INTERVAL allows either YEAR and MONTH to be mixed together or DAY, HOUR, MINUTE and SECOND. The special difficulty of your task: you want the ceiling, not the floor (which is much more common). 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 certain cases, it can also speed up some of your queries. In PostgreSQL, DATE_TRUNC Function is used to truncate a timestamp type or interval type with specific and high level of precision. To generate a series of dates this is the optimal way: SELECT t. Connect and share knowledge within a single location that is structured and easy to search. Here is my sql below (This is based on Postgres. ). Working with Dates (SQL) - EXTRACT, DATE_PART, DA…How to truncate date in PostgreSQL? Ask Question Asked 10 years, 2 months ago Modified 10 years, 2 months ago Viewed 42k times 22 I'm trying to select all. It is only meant as a quick reference to those I use most often. So if the date in the field input was 04/26/2016 this syntax returns 4,. Here is the syntax of the PostgreSQL date_trunc() function: date_trunc (field TEXT, source TIMESTAMP). For example, if we want to truncate the date and time value to the nearest hour or week, it is possible to truncate using the date_trunc function. 6. 必需的。 它是一个字符串表示要截取到部分。您可以是使用以下值： microseconds; milliseconds; second; minute; hourBasically 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). The week number will be in the range of 1 to 53, depending on the specific date and the datestyle setting in PostgreSQL. This can be generalized to any type of grouping. If you're certain that column should always store only the first of a month, you should also use a CHECK constraint. Current Date/Time. 8. date_trunc('month', current_timestamp) gives you the start of "this month" so in March this would be 2021-03-1 as the comparison for the upper limit is done using < it will include everything on the last day of February (including 23:59:59. RTRIM (‘abcxxzx’, ‘xyz’) ‘abc’. The date_trunc function contains the two input parameters, i. 摘要：本教程向您展示如何使用 PostgreSQL 的date_trunc()函数，将时间戳或间隔值截断到指定的精度级别。 PostgreSQL date_trunc 函数简介. Sorted by: 3. The functions in this section use a format string that is compatible with JodaTime’s DateTimeFormat pattern format. Here is how you can convert an epoch value back to a time stamp: SELECT TIMESTAMP WITH TIME ZONE 'epoch' + 982384720 * INTERVAL '1 second'; hour. See the documentation for all values. Example 3:. , week, month, and year. Does PostgreSQL have such a built-in function?Functions and Operators. , year, month, week from a date or time value. 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. ). Syntax. Here is my solution adapted to the question given: SELECT DATE_TRUNC ('minute', NOW ()) - MAKE_INTERVAL (MINS => MOD (EXTRACT (MINUTE FROM NOW ())::INTEGER, 15)) Explanation: DATE_TRUNC the timestamp to. answered Aug 18, 2015 at 10:52. Try to envision time periods on a straight time line and move them around before your eyes and you will see the necessary conditions. reply. The date_trunc function in redshift is specifically used to truncate the specified precision. DATE_TRUNC returns a date or timestamp, while DATE_PART returns a subfield from a date or timestamp. I assume this is for analytics purpose. date_trunc('hour', interval '2 days 3 hours 40 minutes') 2 days 03:00:00:. date, q1. DATETIME_TRUNC(datetime_expression, part) Example: DATETIME_TRUNC('2019-04-01 11:55:00', HOUR) Output: 2019-04-01 11:00:00. (In our example, we used month precision. Formats timestamp as a string using format. 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. date_trunc | 2020-07-01 03:00:00+10 date_trunc | 2020-07-01 02:00:00+10 The local timezone when I ran these examples was Australia/Brisbane. 1. A similar functionality provides the Oracle compatible function TRUNC [ATE] (datetime). Q&A for work. Say,. 1 Answer. We’ll use it for different. 