Share. Current Date/Time. Practical examples would include analyzing company’s. Table 9. Postgresql date_trunc function. start_date) <= DATE_TRUNC ('day', q. It is important to note that the time and time zone returned by this function is from the time the transactions start. day. I am trying to do a time series-like reporting, for that, I am using the Postgres DATA_TRUNC function, it works fine and I am getting the expected output, but when a specific interval has no record then it is getting skipped to show, but my expected output is to get the interval also with 0 as the count, below is the query that I have right now. , week, month, and year. Note that the latter returns a timestamp with time zone, not a timestamp value. The date_trunc function truncates a TIMESTAMP or an INTERVAL value based on a specified date part e. Note: This shows two methods of doing the conversion, the first is the standard method. If you want both quarter and year you can use date_trunc: SELECT date_trunc ('quarter', published_date) AS quarter. . g: SELECT (date_trunc('week', now() + interval '1 day') - interval '1 day')::DATE; date ------------ 2019-06-16 As per documentation , date_trunc() accepts values of type date and timestamp and returns a timestamp (thus the cast at the end). SQLite, Oracle,. In PostgreSQL, the DATE_TRUNC function is used to truncate a date, time, or timestamp value to a specified precision. Alternatively you can use the date_trunc function: SELECT date_trunc ('day', my_date) Share. g. The following illustrates the syntax of the date_trunc function: Date_trunc is a function that returns a date part of a date or a time part of a time. psql date_trunc issue. You need a similar time function in PostgreSQL. However, Postgres' date type doesThe PostgreSQL date_trunc() function truncates a specified timestamp or interval value to the specified part and returns the result. 9. 0. date_trunc(text, timestamp) timestamp: Truncate to specified precision; see also Section 9. It looks like this: select date_trunc('month',now()). PostgreSQL provides the extract function to get a date's year and week number according to the ISO 8601 standard, which has the first week of every year containing January 4th. date_trunc(text, timestamp) timestamp: Truncate to specified precision; see also Section 9. The first removes the hours and smaller units from the timestamp, but still returns a timestamp, while the latter returns the timestamp cast to a date. Postgres では、特定のタイムスタンプを特定のレベルの精度に切り詰めたり丸めたりすることができます。 たとえば、最も近い分、時間、日、月などに切り捨てることができます。 In PostgreSQL, DATE_TRUNC Function is used to truncate a timestamp type or interval type with specific and high level of precision. , 2000-12-31. date_trunc can be really helpful if you want to roll up time fields and count by day or month. Gordon Linoff went further in his. See full list on database. MessageText: function date_trunc(unknown, timestamp with time zone, unknown) does not exist Hint: No function matches the given name and argument types. Simply try. But in the check constraints, I see that the truncated date is being shifted. What is the linq equivalent to sql trunc date? 0. ) field selects to which precision to truncate the input value. Mathematical operators are provided for many PostgreSQL types. reg = 'PH-BVA' GROUP BY 1, "PositionReport". For types without standard mathematical conventions (e. The following example illustrates how to use the CURRENT_TIME function with the precision set to 2: The CURRENT_TIME function can be used as the default value of TIME columns. select cast (date_trunc ('month', current_date) as date) 2013-08-01. CURRENT_TIMESTAMP関数 現在の日時を求める. beikov February 2, 2023, 2:29pm 4. The PostgreSQL formatting functions provide a powerful set of tools for converting various data types (date/time, integer, floating point, numeric) to formatted strings and for converting from formatted strings to specific data types. Use the aggregate FILTER clause in Postgres 9. Example of grouping sales from orders by month: select SUM(amount) as sales, date_trunc('month', created_at) as date from orders group by date order by date DESC; In Postgresql, to truncate or extract the week of the timestamp value, pass the week as a string to the date_trunc function. PostgreSQL : Converting timestamp without time. Syntax. 2: date_trunc('hour', timestamp '2001-02-16 20:38:40') 2001-02-16 20:00:00:. For the date_part and date_trunc functions, arguments can be `year', `month', `day', `hour', `minute', and `second', as well as the more specialized quantities `decade', `century', `millenium', `millisecond', and. PostgreSQL Version: 9. 