Asking for help, clarification, or responding to other answers. Optional. select *, cast ( (cast (begin_date as date) - cast (end_date as date) YEAR) as decimal (3,2)) AS year_diff from x. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. ISOWEEK: Uses ISO 8601 week boundaries. MySQL Dates between Dates. DATEDIFF() is a function found in SQL Server and MySQL that calculates and returns the difference between two date values. Functions that expect date values usually accept datetime values and ignore the time part. A time zone. The MySQL PERIOD_DIFF function returns the difference in months between two periods (formatted as YYMM or YYYYMM). ISO weeks begin on Monday. Date with caution. The YEARWEEK function may return a year value that is different than the year displayed in the date_value because of the mode specified. Specifies what day the week starts on. 19, the YEAR (4) data type with an explicit display width is deprecated and you should expect support for it to be removed in a future version of MySQL. Di tutorial ini, saya tidak akan membahas satu per satu. The BETWEEN operator is inclusive: begin and end values are included. Working With Time Zones. A date value is treated as a datetime with a default time part '00:00:00'. I strongly recommend you change this; it slows down any date computations you want to do and you risk invalid date values getting entered into the column. The recommended way to install MySQL on Microsoft Windows is to use the MySQL Installer; see MySQL Installer Method on how to download and run the MySQL Installer. PostgreSQL - Date Difference in Months. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. g. The difference is then passed to the FROM_DAYS() function that calculates the time span of the date difference in the YYYY-MM-DD format. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. Returns datetime_expr2 − datetime_expr1, where datetime_expr1 and datetime_expr2 are date or datetime expressions. 2 Answers. Each day is 1 integer. Specifically, it gets the difference between 2 dates with the results returned in date units specified as years, months days, minutes, seconds as a bigint value. これまで2年超、業務でPostgreSQL (9. it returns the difference in days if datepart is day. The first step would be to calculate the length of all movie rentals. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. For learning how to use DATEDIFF in MySQL, go to its tutorial here. title as Title, DATEDIFF (CURDATE (),Books. Syntax. The DATEDIFF function will return the difference count between two DateTime periods with an integer value whereas the DATEDIFF_BIG function will return its output in a big integer value. The accepted answer didn't work for me in MySQL 5. runTime, INTERVAL 20 MINUTE) < NOW () NOTE: this should work if you're using MySQL DateTime format. Use a proper datetime type instead. As for comparing, you could compare dates that are the first days of those years and months, or you could convert the year/month pair into a number suitable for comparison (i. Arguments. The following example uses the DATEDIFF() function to compare the requested delivery date with the ship date in days and return if the order is on-time or late:. Here is an example that uses date functions. date: This is the date or datetime value from which you want to get the year. 1. SQL 2022-03-27 19:30:32 concat column value of same user in mysql SQL 2022-03-27 19:05:02 sql developer sql worksheet not showing SQL 2022-03-27 18:45:07 kill a pid redshiftLearn the syntax of the datediff function of the SQL language in Databricks SQL and Databricks Runtime. All functions can be used in both the load script and in chart expressions. The MySQL PASSWORD function is used for the generation of a hashed password using a plain-text password string It uses hashing techniques to generate the hashed password. The TIMESTAMPDIFF () function will then return the difference in the unit specified. MySQL's DATEDIFF function just takes two parameters: SELECT orderNumber, DATEDIFF (shippedDate, orderDate) AS day FROM datenumtest; Note the order of the date parameters used, which would return some positive number of days assuming that the shipping date be greater than the order date. If you are running MySQL 4. Let's break it down. one of the following could be used when comparing dates in MySQL: DATEDIFF () Subtract two dates TIMEDIFF () Subtract time TIMESTAMPDIFF () Subtract an interval from a datetime expression PERIOD_DIFF () Return the number of months between periods. 