2. CREATE INDEX ON. I am trying to use the Date_Trunc for MONTH function in a SQL statement but somehow it is not working for me. Description. It's bad practice but you might be forgiven if you use. As one gets converted to the other, there is absolutely no performance difference. These SQL-standard functions all return values. Consequently, the timestamp will be rounded/truncated based on the specified date field. Two options: (1) wrap CONCAT (. ) This function takes two arguments. date, count (se. Java date functions. The date_trunc function truncates a TIMESTAMP or an INTERVAL value based on a specified date part e. I am converting a postgres app to an Oracle app. The full-list is available in the Postgres docs. PostgreSQL Date Functions Manipulation. 8. The real value returned by the CURRENT_TIMESTAMP was ‘2023-06-17. The SELECT statement below extracts the quarter each. Select Query SELECT (date_trunc('MONTH', now()) + INTERVAL '1 MONTH -. Note that the specifier is a string and needs to be enclosed in quotes. extract() complies with the SQL standard, date_part() is a Postgres specific query. Date_trunc is used to truncate the date to Week, Month, Quarter, or Year. --set the first day of the week in. LastAccessDate), quarter = DATETRUNC(QUARTER,. date_trunc () is a system function for truncating a timestamp or interval to a specified unit. I need to find the value of the previous quarter for a particular given date. ) This function takes two arguments. The quarter of the year (1–4) that the date is in. pyspark. 'QUARTER': truncate to the first date of the quarter. AT TIME ZONE. date_trunc¶. A few years later I came here to find how to round a timestamp to a 6 hour interval. (Values of type date and time are cast automatically to timestamp or interval, respectively. 9. 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. 4. Dates are stored using the DATE datatype in the PostgreSQL database. , hour, week, or month and. Postgres date_trunc quarter with a custom start month. Let’s take a look at EXTRACT syntax. 9. The DATE_TRUNC function is useful when. In order to group our orders by month, in PostgreSQL we'll use the date_trunc built-in function. Note: All the date field parts other than the targeted. This function can also truncate a number. id, generate_series(well_schedules. 1. DATE_FROM_UNIX_DATE. Part of AWS Collective. Next. For data type TIMESTAMP WITH LOCAL TIME ZONE this function is calculated within. I have an sql query am trying to make to my postgres db. The quarter of the year (1 - 4) that the date is in SELECT EXTRACT(QUARTER FROM TIMESTAMP '2001-02-16 20:38:40'); Result: 1. to_char and all of the formatting functions let you query time however you want. The following bug has been logged online: Bug reference: 2664 Logged by: Yoshihisa Nakano Email address: nakano. Truncation does not remove the month and day; instead it sets them to the earliest date in the specified period. Follow. Syntax: date_trunc ('datepart', field) The datepart argument in the above syntax is used to truncate one of the field ,below listed field type: millennium. This example uses TRUNC on a date to truncate it to a day. This example uses TRUNC on a date to truncate it into a month. This query is working for me to give me the running total of total IDs by week. SELECT EXTRACT ('quarter' FROM now()); date_part-----1 #2. Learn more about TeamsThis can be broken down into 4 steps: Take the current timestamp with time zone: now () Get the according local timestamp without time zone for New York: now () AT TIME ZONE 'America/New_York'. 31 illustrates the behaviors of the basic arithmetic operators ( +, *, etc. 5. Pad on the right of a string with a character to a certain length. See below. 9. fujitsu. md","contentType":"file"},{"name":"Script-CREATE-TABLE-dim_date. , “Year” in the above example) to their initials. SELECT * FROM generate_series(date_trunc('quarter', '2008-02-01 00:00'), '2009-01-01 12:00', '3 months');. 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. 