6 Answers. The following illustrates the syntax of the PostgreSQL TRUNC() function:. この. extract関数の場合は、extract (month from request_time)という書き方だったが、date_trunc関数ではmonthをシングルクォーテーションで囲む必要がある。. 9. 2020-04-01, and has the advantage that subsequent steps in the pipeline can read it like a normal date. PostgreSQL provides a number of functions that return values related to the current date and time. and while the condition is > '2018-10-01' then all dates in the month October will not be shown in the result. PostgreSQL 如何在postgres中截取日期 在本文中，我们将介绍如何使用PostgreSQL数据库中的函数和操作符来截取日期。 阅读更多：PostgreSQL 教程 1. PostgreSQL is a powerful database and includes various functions for managing timestamps and date times. Definition of PostgreSQL Trunc () PostgreSQL’s trunc () function is used to truncate the decimal places to a certain precision. (Values of type date and time are cast automatically to timestamp or interval, respectively. The basic syntax of the DATE_TRUNC function is as shown below:. Add a comment. 19, earlier I have made the following Query. Follow answered Jun 10, 2020 at 14:04. Is that what you want?GROUP BY date_trunc('day', datelocal) ORDER BY date_trunc('day', datelocal); A bit more noisy code, but faster (and possibly easier to optimize for the query planner, too). postgresql error: function date_trunc(unknown, text) does not exist LINE 1: SELECT DATE_TRUNC('day', "Date") AS __timestamp, ^ HINT: No function matches the given name and argument types. date_trunc. This function truncates a date/time value to a specified precision. Assuming you are using Postgres, you need quotes around your date constant and can convert to the right types: WHERE job_date >= DATE_TRUNC('month'::text, '2019. –0. Now, let us see the Date/Time operators and Functions. Current Date/Time. SELECT date_trunc ('day', time), "PositionReport". It is slightly dirty, though, because the minimum time interval is an implementation detail of current Postgres versions. 600. We’ll use it for different. 9. 8. , hour, week, or month and returns the truncated timestamp or interval with a level of precision. This is most useful on large tables. the postgres server timezone. Also avoids misunderstandings general communication. 1, compiled by Visual C++ build 1800, 32-bit" The data types of two columns which I am dealing with: eventtime timestamp without time zone sourceid integer NOT NULL Time zone is "Europe/Berlin". , week, year, day, etc. In postgres, you could phrase this as: date_trunc ('quarter', current_date) + interval '3 months' - interval '1 day'. To store date values, you use the PostgreSQL DATE data type. DATE_TRUNC() is a function used to round or truncate a timestamp to the interval you need. 9. date_created <= { {date_range_end. Improve this answer. 文章浏览阅读9. Practical examples would include analyzing company’s quarterly. 9. The syntax for the function is DATE_TRUNC('datepart', timestamp), seems you need to use as DATE_TRUNC('month', session_utc)(this already truncates to the first date of April 2019 i. com> Reviewed-by: David Fetter <david@fetter. Syntax: date_trunc(text, timestamp) Return Type: timestamp. date_trunc() in Postgres is the equivalent to trunc() for dates in Oracle - but it's not needed for date values in Postgres as a date does not contain a time part. postgres=# SELECT date_part('hour', timestamp '2002-09-17 19:27:45'); date_part ----- 19 (1 row) date_part(text, interval) The date_part() function is used to get subfield (equivalent to extract). g. 0) $$. As you don't want to include rows from "this" month, you also need to add a condition for that. You can truncate the current date to its quarter, then remove 1 day from that (and potentially cast back to date): -- You really only need the last column, the other two just show the different steps in the process SELECT DATE_TRUNC ('quarter', CURRENT_DATE) , DATE_TRUNC ('quarter', CURRENT_DATE) - '1. In this case I use the now() function to return the current date, and the 'month' argument modifies that date to the beginning of. PostgreSQL provides a number of functions that return values related to the current date and time. postgresql ignore milliseconds from timestamp when doing a select statement. There is no function you want, but as said in postgresql wiki you can define function for youself: CREATE OR REPLACE FUNCTION round_time_10m (TIMESTAMP WITH TIME ZONE) RETURNS TIMESTAMP WITH TIME ZONE AS $$ SELECT date_trunc ('hour', $1) + INTERVAL '10 min' * ROUND (date_part ('minute', $1) / 10. In PostgreSQL, the DATE_TRUNC function is used to truncate a date, time, or timestamp value to a specified precision. 2014-05-09 16:03:51 will be returned as 2014-05-01 00:00:00. , and a timestamp. 