Postgres interval to seconds. Just the full > quantity of the seconds.

Postgres interval to seconds I assume you mean a timestamp. For example, if you round a timestamp down to the nearest minute using the 'minute' interval, any seconds or milliseconds within that minute will be truncated. 邏輯運算子; 9. It can be constructed literally, or by subtracting a TIMESTAMP value from another. Share. 要定义一个 PostgreSQL INTERVAL 类型的值，请使用如下法： SELECT date_trunc('second', now()::timestamp); date_trunc accepts various input for the the first argument "field". ‘p’ can be 0-6, but the type must include seconds. In the case you are trying to insert data in an interval column, you can use integer seconds and PostgreSQL will convert it to a interval. Instead, you can subtract dates or use the AGE() function to calculate differences in days, months, or years between two dates. Interval Syntax. Syntax. 1. Epoch returns the number of seconds. Well, the context will be how/where you use it. By default, CockroachDB displays INTERVAL values in the traditional PostgreSQL format (e. So a month in postgresql interval has 30 days. 5' * interval '1 hour' Positive values correspond to time zones east of UTC, negative values to zones west of UTC. I am trying to coerce that to a native postgres INTERVAL or TIME type so I can leverage the equivalent operators. First we have the bare bones of the PostgreSQL Interval, Date and Timestamp Data types. Syntax: Copy. interval '1 hour' * 3. g. 963179 secs juin 2, 2022, 12:00 AM | 0 years 0 mons 0 days 0 hours 2 mi time, timestamp, and interval accept an optional precision value p which specifies the number of fractional digits retained in the seconds field. ‘tz’ is a PostgreSQL short hand for ‘with Summary: This tutorial shows you how to use the PostgreSQL DATE_TRUNC() function to truncate a timestamp or interval to a specified precision. As a data type it just stores an integer value, but the most interesting thing about this data type is that when you cast any interval value (INTERVAL DAY TO SECOND i. I'm working with In this article, we would like to show you how to extract second(0-59) from DATE, TIMESTAMP, TIME or INTERVAL in PostgreSQL. I haven't find any function. 2 What about TIMESTAMP WITH TIME ZONE?; 4. Note: The number of fraction digits taken in the second field is known as the precision p. 7. '1 month 3 days'::interval - Postgres traditional format for interval input; Omitting the time zone leaves you at the mercy of the Postgres server’s timezone setting, the TimeZone configuration that can be you can append the units and then cast to interval. In some ugly cases with have a calculated interval inside of a calculated interval -- not nice. Introduction to the PostgreSQL MAKE_INTERVAL() function. SQL Server: -- Add 1 day to the current date November 21, 2012 SELECT DATEADD (day, 1, GETDATE ()); # 2012-11-22 17:22:01. In PostgreSQL, interval supports the following time period units or their plural forms: For example, you can have an interval with second precision up to microseconds (one-millionth of a second). E. Often in PostgreSQL you may want to convert a time interval to seconds. For example, age('2004-06-01', 1970-01-01 00:00:00, without regard to timezone or daylight-savings rules; for interval values, the total number of seconds in the interval The interval data type in PostgreSQL stores time periods using 16 bytes of storage and supports a range from -178,000,000 years to 178,000,000 years. , years, months, days, hours, minutes, etc. The interval type has an additional option, which is to restrict the set of stored fields by writing one of these phrases: PostgreSQL间隔数据类型用于存储和部署以年，月，日，小时，分钟，秒为单位的时间段。 我们使用了不同的 Interval函数，例如 NOW()，TO_CHAR()来增强特定表中的间隔值。 PostgreSQL间隔值具有输入和输出间隔格式。 我们可以借助 justify_days()，justify_hours，justify_interval()函数来调整PostgreSQL间隔值。 I'd > like to compute the difference between the two times in seconds, all in db: > > SELECT > (CAST(stop_time AS SECONDS) + 86400 - CAST(start_time AS SECONDS)) > % 86400; At a guess I'd say you should simply subtract the two (ie stop_time - start_time) and then use extract() to pull the seconds out. date '2024-03-31' - interval '1 month' yields 2024-02-29 (at least in Postgres), and date '2024-01-01' + interval '1 month' yields 2024-02-01 In my table results from column work_time (interval type) display as 200:00:00. session_id, m If you wanted postgres to handle the HH:MM:SS formatting for you, take the difference in epoch seconds and convert it to an interval scaled in seconds: SELECT SUM(EXTRACT(EPOCH FROM time. interval 运算符; 将 PostgreSQL 间隔值转换为 A PostgreSQL interval represents a span of time, consisting of years, months, days, hours, minutes, and even seconds. '1 month 3 days'::interval - Postgres traditional format for interval input; Omitting the 摘要：在本教程中，您将了解 PostgreSQL 的 interval 数据类型以及如何操作间隔值。 