1) precision The precision argument specifies fractional seconds precision of the second. A weird way to number weeks but might be what the OP is after :) – Andomar. What I want instead is a function that takes three parameters, so I could do make_date(2000, 1, 2) and use integers instead of strings, and returns a date (not a string). answered Aug 18, 2015 at 10:52. g. GitHub Gist: instantly share code, notes, and snippets. For example, TRUNC (TO_DATE ('2013-08-05'), 'QUARTER') returns the first date in the third quarter of the year 2013, which is July 1, 2013. TRUNC(timestamp) Arguments. Working with DATE, TIMESTAMP, and INTERVAL in PostgreSQL can be confusing. PostgreSQL provides a number of functions that return values related to the current date and time. e. Be aware of corner case pitfalls with type timestamp (or date ) depending on the current time zone setting (as opposed to timestamptz ). amount), DATE_TRUNC('quarter', orders. date_trunc (format: str, timestamp: ColumnOrName) → pyspark. Increasing work_mem will speed up the sort though. SELECT EXTRACT (EPOCH FROM TIMESTAMP WITH TIME ZONE '2001-02-16 20:38:40-08'); Result: 982384720 SELECT EXTRACT (EPOCH FROM INTERVAL '5 days 3 hours'); Result: 442800. Ex:If I have 2010-01-01, I would like to return 2010-03-31, and so on. Finding the last date of the previous quarter from current date in PostgreSQL Ask Question Asked 477 times 0 For example: If my current date is 2022. So first the timestamp is converted to a date (that does not have a time), and then the time value is added to that, which yields a timestamp. The date_trunc(text, timestamptz) variant seems a bit under-documented, so here are my findings:. 000001 WHEN 'millisecond' THEN 0. g. Takes two arguments, the date to truncate and the unit of. Table 9. SELECT EXTRACT(QUARTER FROM TIMESTAMP '2001-02-16 20:38:40'); Result: 1 second. 789'); date_trunc 2020-04-01 00:00:00date_trunc('hour', timestamp '2001-02-16 20:38:40') 2001-02-16 20:00:00: extract. 33 shows the available functions for date/time value processing, with details appearing in the following subsections. table` GROUP BY ddate; LIMIT 100; and maybe withouth the LIMIT clause: SELECT ; DATE_TRUNC (date, < Parameters. Date/Time Functions. Example 2: Truncate a TIMESTAMP value to the beginning of the hour. trunc() will set that to 00:00:00 If you want a date/time value (=timestamp) where the time part is 00:00:00 then you can use current_date::timestamp or date_trunc('day', current_timestamp). 30 shows the available functions for date/time value processing, with details appearing in the following subsections. 32 shows the available functions for date/time value processing, with details appearing in the following subsections. Table 9. 9. Users coming from Oracle will recognize this one. @zach's answer is (perhaps) valid, however, it is hard to follow. 8. The quarter of the year (1 - 4) that the day is in. These SQL-standard functions all return values based on the start time of the current. age; current_date; current_time; current_timestamp; date_part; extract; localtime;. It may be ugly, but it sure works! Here is my query: SELECT Date, interval (trunc (date_part ('epoch', time)/1800) * 1800) AS HALFHOUR, SUM (Data) FROM Table GROUP BY Date, HALFHOUR; This seems to work great, and I don't see any performance hit either. atZone (ZoneId. column. functions. SELECT date_trunc. TRUNC(timestamp) Arguments. The quarter of the year (1–4) that the date is in SELECT EXTRACT(QUARTER FROM TIMESTAMP '2001-02-16 20:38:40'); Result: 1. Table 9. The date_trunc function allows values that aren’t obvious parts of timestamps, like week and quarter. 1 year and 2 months. 1. When storing a date value, PostgreSQL uses the yyyy-mm-dd format e. The function always returns a DATE. 2020-04-01 , and has the advantage that subsequent steps in the pipeline can read it like a normal date. To see the objects provided by the extension, run dx+ orafce. Oracle's DATE data type (which is what sysdate returns) always contains a time part which can not be removed. Table 9. Explained below with examples: Example 1: Fiscal Year system: Apr to Mar From Date: Jan-05-2008 To Date: May-15-2008. millenium. 