2. Pictorial Presentation of PostgreSQL DATE_PART() function. I use this in a group by query to get a count for a certain amount of dates. What is better: select date with trunc date or between. SELECT * FROM table WHERE DATE_TRUNC('day', date ) >= Start Date AND DATE_TRUNC('day', date ) <= End Date Now this solution took : 1. DATE is an important data type that stores calendar dates in PostgreSQL. Related: PostgreSQL: between with datetimeFor example: SELECT user_id FROM user_logs WHERE login_date >= '2014-02-01' AND login_date < '2014-03-01'. For formatting functions, refer to Section 9. - It retrieves the trimmed part with a specific precision level. 9. The real usefu. But I found that there's a trunc() function in pg_catalog. date) AND DATE_TRUNC ('day', c. Simplify calculation of months between 2 dates (postgresql) 0. The result should be change to the nearest time i. Example 1: PostgreSQL DATE_PART() function. PostgreSQL releases before 8. 1. 9. For example I need to get number of sales each week. Modified 1 year, 7 months ago. These functions all follow a common calling convention. ). This generates a timestamp value, that you can cast if you. SELECT TRUNC(CURRENT_TIMESTAMP) Postgresql. I will get the same. ; some date parts include others: i. ·. When used with a timestamp, truncates the timestamp to a date (day) value and returns a timestamp with or without time zone depending on type of the argument. Finding events relative to the present time with NOW () and CURRENT_DATE functions. The result is 03 records. I want to generate a series of months. Then format date the way you want. These SQL-standard functions all return values based on. Hyperloglog is a Postgres extension for doing high-compression storage and query approximations. date_trunc(text, timestamp) timestamp: Truncate to specified precision; see also Section 9. PostgreSQL provides a number of functions that return values related to the current date and time. select count(*) as logged_users, EXTRACT(hour from login_time::timestamp) as Hour from loginhistory where login_time::date = '2021-04-21' group by Hour order by Hour;. SELECT * FROM Conference WHERE date_start >= date_trunc ('month', current_date - interval '1' month) and date_start <. extract() complies with the SQL standard, date_part() is a Postgres specific query. These SQL-standard functions all return values based on the start. When used to aggregate data, it allows you to find time-based trends like daily purchases or messages per second. openu. The answer depends on whether it is a timestamp with time zone or one without: If it's a timestamp with time zone, you can convert to PST with select time1 AT TIME ZONE 'US/Pacific' and get the date with select date_trunc ('day', time1 AT TIME ZONE 'US/Pacific') If it's a timestamp without time zone stored in UTC that you. The time zone is variable. Truncate a date in Postgres (latest version) 0. PostgreSQL releases before 8. 所以在此只说明Postgresql 中的TRUNC取断函数. Asked 10 years, 9 months ago. I need to query for a date like the one in my code, and in postgreSQL i found date_trunc to "cut off" unnecessary information from the date. Expected output format:EXTRACT関数 日付値から任意の日付要素を求める. date=to_char (date_trunc ('day', se. ). It also uses this format for inserting data into a date. For example. SELECT my_date::date::timestamp. But it would return a. ac. date_part(text, timestamp) or date_part(text, interval) Return Type: double precision. - The value for the field. In existing versions of Postgres, you can use arithmetic: select t. SELECT date_trunc ('month', cast (my_date as timestamp)) FROM my_table. Truncate it to the start of the day (still timestamp without time zone ): date_trunc ('day', (now () AT TIME ZONE 'America/New_York')) Get the. 2) and found the date_trunc function extremely useful for easily matching time stamps between certain days/months/etc. 0. Improve this answer. ) field selects to which precision to truncate the input value. Truncate to specified precision; see Section 9. For. For formatting functions, refer to Section 9. GMB GMB. 2 Answers. for example 2018-10-15 will be 2018-10-01 and 2018-10-30 also will be 2018-10-01. I. Let’s add a year to any date. 1. 5w次，点赞19次，收藏139次。摘要:Oracle有大量的日期函数可供使用,trunc, new_time,months_between,next_day,last_day,add_months,round等函数. You can use DateStyle to control how PostgreSQL emits dates, but it's global and a bit limited. 2. The DATE_PART() function extracts a subfield from a date or time value. 0. Teams. Learn more about Teams3 Answers. Truncation means setting specific parts of the date or time to zero or a default value while keeping the more significant parts unchanged. 閾値として、0msecちょうどで更新日時を比較したい時にdate_truncを使用したので、その備忘録。 