8494441'. QlikView date and time functions are used to transform and convert date and time values. Introduction. Then when you call with: select * from dbo. 17. Edit the SQL Statement, and click "Run SQL" to see the result. 1. The DATE type is used for values with a date part but no time part. Can be one of the following: 0 - First day of week is Sunday. Using your sample: SELECT CASE WHEN datediff (year, date_column, getdate ()) > 1 THEN datediff (year. Can be one of the following: 0 - First day of week is Sunday. 7 Date and Time Functions. If you omit the password value following the --password or . Finding the seconds difference can be done as follows: SELECT (mod_date_time - create_date_time) * 24 * 60 * 60 as "seconds_diff" FROM t1. Select period_diff (concat (year (d1),if (month. 1 Answer. The first date is the later and the second is the earlier date (flipping them the other way around will return a negative value). The result what I want is 2 months and not 1 month or 1 month 14 days. It does seem to be smarter than a simple diff/365. frame (dif = as. Selengkapnya dapat dilihat di dokumentasi resmi MySQL. Where a time stamp is a numerical value representing the number of milliseconds from '1970-01-01 00:00:01' UTC (epoch) to the specified time. DATE_ADD. If the date is zero, the YEAR () function returns 0. 定义和用法. You are not following the example from the Carbon Documentation. SELECT year (dt2) FROM `dt_tb`. Syntax DATEDIFF ( date1, date2) Parameter Values Technical. . MySQL :: MySQL 5. MySQL Database: Restore Database. This function takes two arguments: The end date. SQLite does not have a storage class set aside for storing dates and/or times. The age computation takes into account leap years. The DATEDIFF function calculates only the date portion, ignoring the time portion in the column. TEXT as ISO8601 strings ("YYYY-MM-DD HH:MM:SS. numeric (dif)) sqldf ("select * from DF1") ## dif ## 1 1. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Introduction. UNIT can be SECOND. MySQL DATEDIFF is used to find the difference between the specified dates. 48. MySQL には、年齢の計算や日付の一部の抽出など、日付の計算に使用できる関数がいくつか用意されています。. A date value is treated as a datetime with a default time part '00:00:00'. Tutorial. Introduction. The DATE, DATETIME and TIMESTAMP datatypes in MySQL are used to store the date, date and time, time stamp values respectively. The MySQL DATEDIFF () function allows you to count the number of days between two different date expressions. Interprets an INT64 expression as the number of days since 1970-01-01. SELECT TIMEDIFF ('2007-12-31 10:02:00','2007-12-30 12:01:01'); -- result: 22:00:59, the difference in HH:MM:SS format SELECT TIMESTAMPDIFF (SECOND,'2007-12-30 12:01:01','2007-12-31 10:02:00'); -- result: 79259 the difference in seconds. )Table 12. Required. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. (In our example, it’s the purchase_date column. MySQL is an open-source relational database management system. Full years between start_date and end_date, and. One of the many unwritten Rules about Relational databases - Dates have no format. MySQL Database: Restore Database. In SQL SERVER, you can use the following query (replace the date with your field): SELECT CASE WHEN datediff (year, '20120303', getdate ()) > 1 THEN datediff (year, '20120303', getdate ()) ELSE datediff (day, '20120303', getdate ()) END AS Diff. 何かとデータが必要になる時に、日付指定とかと格闘することとなると思います。 少なくとも私は、毎度忘れては調べの繰り返しでした。 少しでも誰かのお役に立てたら幸いです。Discussion: To count the difference between dates, use the JULIANDAY() function, which counts the number of days since noon in Greenwich on November 24, 4714 B. For both DATEDIFF and minus sign: Output values can be negative, for example, -12 days. In Oracle, dates are just numbers. YYYYMM or YYMM. Hive DATEDIFF function is used to calculate the difference between two dates. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Return the current time. String data types. TIMESTAMP - format: YYYY-MM-DD HH:MI:SS. In SQL Server, you can use DATEDIFF function to get the datetime difference in specified units. Mysql PERIOD_DIFF () Function. In this tutorial, we collect the FULL LIST of MySQL Data Types in 2023 ( String, Numeric, Dates, Spatial, JSON) Check for examples and useful tips!The MySQL BETWEEN Operator. Add 10 days to a date and return the date: SELECT DATE_ADD("2017-06-15", INTERVAL 10. 