目录. In PostgreSQL, we can use the -operator to subtract one or more seconds from a time value. This function takes two arguments: the first is the end date and the second is the start date. 시간을 다루다보면 시간값에 다른 시간을 더하거나 빼서 범위를 체크하는 경우가 무수히 많다. or mycolumn * '1 second'::interval which will avoid reparsing the textual format over and over (although it doesn't make much practical difference in this case) – araqnid. Internally, PostgreSQL stores interval values as months, days, and seconds. Interval data types and literals can be used in datetime calculations, such as, adding intervals to dates and timestamps, summing intervals, and subtracting an interval from a date or timestamp. By “time” value, this could be an actual time value, a timestamp, SELECT date '2030-01-20' + time '01:00' + interval '18 seconds'; Result: 2030-01-20 01:00:18 Specified in Minutes. 11 month'; interval ----- 3 days 07:12:00 (1 row) Such an algorithm causes the The trick is to create a fixed interval and multiply it with the number of seconds in the column:. See for yourself: SELECT '10'::interval interval ----- '00:00:10' To clarify misinformation: CURRENT_DATE is just fine time, timestamp, and interval accept an optional precision value p which specifies the number of fractional digits retained in the seconds field. ISO 8601 间隔格式; PostgreSQL interval 输出格式; PostgreSQL 间隔相关的运算符和函数. Use the PostgreSQL AGE() function to retrieve the interval between two timestamps or dates. Using, say integers (number of seconds since epoch) to represent time, results in unwieldy SQL expressions and more application code. created@::timestamp at time zone 'America/Los_Angeles' - usr. Improve this answer. The PostgreSQL INTERVAL type occupies 16 bytes of storage, and its values range from -178000000 years to 178000000 years. Converting PostgreSQL interval to seconds produces wrong values. 1 Types; 4. You can use an interval data type to store durations of time in units such as, seconds, minutes, hours, days, months, and years. 005' form query above with a calculated process or from a field value From PostgreSQL v14 on, you can use the date_bin function for that: SELECT date_bin( INTERVAL '5 minutes', measured_at, TIMESTAMPTZ '2000-01-01' ), sum(val) FROM measurements GROUP BY 1; with intervals as (select * from interval_generator(NOW() - INTERVAL '24 hours' , NOW(), '30 seconds'::INTERVAL)) select f. create or replace function iso_interval_format(interval_in interval) returns interval language plpgsql as $$ begin set time、timestamp和interval接受一个可选的精度值 p，这个精度值声明在秒域中小数点之后保留的位数。缺省情况下，在精度上没有明确的边界。p允许的范围是从 0 到 6。. Syntax of PostgreSQL Interval data type. when the employee stopped doing that job) and the column start_date (when the employee started that job). PostgreSQL INTERVAL 语法. For example, if you want to know the time of 3 hours 2 minutes ago at the current time of last year, you can use the following As a previous answer points out, the trick is to convert the interval to an "epoch", that is, an absolute number of seconds, and then divide appropriately for absolute numbers of other units. 2。 （1）10進数との乗除算ができる select interval '1minute' * 100 Error: Time subtraction and conversion to the epoch (seconds) When interval type is converted to epoch, the algorithm may not match the expected one: (1 row) postgres=# select interval '0. '1 year 2 mons 3 days 04:05:00' DATE_TRUNC('second', INTERVAL '1 year 2 months 3 days 4 hours 5 minutes 6 seconds') pgsql-novice(at)postgresql(dot)org: Subject: how to convert a time interval to seconds? Date: 2006-09-12 14:39:25: Message-ID: 4506C69D. reviewed@t::timestamp at time Discussion. 4. interval '1 day' * 21 → 21 days. For an date or datetime value, this is the number 在 PostgreSQL 中， INTERVAL 类型用于存储时间间隔值，比如 N 年 N 月 N 日 N 时 N 分 N 秒。 时间间隔不是一个时间点，而是一个时间段。 