PostgreSQLで記述。 秒で指定した場合. For example, if I have a table that looks like this. Truncate date in units other than default choices using date_trunc (Postgres 9. e. 3 Answers. If you want to cast your created_at field, you have to write like this as following: CAST (transactions. 37. date_trunc関数の第一引数には任意の値を文字列として指定する。. Friday afternoon and I'm fried. 0. The table currently has nearly 5 million rows and this query currently takes 8 seconds to execute. 5. As one gets converted to the other, there is absolutely no performance difference. Update. Note: All the date field parts other than the targeted. What is the fastest way to truncate timestamps to 5 minutes in Postgres? Postgres 13 or older SELECT date_trunc('hour', date1) AS hour_stump , (extract(minute FROM date1)::int / 5) AS min5_slot , count(*) FROM table1 GROUP BY 1, 2 ORDER BY 1, 2; You could GROUP BY two columns: a timestamp truncated to the hour and a 5-minute-slot. 8. lead_id) as "# New Leads" from leads l where l. PostgreSQL's date_trunc in mySQL. There is no function you want, but as said in postgresql wiki you can define function for youself: CREATE OR REPLACE FUNCTION round_time_10m (TIMESTAMP WITH TIME ZONE) RETURNS TIMESTAMP WITH TIME ZONE AS $$ SELECT date_trunc ('hour', $1) + INTERVAL '10 min' * ROUND (date_part ('minute', $1) / 10. source is a value expression of type timestamp or interval. Checkout DoctrineExtensions. Truncate to specified precision. How to truncate seconds from a column (timestamp) in PostgreSQL without using date_trunc function. 3 . I have an sql query am trying to make to my postgres db. For this purpose, specify the “MONTH” as the first argument to any of the functions mentioned above and then use the GROUP BY clause. Use the below command: SELECT date_trunc ('week', timestamp'2021-08-23 19:14:20'); Postgresql date_trunc week. PostgreSQL releases before 8. 1: Date/Time Types. 4. Postgres has lots of functions for interval and overlap so you can look at data that intersects. x: CriteriaBuilder cb = entityManager. We are also looking at upgrading to a newer version of Postgres but that is further out. The start should be the first month of the current year, the stop is the current date with an interval of 1 month. g. For data type TIMESTAMP WITH LOCAL TIME ZONE this function is calculated within. CREATE INDEX ON. The day (of the month) field (1 - 31). Yes, that is how you use date_trunc. The extract function () is used to retrieves subfields such as year or hour from date/time values. date_created >= { {date_range_start}} and l. date_trunc always returns a timestamp, not a date. The first day of a week (for format element 'week') is defined by the parameter NLS_FIRST_DAY_OF_WEEK (also see ALTER SESSION and ALTER SYSTEM ). created_at as timestamp) at time zone '+08:00'))::DATE AS period_start FROM transactions LIMIT 1. 1 Answer. 例1：now()=2023-04-18 00:00:00. we are using Postgresql 9. Date/Time Functions. 1. Century Day Decade Hour Minute Microsecond Millisecond Second Month Quarter Week Year Here’s the current. 2: date_trunc('hour', timestamp '2001-02-16 20:38:40') 2001-02-16 20:00:00:. But there is also no point in casting date literals to date as input parameter. callsign FROM tvh_aircraft. Syntax: DATE_PART (field, source) In the above syntax the field is an identifier that is used to set the field to extract the data from the source. They truncate all parts of the date up to kind which allows grouping or. E. These functions all follow a common calling convention: the first argument is the value to be. Get subfield. Here’s the current timestamp. I want to use date_trunc function in PostgreSQL on my datetime column to aggregate data in a week. Add a comment. Getting the first day is easy and can be done with date_trunc. create index mytable_ts_day on mytable (extract (day from ts)) and this index then can be used for a matching expression like extract (day from ts) = 9, or any other operator on. Viewed 11k times. I'm trying to create a string with the week number and the first and last date on that week, like this: 'W41 04/10-10/10' I was able to create a formula on Google Sheets that solve my problem and now I need to do this on PostgreSQL. e. Here’s an example that returns the last day of the current month: SELECT (date_trunc ('month', now ()) + interval '1 month - 1 day'); Result: 2022-04-30 00:00:00+10. 