시간차이 계산: TIMESTAMPDIFF(시간표현단위, 시작체크시간, 종료체크시간) 그런데 위와 같이 하면 문자열을 바로. MySQL filter results by month and year. DATEDIFF calculation between specific days without years. Parameter 1 - unit, it is a type of output you want, such as MICROSECOND, SECOND MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, YEAR. Above MySQL query has been tested and verified. Access a full range of deployment options from edge to cloud. No other values for basis are valid when computing a person’s age. 0 does not support the 2-digit YEAR (2) data type permitted in older versions of MySQL. START TRANSACTION; --statement1 UPDATE bankaccounts SET funds=funds-100 WHERE accountno='ACC1'; --statement2 UPDATE bankaccounts SET funds=funds+100 WHERE accountno='ACC2'; --statement3 ROLLBACK; --statement4. The TIMESTAMPDIFF function allows its arguments to have mixed types e. 2. We learned with examples, how to get information. One may be a date and another is datetime. Instead, use YEAR without a display width, which has the same meaning. 25; You might want to truncate result of above query to two decimal places. e. The next example will show the differences between two dates for each specific datapart and abbreviation. Caveat: I work mostly with MS SQL and haven't worked with MySQL in a long time, so you may need to tweak the above. SELECT year (dt2) FROM `dt_tb`. To find out your SQL Server start of the week you can use @@DATEFIRST by running this: select @@DATEFIRST -- default US English = 7 (Sunday) You could change your calculation to work on days rather than weeks and dividing by 7 to get a more accurate value, which you can round as you please: MySQL: SQL Fiddle Demo. Date values are interpreted as DateTime with the time part set to 00:00:00 by default. 1. The DATEDIFF function has two arguments; we specify the dates for which we want to find the difference. this will give you the first of the month for a given date. Each DateTime instance refers to a specific millisecond of the Unix epoch. Where a time stamp is a numerical value representing the number of milliseconds from '1970-01-01 00:00:01' UTC (epoch) to the specified time. from this previous question How to calculate age in T-SQL with years, months, and days you can do procedure like this. The result returned is the number of months between those periods. checkdate; date_ add; date_ create_ from_ formatSelect * from employee where e_name LIKE 'j%'; After writing the query, click on the execute button to check for errors. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. TIMEDIFF () is essential for time-based analysis by enabling you to measure the duration of events or actions. , begin is a DATE value and end is a DATETIME value. Example 1 : Getting the differences between two specified time values where the time is specified in the format of YYYY-MM-DD HH-MM-SS. Click Mapping and select the customer checkbox. Teams. Class java. Let us walk through them quickly: To calculate the difference between dates in days – SELECT DATEDIFF (`DATE-A`, `DATE-B`) FROM `TABLE`. Second parameter would be the last login time, which is already in the database. 0. 1. Collectives™ on Stack Overflow. In MySQL, DATEDIFF function, takes only two arguments: end date and start date: DATEDIFF(NOW(), P. The age computation takes into account leap years. DATEDIFF: Returns the number of units (unit specified in Interval) between the input two dates. At any rate, try this: WHERE specific_date <= DATE_ADD (NOW (), INTERVAL 5 DAY) This is a good way to do such a lookup. 6, MySQL 5. MySQL TIMESTAMPDIFF() Function - The DATE, DATETIME and TIMESTAMP datatypes in MySQL are used to store the date, date and time, time stamp values respectively. SELECT * FROM players WHERE DATE(us_reg_date) BETWEEN '2000-07-05' AND '2011-11-10' But if you want to take advantage of an index on the column us_reg_date you might want to try this. Required. Every time you establish a connection to the MySQL database, you should switch the time zone to UTC, which can be done with the following SQL statement: SET TIME_ZONE = '+0:00'. Week where Monday is the first day of the week (01 to 53). This function is carried out by the authentication system. SELECT * from student_dates_3 WHERE stu_date > '2001-01-16'; As we can see here, we are using the WHERE clause and comparing the dates of each student with the date 2001-01-16. However the documentation states nothing about the correctness of this or how it calculates the difference. . Parameter 3 - End Date or Datetime Values. TIMESTAMPADD () This function adds an interval to a datetime expression. 25 then it will return number of years in decimal places. DBDiff. Q&A for work. Improve this answer. For DATEDIFF: date_or_time_expr1 and date_or_time_expr2 can be a date, time, or timestamp. 