PostgreSQL INTERVAL 类型占用 16 个字节的存储空间，其取值范围从 -178000000 years 到 178000000 years。. com: I searched how to convert a time interval to seconds but failed to find an example. Here’s the The INTERVAL type refers to the difference between two dates. use to_char() to format the interval value Without context, one month cannot be converted into seconds. Invalid input syntax for type interval in postgresql. You can use the EXTRACT and EPOCH statements to do so: SELECT *, FLOOR(EXTRACT(EPOCH You can use the interval as a data type for the column, or as a function to add the time period in the existing timestamp. 比較函式及運算子; 9. 428452 | 172800 | 2014-08-07 08:23:32. 005') AS work_timestamp from mytable How to change '5' or '00:00:00. 6 mons (1 row) postgres=# select interval '0. Postgres Interval Returns Decimal Numbers. If you want to emulate MySQL's time_to_sec function, you could use a function like this: RETURNS integer AS. Usage. interval类型有一个附加选项，它可以通过写下面之一的短语来限制存储的fields的集合： . EXTRACT(<field> FROM <interval>) In above syntax, <field> can be year, month, date, hour, minute, seconds etc. Syntax: month, date, hour, minute, seconds, etc from interval values. ). Here, the first query consists of the current date and we add an interval of 1 If you read this as a Mathematician. Our team has agreed to implement this technique throughout a project because it is more human readable to declare the unit of the interval (1 day) then multiply that interval by our (sometimes convoluted) SQL arithmetic. I want to convert the following wait_time column into seconds. Quick solution: SELECT EXTRACT('second' FROM "column_name") FROM "table_name"; postgresql は、期間を表す interval データ型を提供します。このデータ型は、年、月、日、時、分、秒などの時間単位を組み合わせて、期間を表現するために使用されます。interval データ型の構成interval データ型は、以下の要素で構成されます。 In Postgres, you can e. By default, there is no explicit bound on precision. Follow edited May 5 , 2018 So a year in a postgresql interval has 365 days. 234 │ └───────────┘ (1 row) Postgres INTERVAL using value from table. This can be useful when you need to time, timestamp, and interval accept an optional precision value p which specifies the number of fractional digits retained in the seconds field. More about the operators available for date and timestamp columns in the manual In PostgreSQL, the make_interval() function creates an interval from years, months, weeks, days, hours, minutes and seconds fields. Here, it would be arrival - departure. It takes 16 bytes of storage and ranges between -178000000 to +178000000 years. So by that logic, I am trying to calculate the number of seconds in the following interval: PostgreSQL では、interval 型を時間数に変換するために、以下の方法を使用できます。EXTRACT 関数を使用するEXTRACT(epoch FROM interval): interval の値を Unix エポック時間（秒単位）に変換します。 エポック時間を 3600 で除算して、時間数に変換します。 Syntax: 1. In general, the relationship between different intervals may not be well defined - a month can be different numbers of days depending upon which month (and year) is under consideration. You provide the years, months, weeks, days, hours, minutes and/or seconds fields, and it will return an interval in the interval data type. You can achieve this, in a single trip to the server by creating function which sets the InstervalStyle the echos back the input value. Follow answered Feb 13, 2019 at 14:30. Learn how to handle time durations effectively and create automated column calculations. select extract ('epoch' from '1 month'::INTERVAL); Produces the number 2592000. , in the postgresql newsgroup and the wiki. I'm trying to convert minutes which are in integer to interval in postgres. 5. start_time, m. PostgreSQL 's approach uses the month from the earlier of the two dates when calculating partial months. (see demo). Introduction to the PostgreSQL DATE_TRUNC() function. 位元字串函式及運算子 time、timestampおよびintervalは秒フィールドに保有されている小数点以下の桁数を指定するオプションの精度値であるpを受け付けます。デフォルトでは、明示的な精度に対する限界はありません。 pの許容範囲はtimestamp型とinterval型の場合は0から6です。 select current_time - interval '1' hour or to subtract one hour and 25 minutes: select current_time - interval '1:25' (note that you need to remove the hour keyword if you use an interval with hours and minutes) If you do want the date to be part of the result, just replace current_time with current_timestamp. Solution 2: Difference in Years, Months, Days, Hours, Minutes, and Seconds A PostgreSQL INTERVAL data type represents a duration of time, such as the time between two events, an event's duration, etc. intervalstyle cluster setting to a supported format (iso_8601 for the ISO 8601 format; sql_standard for the SQL I am pretty inexperienced in PostgreSQL and am trying to get a row returning an interval from the current datetime to a given datetime as weeks, days, hours, minutes, and seconds broken down into separate columns. interval [ fields ] [ (p) ] Explanation: p: defines the number of fraction digits that should remain in the seconds. (Technically, PostgreSQL uses UT1 because leap seconds are not handled. To see what it's doing a bit more clearly: digoal 德哥专栏 PostgreSQL 时间间隔如何转化为数值 - interval to numeirc OR (timestamp to numeric then mins) postgres=# select interval '0. day, hour, minute, second 등이 들어갈 수 있고 9. 