9. Example. In your example, you could use: SELECT * FROM myTable WHERE date_trunc('day', dt) = 'YYYY-MM-DD'; If you are running this query regularly, it is possible to create an index using the date_trunc function as well: CURRENT_DATE: DATE: Return the current date: CURRENT_TIME: TIMESTAMPTZ: Return the current time: CURRENT_TIMESTAMP: TIMESTAMPTZ: Return the current date and time with time zone at which the current transaction starts: DATE_PART: DOUBLE PRECISION: Get a field of a timestamp or an interval e. 2: date_trunc('hour', timestamp '2001-02-16 20:38:40') 2001-02-16 20:00:00. Replicate Oracle's `TRUNC(DATE, 'WW')` behaviour in PostgreSQL. 1 Answer Sorted by: 2 They both do very different things. Popular Course in this category. A primer on working with time in Postgres. The full docs in section 9. The DATE_TRUNC () function is particularly useful for time series analysis to understand how a value changes over time. DATE_TRUNC: TIMESTAMP date_trunc is only defined for timestamp with time zone and timestamp inputs. Select Query SELECT (date_trunc('MONTH', now()) + INTERVAL '1 MONTH -. 这是 PostgreSQL date_trunc() 函数的语法： date_trunc ( field TEXT , source TIMESTAMP ) -> TIMESTAMP date_trunc ( field TEXT , source TIMESTAMPTZ , time_zone TEXT ) -> TIMESTAMPTZ date_trunc ( field TEXT , source INTERVAL ) -> INTERVAL However, date_trunc('day', created) is not equivalent to the other expressions, because it returns a timestamp value, not a date. I can't believe the accepted answer has so many upvotes -- it's a horrible method. Your solution and mine give. 2 do mention both forms though. 3. 45 (1 row) Previous: TAN function Next: PostgreSQL ARRAY functions ARRAY_APPEND function Follow us on Facebook and Twitter for. Introduction to the PostgreSQL date_trunc function. Let’s see the following example. If you want to take the current date as the first argument, you can use the following form of the AGE() function: AGE(timestamp); Code language: SQL (Structured Query Language) (sql) For example, if someone has a birth date2000-01-01 and the current date is 2017-03-20, his/her age will be:2 Answers. TRUNC (number [, precision]) Code language: CSS (css) Arguments. DATE_TRUNC('datepart', timestamp) Arguments. starttime) yields the start of the month in the time zone of the system that created or refreshed the materialized view. The documentation shows following usage example: SELECT date_trunc('hour', TIMESTAMP '2001-02-16 20:38:40'); Result: 2001-02-16 20:00:00 So I thougt this should work: The date datatype is text. postgres=# SELECT to_char(CURRENT_DATE, 'YYYYMMDD')::integer; ┌──────────┐ │ to_char │ ╞══════════╡ │ 20190718 │ └──────────┘ (1 row) But I have to say, so working with this representation of date is strange and unhappy. The DATE_TRUNC() function is particularly useful for time series analysis to understand how a value changes over time. Modified 1 year, 1 month ago. 26 lists them. For example I need to get number of sales each week. first day of year + current week * 7 days = closest preceding date with same day of week as the first day of the year. SELECT date_trunc ('week', day::DATE + 1)::date + 5 AS anchor, AVG (value) AS average FROM daily_metrics WHERE metric = 'daily-active-users' GROUP BY anchor ORDER BY. Follow. The following example shows how to use the date_trunc() function to truncate a timestamp value to hour part, as follows:first day of year + current week * 7 days = closest preceding date with same day of week as the first day of the year. It can also return a number truncated to the whole number if no precision is defined. The subquery is not strictly needed, but it makes the code easier to read. Thanks, but just for your own sake, you should maybe consider making use of Hibernate APIs if you want to get the best out of your ORM. date_trunc('hour', timestamp '2001-02-16 20:38:40') → 2001-02-16 20:00:00:. I've looked around and I can't figure out the right syntax for accessing the month and comparing with the current month. Introduction. Is there any way possible or workaround I can do to say that the first month of first quarter is for instance September? So instead of the traditional: Q1: 1-3, Q2: 4. Since this is a performance-critical part of the query, I'm wondering whether this is the fastest solution, or whether there's some shortcut (compatible with Postgres 8. ktkr！ と思ったのですが、、、 SELECT CURRENT_DATE; でよかったorz. 7. The date_trunc function truncates a TIMESTAMP or an INTERVAL value based on a specified date part e. Here is a function that mimics postgres' DATE_TRUNC contract using the DATE_FORMAT mysql function that @Charles has recommended above. Table 10-4. Input Format: Dates in yellow are the dates to aggregate sales on. TRUNC( date_value, format ) You are providing a string value instead of a date value and 'dd-mm-yy' is an invalid format (you just want to truncate to the start of the day using 'dd' as the format or the start of the month using 'mm' or the start of the year using 'yy' - but using all three together does not make. Say, you can truncate it to the nearest minute, hour, day, month, etc. create index on test (date_trunc('month', foo::timestamp )); the problem with foo at time zone 'GMT' is that the expression foo at time zone 'GMT' is not itself immutable. Read: Postgresql date_trunc function Postgresql date add year. date_trunc('field', source) source is a value expression of type timestamp (values of type date and time are cast automatically). Truncate a date in Postgres (latest version) 1. . MySQL - Truncating Date/Time and Subtracting from Each Other. 