And this was all about MySQL date & time functions.
Working with Date Functions and Date Formatting in Excel
 
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This video lesson is a response to two YouTube viewers who wanted my help to learn how to use Excel's Date Functions and Excel's Custom Formatting to reveal the results that they were expecting in each cell. For the first viewer: I demonstrate how to use the =DATE(Year(), Month()=9, DAY()) Function to create a date that is 9 moths after the starting date. For my second viewer, I show him how to create and apply a CUSTOM date format of yyyy-mm-dd - (Year, Month, Day) - to the DESTINATION cells when he uses Copy & Paste. This is a two step process as you will see in this video. Finally, I show you how to take advantage of the NETWORKDAYS() and WORKDAY() Functions in Excel - including an optional list of mandated Holidays in the USA. Please visit my online shopping website - http://shop.thecompanyrocks.com - to view all of my videos and to explore the many resources that I offer you. Danny Rocks The Company Rocks
Views: 111125 Danny Rocks
SQL GETUTCDATE function - how to use SQL GETUTCDATE function
 
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The SQL Server GETUTCDATE function returns the current UTC date and time. visit Dose for excel Add-In website: http://www.zbrainsoft.com/ Visit our channel: https://www.youtube.com/channel/UCI4bMWYzrBTs47KINXL92Kw
Using Date, Calendar and SimpleDateFormat in Java : javavids
 
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How to get current date, how to get current day from date, how to get next day, Gregorian Calendar class, Simple date format class, parsing Date, converting Date to String. Part of Java online video tutorials: http://www.javavids.com
Views: 40115 Jiri Pinkas
Dữ liệu lớn - Chương 10   Oracle Big Data
 
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Nguồn: http://youtu.be/1GU4Imbo6R8, uploaded by Oracle.
Views: 446 Victor OS

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