字串函式及運算子; 9. By “time” value, this could be an actual time value, a timestamp, or an interval. The interval values are very useful when doing date or time arithmetic. 1 1. starttime)) * INTERVAL '1 SECOND' AS hhmmss Doing that gives us a negative interval. -- Results in: 1 year-- Complex interval with multiple units SELECT '1 year 2 month 3 days 4 hours 5 minutes 6 seconds'::interval;-- Results in: 1 year 2 mons 3 days 04:05:06-- Alternative In PostgreSQL, there isn't a direct DATEDIFF function like in other databases. The difference between two TIMESTAMPs is Experts, I have this column I used the following to calculate the time difference between two time stamps: x. PostgreSQL: -- Add 1 day to the current date an interval, which can be cast to seconds in the query and give you precise, accurate, repeatable results every time. PostgreSQL INTERVAL Syntax. SELECT EXTRACT(epoch FROM INTERVAL '1 day 30 minutes 1. In our example, we use the column end_date (i. 3 Which do I want to use: DATE or TIMESTAMP? I don't need minutes or hours in my value. 584 year'; interval ----- 7 mons (1 row) postgres=# select interval '0. 9030501@sun. To change the display format of INTERVAL values, set the intervalstyle session variable or the sql. NOW() - last_sync > 86400 * 30 would be equals to. invalid input syntax for type interval in Postgres. 당연히도 postgres는 이를 위한 기능을 제공하는데, 그게 바로 interval 타입이다. SELECT DATE (NOW())+ INTERVAL '1 YEAR' AS timestamp; SELECT DATE (NOW())+ INTERVAL '1 YEAR 10 SECONDS' AS timestamp; Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql). Postgres does support what you want, using the perhaps unintuitive name epoch. 584 year'; interval . . ) to ::INTERVAL SECOND TO SECOND, you get the total number of seconds in the interval. YEAR MONTH DAY HOUR MINUTE SECOND YEAR TO MONTH DAY TO HOUR DAY 시간 값 변경: interval. Let’s first see a basic example without creating a table. How can I PostgreSQL INTERVAL Examples. The interval type has an additional option, which is to restrict the set of stored fields by writing one of these phrases: PostgreSQL interval data type value involves 16 bytes storage size, which helps to store a period with the acceptable range from -178000000 years to 178000000 years. In PostgreSQL, INTERVAL types are used to store time interval values, such as N years, N months, N days, N hours, N minutes, and N seconds. Convert timestamp to interval in postgresql. 900 * interval '1 second' interval '00:15:00' * 21 * interval '1 day' interval '21 days' * double precision '3. 0. RETURN s; LANGUAGE 'plpgsql'; make_interval ( [ years int [, months int [, weeks int [, days int [, hours int [, mins int [, secs double precision]]]]] ) → interval. 428452 2014-08-10 I was wondering how we can compute the difference of successive date-times (for example in days or seconds), considering the sample table below: time value 2020-03-30 00:25:10 I have TableA and it has a field of time_captured | timestamp without time zone | default now() It is being used to record when data was inserted into the table. These tools I have a data source with the time information being formatted like this: 'MI:SS'. You can subtract an "interval" with the desired length from that column: select the_timestamp_column - interval '2' second from the_table More about intervals in the manual. The second format is postgres_verbose, where the hh: mm: ss format is replaced with explicitly stated hours, minutes, and seconds. To change IntervalStyle to はてなブログをはじめよう！ ritchiekotzenさんは、はてなブログを使っています。あなたもはてなブログをはじめてみませんか？ In this article, we would like to show you how to extract second(0-59) from DATE, TIMESTAMP, TIME or INTERVAL in PostgreSQL. Let us get a better However, your untyped string literals are now cast to interval and without any given time unit, an integer number means seconds by default, so the predicate effectively selects a narrow time frame of 10 to 30 seconds from now. If you want to display your result only in date type after adding the interval then, should try this. Here are some key things to know about PostgreSQL intervals: PostgreSQL中的interval是一种数据类型，用于表示时间间隔。它可以表示年、月、日、小时、分钟、秒等时间单位之间的差异。interval类型可以用于计算日期和时间之间的差异，也可以用于在日期和时间上进行加减运算。 To get a rounded result, add 30 seconds to the timestamp first, for example: select date_trunc('minute', now() + interval '30 second') This returns the nearest minute. Working with DATE, TIMESTAMP, and INTERVAL in PostgreSQL can be confusing. The allowed range of p is from 0 to 6. Edgar Ortega The above example calculates the replication lag between a primary and standby PostgreSQL server, so simply replace pg_last_xact_replay_timestamp() with your TIMESTAMP. Intervals are made up of fields like year, month, day, hour, minute, Master PostgreSQL's interval data type and generated columns. We can also subtract seconds from a date value or a date and time combination. Create interval from years, months, weeks, days, This tutorial introduces PostgreSQL interval type and shows you how to manipulate interval values using arithmetic operators and functions. ) timezone_hour. In PostgreSQL, a powerful open-source relational database management system, you can manipulate timestamps to round them to desired intervals. , INTERVAL '1 year 2 months 3 days 4 hours 5 minutes 6 seconds'). Here are the questions: What types are they? And what options do they have? This means that the type has precision 3 for milliseconds in the value. Although PostgreSQL does not provide DATEADD function similar to SQL Server, Sybase or MySQL, you can use datetime arithmetic with interval literals to get the same results. defaults. The difference between What you are looking is basically just a format conversion with specific output format. The closest interval '1 second' * 900 → 00:15:00. For example, ‘3 years 2 months 15 days 4 hours 35 minutes‘ expresses an interval. I have a table where date | interval juin 1, 2022, 12:00 AM | 0 years 0 mons 0 days 0 hours 1 mins 58. 583 year'; interval . The interval type seems to tailor-made for your use case. The Syntax of PostgreSQL Interval data type is This has come up a couple of times, e. It stores a period of time as a single value(e. Preferably, by altering work_time column, not by changing the select query. e. In the case of the interval types, the valid range for p is 0 to 6. A time interval is not a time point, but a time period. We can specify intervals when performing arithmetic against dates and times. Each part can be either positive or negative. 7 mons 何となく雑多なメモです。使用したPostgreSQLのバージョンは9. 5 → 03:30:00. timestamp / timestamptz / interval accordingly. postgres_verbose. The difference will be of the type interval, which means you'll see it in days, hours, minutes, and seconds. 1 First, the legalese; 2 INTRODUCTION; 3 ANSI SQL and OPERATORS; 4 WORKING with DATETIME, DATE, and INTERVAL VALUES. (1 row) postgres=# select '65 minutes'::interval postgres-# ; interval ----- 01:05:00 (1 row) Share. The DATE_TRUNC() function truncates a TIMESTAMP, a TIMESTAMP WITH TIME ZONE, or an INTERVAL value to a specified precision. For more precise measurements, such as hours, minutes, or seconds, PostgreSQL offers the AGE function and interval arithmetic. No problem of type with the last one. 6より前のバージョンでは、入力が無限大のすべての場合に対してゼロを返していました。 extract関数は主に演算処理を意図しています。 quite ugly to round upwords and downwords: t=# with a(ts) as ( values ('2017-06-07 14:11:20'::timestamp),('2017-06-07 14:11:40'),('2017-06-07 14:12:10'),('2017-06-07 14:11:50') ) , c as ( select *,date_trunc('minute',ts) t0, date_trunc('minute',ts) + '15 seconds'::interval t1,date_trunc('minute',ts)+ '30 seconds'::interval t2,date_trunc('minute',ts)+ '45 . PostgreSQL 将时间间隔转换为数字在PostgreSQL中转换时间间隔到数字 在本文中，我们将介绍如何在PostgreSQL中将时间间隔转换为数字。在某些情况下，我们可能需要将不同的时间间隔单位转换为数字，以方便进行计算或比较。PostgreSQL提供了几种内置的功能来实现这一点。 Summary: in this tutorial, you will learn how to use the PostgreSQL MAKE_INTERVAL() function to create an interval from the interval’s components. Example. PostgreSQL interval data type takes 16 bytes of storage that allows storing a period with a range from -178000000 years to 178000000 years. You provide the years, months, weeks, days, I'm new to PostgreSQL (I have been using MS SQL for many years) and need to convert a numeric column which contains a time in seconds to HH:MM:SS format. 