2-1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 10. For example, decade 201 spans from 2000-01-01 to. Assuming you want all "overlapping" time periods, i. 8. Gets the number of intervals between two DATE values. Julian calendar date (integer days since local midnight on November 24, 4714 BC) Q: quarter: RM: Month in uppercase Roman numerals (I to XII; I is January) rm: Month in lowercase Roman numerals (i to xii; i is January) TZ: Uppercase time zone abbreviation ( to_char supported ) tz: Lowercase time zone abbreviation (only to_char. region, q2. date_trunc() also accepts other values, for instance quarter, year etc. Now, let us see the Date/Time operators and Functions. Then, removing a day will give you the date of the last day of the month of the provided date. May I make a request that "Quarter" should be treated as a valid Interval (as a synonym for "3 months"), to be consistent with other date functions that allow it, such as date_trunc() and extract() ? #1. AT TIME ZONE. The following query SELECT the_date FROM date_trunc('day', timestamp with time zone '2001-01-1 00:00:00+0100') as the_date results to the_date 2000-12-31 00:00 Is there a way to tell . date_trunc. 5. orm: dql: datetime_functions: date_trunc: YOUR_BUNDLE_HEREDoctrineExtensionsDateTrunc. 9. 9. The return value is of type timestamp with all fields that are less than. Truncating any date or timestamp to the month level will give you the first of the month containing that date. This function helps in manipulating numbers as required. For example: Truncating a timestamp down to the quarter returns the timestamp corresponding to midnight of the first day of the quarter for the input timestamp. A função DATE_TRUNC do Postgres pode nos ajudar a “truncar” uma data, bem, mas o que isso quer dizer? É simples, ela retorna a data inicial de um intervalo. date 、 time 、または timestamp を指定された精度に切り捨てます。. This is not by any means an exhaustive guide to date and time expressions in BigQuery. This query compares revenue per quarter for 2018. For formatting functions, refer to Section 9. currently I am coding the exact date for the last quarter, the quarter before and the quarter one year ago. If you want just the date in the current time zone, cast to a date. 9. 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。. create table. CREATE OR REPLACE FUNCTION round_time (timestamp with time zone) RETURNS timestamp with time zone AS $$ SELECT date_trunc ('hour', $ 1) + interval '5 min' * round (date_part ('minute', $ 1) / 5. , hour, week, or month and returns the truncated timestamp or interval with a level of precision. field selects to which precision to truncate the time stamp value. CREATE. Improve this answer. Use the date_trunc () function to get the first day of the quarter and then subtract one day. for example 2018-10-15 will be 2018-10-01 and 2018-10-30 also will be 2018-10-01. 11. Delaying Execution. date_trunc(text, timestamp) timestamp: Truncate to specified precision;. 3. But, 'quarter' is invalid for interval. g. You would need to use to_timestamp () if. 9. . Postgres examples include comparing years, quarters, day of week and rolling time periods. sales FROM Q2; Or, you could dispense with the CTEs and just use OR:. Table 9. yosihisa@jp. Split a string on a specified delimiter and return nth substring. DATE '2000-01-02'. dayofweek_iso 部分は、 ISO-8601データ要素と交換形式の標準に従います。 この関数は、曜日を1-7の範囲の整数値として返します。1は月曜日を表します。 他のいくつかのシステムとの互換性のために、 dayofweek 部分は UNIX 標準に従います。 この関数は、曜日を整数値として0-6の範囲で返します。On 29/10/2018 16:26, Andreas Karlsson wrote: > On 10/29/2018 04:18 PM, Vik Fearing wrote: >> A use case that I see quite a lot of is needing to do reports and other >> calculations on data per day/hour/etc but in the user's time zone. lead_id) as "# New Leads" from leads l where l. date_dim_id INT NOT NULL, date_actual DATE NOT NULL, epoch BIGINT NOT NULL, day_suffix VARCHAR(4) NOT NULL, day_name. That is easy enough to add. Connect and share knowledge within a single location that is structured and easy to search. Postgres has plenty of date-specific functions -- from date_trunc() to age() to + interval-- to support dates. Note that to_date () returns a date so your code would remove the just added time part again. Teams. For a date column: SELECT * FROM tbl WHERE my_date BETWEEN date_trunc('month', now())::date - 1 AND now()::date You can subtract plain integer values from a date (but not from a timestamp) to subtract days. 1. g. is out of the question as this forces quarters to start on Jan 1st and it has 'hardcoded' quarter starting dates (Apr 1st, Jul 1st, etc). This is used in subquery cal to generate a list of all dates in your data. Date_selector >) AS ddate, SUM (value1) AS value1FROM `project. You may try subtracting 3 months from the input date, and then check whether the resulting date fall within the first or second half of the year: SELECT CASE WHEN EXTRACT (month FROM input_date) - INTERVAL '3 MONTH' BETWEEN 1 AND 6 THEN 1 ELSE 2 END AS fiscal_half FROM yourTable; The trick. g. 5. The DATE type in PostgreSQL can store a date without an associated time value: PostgreSQL uses 4 bytes to store a date value. with ats (old_tz) as (select now() ) select old_tz, '2015-12-31'::timestamptz + (old_tz - date_trunc('day', old_tz)) new_tz from ats; OOPS. AS day_of_month, datum - DATE_TRUNC('quarter',datum)::DATE +1 AS day_of_quarter, EXTRACT. 