1. end_date: The date to which you want to calculate the difference. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. this will be add to 1900-01-01 , but only the months. Alternatively, you can use TIMEDIFF (ts1, ts2) and then convert the time result to seconds with TIME_TO_SEC (). UNIT can be SECOND MINUTE HOUR DAY WEEK. Periods should be in the same format i. Select datediff ( max (hire), min (hire)) as Difference From Employees Where terminated is null. YEARS > 0 THEN CAST( RADHE. DATE () Extract the date part of a date or datetime expression. Difference between OLTP and Inmon Data Warehouse. The default column name for the DATEDIFF function is DATE_DIFF. For example: SELECT DATEDIFF(day, '2018-03-13', GETDATE()) AS "Difference in days";@NoChance The only caveat is that if you're using an INTEGER column for date/time (which must be epoch time as per docs), then you'd have to use the unixepoch modifier, e. Microsoft Windows. unix (1318781876); This is implemented as moment (timestamp * 1000), so partial seconds in the input timestamp are included. It then subtracts the second date from the first. Syntax DATEDIFF ( date1, date2) Parameter Values Technical. is_leap_year else 365 def num_years (start_date:. I've done a bit of research and all i can find is how to ind the difference b. TIMESTAMPDIFF () This function subtracts an interval from a datetime expression. This will collect the year part from the field. // Calculate the age from a given birth date // Example: GetAge("1986-06-. DATEDIFF() or BETWEEN for Date Ranges in SQL Queries. DATE_FORMAT () Format date as specified. SubscrpEndDate__c) AS 'SubscriptionDueDate' According to the manual: DATEDIFF(expr1, expr2) returns expr1 − expr2 expressed as a value in days from one date to the other. It is not necessary that both the expression are of the same type. To get the difference in hours, choose. それぞれのペットが何歳なのかを判別するには、 TIMESTAMPDIFF () 関数を使用します。. They are grouped into five main categories: Numeric data types. It's a. If I understand your comments on the previous answers, the date-of-birth column is not actually a DATE value but a string in the format m/d/y. The following query selects all rows with a date_col value from within the last 30 days: . MySQL is. This function is particularly useful when dealing with data that involves comparing or calculating differences between year-month intervals. There are many ways to get current year from MySQL, you just have to extract it using YEAR () function like this: SELECT YEAR (NOW ()); NOW () returns todays date + time in this format 'YYYY-MM-DD HH:MM:SS' so with YEAR (), you're just taking the year value from NOW (). Used with %x. 5 日付の計算. com. There are no user contributed notes for this page. What I'am doing wrong The messure is the folowing YearMonths = VAR Days = DATEDIFF(max('produccion agency'[hire_date]),TODAY(),DAY) VAR Months = ROUNDDOWN(Days/31,0) VAR Years = ROUNDDOWN(Mo. I am trying to build a query that will load records from and to specific date comparing 2 fields - the start_time and the end_date. Used with %X. The following MySQL WHERE IN query gives rows where membership_number is either 1 , 2 or 3. Parameter 3 - End Date or Datetime Values. In the above example, the CURDATE () function took the. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. The first date is adjusted by adding 1 year, and the second date is adjusted by adding 1 month. To determine how many years old each of your pets is, use the TIMESTAMPDIFF () function. Date manipulation is done using the builtin date/time functions, which know how to convert inputs from the other formats. Only the date parts of the values are used in the calculation. Used with %x. 25) as 'years-count' from mytableofdates. Hope. Introduction to MySQL TIMEDIFF () function. The DATEDIFF function returnes the number years, months, weeks, or days between two dates. What this allows you to do is pass in two TIMESTAMP or DATETIME values (or even DATE as MySQL will auto-convert) as well as the unit of time you want to base your difference on. Learn how to extract, compare, and calculate timestamps for effective data querying. g. SQL provides super key, primary key, candidate key, alternate key, foreign key, compound key, composite key, and surrogate key. 3. It can be one of the following formats: Year: year, yyyy, yy Discussion: Use the DATEDIFF () function to retrieve the number of days between two dates in a MySQL database. Here is an example that uses date functions. g. MySQL Dates between Dates. Without using the DATE () function, then MySQL will also compare