4. To calculate the difference between the timestamps in PostgreSQL, simply subtract the start timestamp from the end timestamp. 1234 valid units are the following (and their plural forms): microsecond millisecond second minute hour day week In PostgreSQL, we can use the + operator to add one or more seconds to a time value. How? On Thu, Oct 28, 2004 at 04:08:53AM +0600, Denis Zaitsev wrote:[color=blue] > How can I calculate the number of second in some interval? Neither > the secods part, nor the seconds after midnight Just the full > quantity of the seconds. An interval can contain years, months, weeks, days, hours, seconds, and microseconds. The function has the following syntax: In Informix INTERVAL SECOND TO SECOND data type stores a time interval in seconds. PostgreSQL の9. 423. 2. s INTEGER; SELECT (EXTRACT (EPOCH FROM t::interval)) INTO s; . SELECT start_time, expiration_time_seconds, start_time + expiration_time_seconds * interval '1 second' FROM whatever ORDER BY start_time; start_time | expiration_time_seconds | end_time -----|-----|----- 2014-08-05 08:23:32. 1234 || ' seconds')::interval outputs: 00:02:12. Returns seconds so for hours needs int_interval('1 day') / 3600. If we divide this number by (60*60*24) we get 30. 3. The months and days values are integers while the seconds field can have fractions. NOW() > 86400 * 30 + last_sync With the first line, you have interval > integer with the second line, you have timestamp > timestamp. However not all of these units play nicely together. PostgreSQL interval 数据类型简介; PostgreSQL interval 输入格式. Use 'minute' to truncate to the minute (also discard seconds). endtime) - EXTRACT(EPOCH FROM time. But sometimes it is necessary to calculate how many intervals occur between two points in time, The Postgres documentation says there's an interval type, with the following syntax: interval [ fields ] [ (p) ] The interval type has an additional option, which is to restrict the set of stored fields by writing one of these phrases: YEAR MONTH [Ed: and many more] DAY TO SECOND [Ed: and many more] Master PostgreSQL's interval data type and generated columns. Interval field in Postgresql. Quick solution: SELECT In PostgreSQL, the make_interval() function creates an interval from years, months, weeks, days, hours, minutes and seconds fields. Is it possible to cut the seconds part, so it will be displayed as 200:00? Or, even better: 200h00min (I've seen it accepts h unit in insert so why not load it like this?). example: select (123. 234 seconds'); ┌───────────┐ │ date_part │ ├───────────┤ │ 88201. 1. e. [/color] I think you can do that using PostgreSQL has a special interval type to store a length of time, e. See Postgres Date/Time Functions and Operators for more info Postgres does not have a dateTime data type. In nearly all cases you are better off selecting and converting the time in SQL rather than converting the start and end times Discussion. The data type of return values matches the input, i. It provides a precision attribute (‘ p’) that allows you to specify the number of fractional digits retained in the seconds field, enhancing the precision of time calculations and results. SELECT interval'2 hours 3 minutes 20 seconds'; This can be added to a timestamp in order to form a new timestamp, or multiplied (so that (2 * interval'2 hours') = interval'4 hours'. You only want the number (because you always just want days) so you need to extract that part. , select extract (epoch from ( time1 - time2 )::interval ) as "seconds", is one approach. The hour component of the In Postgresql, I try to subtract 5 milliseconds (using fixed constant, when I search on Google, most of example using fixed constants). If the seconds to be added are in 60 second increments, we can In your examples, the seconds are zero, so that is what you get. 數學函式及運算子; 9. The interval type has an additional option, which is to restrict the set of stored fields by writing one of these phrases: Re: interval to seconds conversion. SELECT ([field start_date] - interval '00:00:00. Hot Network Questions Does gender affect the legal value of testimony in Islamic law and common law systems? The second is an interval value rather than a simple number. vfve btude wofpu annbh qyguti rsupn jtjqh chvu ebn ipplw xppx lybfd elynad givy tkkuq