000000 as a valid time, while a day for LocalTime or OffsetTime maxes out at the preceding nanosecond. 2: date_trunc('hour', timestamp '2001-02-16 20:38:40') 2001-02-16 20:00:00. In PostgreSQL, DATE_TRUNC Function is used to truncate a timestamp type or interval type with specific and high level of precision. date_trunc(field, source [, time_zone ]) source is a value expression of type timestamp, timestamp with time zone, or interval. Very unlikely to change though. I'm using a python package called architect that helps in using Postgres partition in Django model. 1. *, min (date_trunc ('week', date)) over () as first_week from t ) t; Here is a db<>fiddle. RTRIM. Four star feature compatibility Four star automation level Data Types PostgreSQL is using different function names. In this case, for the month before last I'd write:Learn how to round or truncate timestamps in PostgreSQL for effective time-based grouping using the date_trunc function. Trimming trailing :00 from output after date_trunc. GROUP BY 1. SELECT date_trunc('MONTH', dtCol)::date; But getting the last day is not so straight forward. You can use this for PostgreSQL. You're storing timestamps, not just dates, and you want to group by day not by number of previous events. If you want just the date in the current time zone, cast to a date. Table 9-28 shows the available functions for date/time value processing, with details appearing in the following subsections. PostgreSQL provides a number of functions that return values related to the current date and time. : select date_trunc_interval('15 minutes', timestamp '2020-02-16 20:48:40'); date_trunc_interval ----- 2020-02-16 20:45:00 (1 row) With this addition, it might be possible to turn the existing. g. +01 +02 etc depends on your time locale's daylight saving rules. select date_trunc ('minute', created_at), -- or hour, day, week, month, year count(1) from users group by 1. A more specific answer is: where generated_time >= date_trunc ('hour', current_timestamp) and generated_time < date_trunc ('hour', current_timestamp) + interval '1 hour'. That is still a distinguishable value. Summary: in this tutorial, we will introduce you to the PostgreSQL DATE_PART() function that allows you to retrieve subfields e. Yes, I believe that's the case. SELECT * FROM stud_cmp WHERE DATE_TRUNC ('day', start_date) = '2020-01-01' :: timestamp; In the above example, after comparing the start date and with date_trunc functions, it will display the three records which contain the comparison. milliseconds. 2: date_trunc('hour', timestamp '2001-02-16 20:38:40'). A similar functionality provides the Oracle compatible function TRUNC [ATE] (datetime). Friday afternoon and I'm fried. What could be going wrong here. Mathematical operators are provided for many PostgreSQL types. 4 or later. g. For example, date_trunc can aggregate by one second, one hour,. 5. postgres sql, date_trunc without extra zeroes. Connect and share knowledge within a single location that is structured and easy to search. (Values of type date and time are cast automatically to timestamp or interval, respectively. date_trunc(text, timestamp) The date_trunc() function is used to truncate to specified precision; Return Type: timestamp. Basically this expression gives you the last day of the current quarter (provided that you remove the last closing parenthese, which otherwise is a syntax error). date_trunc. You should be familiar with the background information on date/time data types from. 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. 2. SELECT date_trunc('week', received_at) AS query_week, COUNT(DISTINCT customer_id) AS. Sorted by: 3. , week, year, day, etc. Jun 27, 2014. PostgreSQL Version: 9. In time-series analysis, the granularity could be on intervals of years, quarters, months, weeks, days, or hours. 2 dea7d4996a What are you trying to achieve? Use Postgresql DATE_TRUNC() Function What happened? When I run the following query on Dbeaver or DataGrip, the result is like expected, but in Grafana, its subtracting -1 in the month and showling the last day otf the. 9.