0) $$. 9. I am trying to pull entries which happen after April 1st, 2019. 4. timestamp. Syntax. It's best explained by example: date_trunc('hour',TIMESTAMP '2001-02. orafce should be among them. 19, earlier I have made the following Query. 32 shows the available functions for date/time value processing, with details appearing in the following subsections. The LOCALTIME function takes one optional argument:. 1994-10-27. These SQL-standard functions all return. PostgreSQL DATE_PART () function is mainly used to return the part of the date and time; the date_part function in PostgreSQL will subtract the subfield from the date and time value. To group data by year, you can use the DATE_TRUNC function with ‘year’ as the first argument. 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. . 12,516 ExpertMod8TB. In fact extract() gets re-written to date_part() - check the execution plan and you will see. Explore options like 'second', 'minute', 'hour', 'day', or 'month' to tailor your data analysis. 9. g. CREATE TABLE dim_date ( dim_date_id INT NOT NULL, date_actual DATE NOT NULL, epoch BIGINT NOT NULL, day_suffix VARCHAR(4) NOT NULL, day_name VARCHAR(9) NOT NULL, day_name_tr VARCHAR(9) NOT NULL,. Table 9. Jimmy. You can fix a date or remove days from current day. 2. SELECT date_trunc('year', TIMESTAMP '2022-05-16 12:41:13. ). 1. A general solution for any time interval can be based on the epoch value and integer division to truncate. I am just highlighting the date modification part) ## 6 days interval "date_trunc ('month', created_at) + (date_part ('day', created_at)::int - 1) / 6 * interval '6 day'" ## 10 min interval "date_trunc ('hour', created_at) + date_part ('minute', created_at)::int / 10 * interval '10 min'". test=# CREATE STATISTICS mystats ON (date_trunc('day', t)) FROM t_timeseries ; CREATE STATISTICS test=# ANALYZE ; ANALYZE What you’ve just told the system is to create a sample for date_trunc(‘day’, t) and maintain this information just like simple column-related statistics. I can't believe the accepted answer has so many upvotes -- it's a horrible method. SELECT date, region, revenue FROM sales WHERE date = (SELECT MAX(date) from sales WHERE date between date_trunc('quarter', CURRENT_DATE)::date -. SELECT date_trunc($1, purchase_date) unit_of_time, SUM(total) FROM orders WHERE purchase_date >= $2 AND purchase_date <= $3 GROUP BY unit_of_time ORDER BY unit_time; [interval, startDate, endDate] The above query works correctly for when I pass in either 'month' or 'day' as the interval variable, but gives incorrect values. I have this problem. 'quarter' is valid for date_trunc() and extract() SELECT date_trunc ('quarter', now()); date_trunc-----2021-01-01 00:00:00+00 The DATE_PART () function extracts a subfield from a date or time value. I have the blow query that I'm trying to use in a BI tool. 1 Answer. Its Java equivalent is:Using the connect by trick for generating numbers you can extend that to generate dates and times…. Postgres’ DATE_PART and EXTRACT functions would previously evaluate to the same output. If you do want to use BETWEEN (which will only work properly if date is defined with the data type date) then you can use: select * from my_table where date between date_trunc ('year', current_date - interval '1 year')::date and date_trunc ('year', current_date)::date - 1. 