the time portion of the column with your string expression. DAY; WEEK: Begins on Sunday; WEEK(<WEEKDAY>): Begins on <WEEKDAY> where WEEKDAY can be SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, and SATURDAY. Follow answered Feb 14,. TIMESTAMP () With a single argument, this function returns the date or datetime expression. Add a comment. var day = moment. MySQL Data Types (Version 8. MySQL TIMESTAMPDIFF Function with Examples. MySQL DBA MySQL DBA. Example: In this example, we will calculate a number of months between two specific dates using. Since all dates will now be saved. Read on to learn more about each group and see which data types they include. mysql> SELECT something FROM tbl_name-> WHERE DATE_SUB(CURDATE(),INTERVAL 30 DAY) <= date_col;. 4. Most public APIs are compatible with mysqlclient and MySQLdb. (In our example, it is the column start_datetime of the date data type. Group count results by month. It stores these values as NUMERIC or TEXT typed values depending on input format. If the year diff has to be counted this way then use: EXTRACT (YEAR FROM date_to) - EXTRACT (YEAR FROM date_from) Just. The difference between startdate and enddate is expressed in days. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. Calculating the difference in years: SELECT CONCAT (first_name, ' ', last_name) AS full_name, employment_date, FLOOR (DATEDIFF. 15 between 2 values that are 1 year, 1 month and 15 days apart. This MariaDB tutorial explains how to use the MariaDB DATEDIFF function with syntax and examples. Is there any way to find the month difference in PHP? I have the input of from-date 2003-10-17 and to-date 2004-03-24. Second parameter would be the last login time, which is already in the database. Here is my trigger:. If you prefer short options, the command looks like this: $> mysql -u finley -p db_name. Sorted by: 71. The two expressions don’t have to be of the same type. Example 4. These changes are driven by the fact that technology is advancing (machines have more CPUS, use SSDs and so on), more data is being stored, MySQL is evolving (InnoDB, Group Replication, AdminAPI), and so on. Set @monthDiff = ABS(DATEDIFF(MONTH, @FromDate, @ToDate)%12) Set @yearDiff = ABS(DATEDIFF(YYYY, @FromDate, @ToDate)) -- If the From date month is greater than the month of the To date and the year. Syntax:datediff function. The DATEDIFF() function calculates the number of days. DatePart. The basic syntax of the TIMESTAMPDIFF Function is as shown. See the following example:Try the below SQL QUERY for finding Year difference between two dates using DATEDIFF function. Try the functions years_add (timestamp date, int years) or years_sub (timestamp date, int years) which are mentioned in cloudera's latest documentation. It's a useful function for performing date-based calculations and obtaining insights into the duration between two points in time. That is SQL Server syntax for converting a date to a string. 5 Date Calculations. MySQL TIMESTAMPDIFF function is one of the Date methods, which is useful to find the interval difference between two dates or DateTime expressions. Here’s a quick rundown of the functions you can use in MySQL:. 3, “Date and Time Literals”. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. The MySQL AND, OR and NOT Operators. 1. todate, t. No other values for basis are valid when computing a person’s age. 6. MySQL DATE_ADD() Function MySQL Functions. SELECT ((DATEDIFF('2022-01-02', '2021-12-30'))+1 - ((WEEK('2022-01-02') - WEEK('2021-12-30')) * 2) - (case when weekday('2022-01-02') = 5 then 1 else 0 end) - (case when weekday('2021-12-30') = 4. The following table lists all the valid datepart values. It has a range of 1000 and 9999. It supports time series analysis by allowing you to calculate. Here are the MSDN docs on addition and subtraction. In this article, we used the LAG () window function to calculate year-to-year and month-to-month differences. MySQL Data Types. This effectively means that MySQL date-functions are useless to you. If the date is zero, the YEAR () function returns 0. orders table as in Example 3, we can use DATEDIFF () to find the interval between today's date and the date on which an order is placed. Here is the main query to get the year part from MySQL date and time field. For example, if DATETIMEDUE is 2014-10-19 23:59:59 and the current time is 2015-01-19 20:00:00, and you ask for the difference in months, the. datepart The units in which DATEDIFF reports the difference between the startdate and enddate. 