2 (Ubuntu 13. but otherwise behaves similarly to DATE_TRUNC CASE TRIM(TRAILING 's' FROM LOWER( $1 -- in_unit )) WHEN 'microsecond' THEN 0. This is not by any means an exhaustive guide to date and time expressions in BigQuery. SELECT date_trunc. ). Thank you so much, Mr @GordonLinoff!!The quarter of the year (1–4) that the date is in SELECT EXTRACT(QUARTER FROM TIMESTAMP '2001-02-16 20:38:40'); Result: 1. Avg; Sum; Count; Min; Max; The below example shows that we are using an aggregate function. Functions and Operators. . CREATE OR REPLACE FUNCTION last_day(date) RETURNS date AS $$ SELECT (date_trunc('MONTH', $1) + INTERVAL. You can't cast tservice when creating the constraint. The function date_trunc is conceptually similar to the trunc function for numbers. It can also truncate the value to a specified. I've looked around and I can't figure out the right syntax for accessing the month and comparing with the current month. SELECT date_trunc ('month', cast (my_date as timestamp)) FROM my_table. DATE_TRUNC. Take two easy steps to create date_trunc: Break down the datetime into small parts (Year, Month, Day/Hour, Minute, Second) and extract the parts you need. EXTRACT, date_part EXTRACT(field FROM source) The extract function retrieves subfields such as year or hour from date/time values. order_date) AS interval FROM orders WHERE orders. DATE_SUB. If you need to, you can have your own in the following ways as a. DATE '2000-01-02'. functions. e. Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to. There is no function you want, but as said in postgresql wiki you can define function for youself: CREATE OR REPLACE FUNCTION round_time_10m (TIMESTAMP WITH TIME ZONE) RETURNS TIMESTAMP WITH TIME ZONE AS $$ SELECT date_trunc ('hour', $1) + INTERVAL '10 min' * ROUND (date_part ('minute', $1) / 10. You can't cast tservice when creating the constraint. 436'); Sample Output:. EXTRACT (field FROM source) The extract function retrieves subfields such as year or hour from date/time values. It's much better to materialize separate columns for the year, quarter and year-quarter from the_date column, as is suggested in one of the comments. Add 1 if you prefer 1 - 12. datepart and timestamp, and. 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 ). Finding events relative to the present time with NOW () and CURRENT_DATE functions. Here’s a bit of code adapted from the PostgreSQL wiki that I like for creating the ever necessary date dimension in PostgreSQL. Postgres has plenty of date-specific functions -- from date_trunc() to age() to + interval-- to support dates. You. 27 illustrates the behaviors of the basic arithmetic operators ( +, *, etc. I am thinking of defining variables with reference to current date. It’s possible in Postgres to truncate or round a given timestamp to some given level of precision. values date_trunc ('HOUR', TIMESTAMP ('2017-02-14 20:38:40. 9. The DATE_PART() function extracts a subfield from a date or time value. to_char and all of the formatting functions let you query time however you want. date_trunc. The DATE_TRUNC () function in Postgres truncate a date or time value to a specific precision. The date_part function is modeled on the traditional Ingres equivalent to the SQL -function extract: The precision values are a subset of the field identifiers that can be used with the EXTRACT() and DATE_PART() functions. 9. 1. Section 9. It is only meant as a quick reference to those I use most often. You should be familiar with the background information on date/time data types from. date, q2. Date/Time Functions and Operators. If you want both quarter and year you can use date_trunc: SELECT date_trunc('quarter', published_date) AS quarter This gives the date rounded to the. Try this one: select to_char (trunc_date,'FMMonth YYYY') from ( select distinct date_trunc ('month', orderdate) as trunc_date from table order by trunc_date desc ). g. Date: 20 July 2000, 05:00:19. Table 9. Thank you so much! Keep safe everyone. dataset. The range of DATE datatype is from 4713 BC to 5874897 AD. PostgreSQL's date_trunc in mySQL Ask Question Asked 12 years, 7 months ago Modified 10 months ago Viewed 43k times 26 Recently, I have been getting familiar. The problem with the selected solution is that make the month configurable so that the quarter can start at any month is not possible; you have to change the query to change the starting month. 4 or later. We are also looking at upgrading to a newer version of Postgres but that is further out. It can be of timestamp, timestamptz, or interval type.