3. Share. Here’s an example where I use DATEDIFF () to return the number of days between two dates, and then the number of years between the same two dates. SELECT column_name(s) FROM table_name WHERE column_name BETWEEN value1 AND value2;EXPLANATION: In this example, the MySQL DATEDIFF() function calculates the number of days between the two dates 2023-03-07 and 2023-03-01, but with an interval adjustment. The TIMESTAMPDIFF() function will then return the difference in the specified unit. DATEDIFF accepts either. 2 - First day of week is Sunday. Definition and Usage The DATEDIFF () function returns the number of days between two date values. There many different data types you can store in a MySQL table. I would recommend using 365. This MySQL tutorial explains how to use the MySQL PERIOD_DIFF function with syntax and examples. Got this script from net (thanks to coffeecupweb) <?php /** * Simple PHP age Calculator * * Calculate and returns age based on the date provided by the user. (In our example, it’s the expiration_date column. So if there are two dates separated by one day, the year difference can be 1 (see select datediff (year, '20141231', '20150101') ). DATE_SUB. The following table summarizes the difference between these two functions: TIMEDIFF () TIMESTAMPDIFF () Requires 2 arguments. In SQL, keys are the set of attributes that used to identify the specific row in a table and to find or create the relation between two or more tables i. g. sql. MySQL :: MySQL 5. The following illustrates the syntax of the DATE_ADD function: DATE_ADD (start_date, INTERVAL expr unit); Code language: SQL (Structured Query Language) (sql) The DATE_ADD function takes two arguments: start_date is a starting DATE or. DEMO: Select date from Calendar to execute YEAR () →. The output is then either a. NET Data Providers. Function will return number of days between startdate and enddate. You can only store dates as numbers or text. DATE_FROM_UNIX_DATE. The unit argument can be MICROSECOND, SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, or YEAR. Try this one: select * from MyTab T where date_add (T. answered Nov 8, 2015 at 10:51. 68 sec) Insert values for all fields using insert command. You can just subtract datetimes and it will return the value: select (now () - interval 2 day) - (now () - interval 5 day); The result isn't a datetime (it's some decimal coded date -- 3000000 for three days in this case), but it isn't correct to say consider a datetime and an interval as the same datatype. Use this for legacy code (PHP < 5. For this, these must only be stored as permitted data values. Another simple way to cast the string to dateType in spark sql and apply sql dates and time functions on the columns like following : . e keys identify the rows by combining one or more columns. Date/Time Functions. Mysql count query by Grouping Year and Month horizontal. Functions that expect time values usually accept datetime values and ignore the date part. Supports some migration tools. Found this function, but it wont work. Application. As of MySQL 8. Here’s a quick rundown of the functions you can use in MySQL:. Commonly used datepart units include month or second. e. sql sql 按照精确的年份减去一年 在本文中，我们将介绍如何使用sql在日期中准确地减去一年。在某些情况下，我们可能需要对日期执行精确的减法运算，以获得准确的结果。下面将通过示例说明如何使用sql完成这个任务。 阅读更多：sql 教程 了解日期函数 在开始之前，让我们先了解一些常用的sql. The TIMEDIFF () function calculates the difference between two TIME or DATETIME values. MySQL timestampdiff function with examples is given below: 1. e. It is the unit in which the DATEDIFF () function returns the difference between a start date and an end date e. Follow. There should also be a YEAR(). It uses the. So to handle this type of control first we will fill date without separating with delimiter, i. 6 〜 11)を使ってきたのですが、最近これに加えてMySQL (5. For example, from 2/10/08 to 2/10/09 is considered one year, while 3/1/08 to 2/29/09 is considered zero years. 4. using datediff with 1 decimal for years. . 3. Days; This is possible via operator overloading. There many different data types you can store in a MySQL table. It is to be noted that two expressions must be the same type. DATEDIFF does not guarantee that the full number of the specified time units passed between 2 datetime values: -- Get difference in hours between 8:55 and 11:00 SELECT DATEDIFF (hh, '08:55', '11:00'); -- Returns 3 although only 2 hours and 5 minutes passed between times -- Get difference in months between Sep 30, 2011 and Nov 02, 2011. mysql> create table DateCreateDemo −> ( −> `Day` varchar(2), −> `Month` varchar(2), −> `Year` varchar(4) −> ); Query OK, 0 rows affected (1.