If you want to check a value against of date ranges, you should use the literal date in ISO 8601 format i. Here’s how you can do it: SELECT TO_CHAR (your_date_column, 'YYYY-MM-DD') AS date_string FROM your_table; your_date_column is the name of the date column you want to convert to a string. Example 3: PostgreSQL TRUNC() function. Issue in creating a function in PostgreSQL using date_trunc. PostgreSQL interval data type value involves 16 bytes storage size, which helps to store a period. 0. The corresponding function in PostgreSQL here is date_trunc. If you have an index on some_timestamp and you search for date_trunc('day', some_timestamp) = DATE '2012-01-01', PostgreSQL can't use the index. The result should be change to the nearest time i. The PostgreSQL date_trunc() function truncates a specified timestamp or interval value to the specified part and returns the result. confusingly at time. Load 7 more. config. For formatting functions, refer to Section 9. See Postgres Date/Time Functions and Operators for more info The simplest form of the TRUNCATE TABLE statement is as follows: The following example uses the TRUNCATE TABLE statement to delete all data from the invoices table: Besides removing data, you may want to reset the values in the identity column by using the RESTART IDENTITY option like this: For example, the following statement removes all rows. CREATE INDEX ON. (Expressions of type date are cast to timestamp and can therefore be used as well. Truncate can be rolled back. 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). Postgres 11 adds essential functionality. 6. 98 . Table 9. First, we have the date part specifier (in our example, 'month'). Count data using multiple date. start_date) <= DATE_TRUNC ('day', q. 9. If you want to know how many. For example, if I have a table that looks like this. Unless otherwise noted, operators shown as. A bigint is not "a timestamp", so you must convert the number to a date before you can apply date_trunc () on it: Select date_trunc ('day', to_timestamp (rp. DATE_PART関数 日付要素を数値で求める. postgresql query to return the day of the week of the first day of the month two years from today. 0. 2 do mention both forms though. Expressing PostgreSQL timestamps without zones in local time. Viewed 11k times. time_zone Hibernate property to the value of UTC. In PostgreSQL, the DATE_TRUNC function is used to truncate a date, time, or timestamp value to a specified precision. It will not convert the value to a date. I just sent a note about that to the pgsql-docs mailing list so hopefully it will be fixed soon. PostgreSQL : Converting timestamp without time. Trimming trailing :00 from output after date_trunc. PostgreSQL provides a number of functions that return values related to the current date and time. This can be done via the persistence. the_date 2000-12-31 00:00 Is there a way to tell date_trunc to do day/month/year conversions based on the timezone it is feeded with? The expected output would be: 2001-01-1 00:00+0100Postgresql SQL GROUP BY time interval with arbitrary accuracy (down to milli seconds) I want to aggregate data at 5 minute intervals in PostgreSQL. If I use the date_trunc() function, I can aggregate data at an hourly, monthly, daily, weekly, etc. How to import CSV file data into a PostgreSQL table. Exercise care with lower. This is my two cents using ISO weeks (first day is monday, with dow = 1). These functions all follow a common calling convention: the first argument is the value to. The date_trunc function contains the two input parameters, i. Take a look at AT TIME ZONE described just below date_trunc in the link above, you could use something like. The following table lists all window functions provided by PostgreSQL. For instance, the “BETWEEN” clause, the “DATE_TRUNC()” function, and the basic comparison operators like “=”, “!=”, “>=” etc. PostgreSQL: truncate hour/min/second from a timestamp. g. 9. 000000 Expected: 1967-12-04 00:00:00. I want something in between like 100 milliseconds (1/10 second). This is used in subquery cal to generate a list of all dates in your data. 8. 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). However, DATETIME_TRUNC with the ISOYEAR date part truncates the datetime_expression to the beginning of the ISO year, not the Gregorian calendar year. 1: Date/Time Types. the Use of the DATE_TRUNC () Function in PostgreSQL. ). So fellow SQL aficionado's how to take the following WHERE clause in PostgreSQL and convert it to SQLite3 without using a compiled extension: WHERE DATE_TRUNC ('day', c. We typically have to calculate ages in business applications e. 7. Use the below command: SELECT date_trunc ('week', timestamp'2021-08-23 19:14:20'); Postgresql date_trunc week. 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. 次のように実例を示すとわかりやすいです。. SELECT '2022-09-18':: date + INTERVAL '1 year'; In the above code, We have used typecast (::) operator to convert a value of one datatype into. SELECT TRUNC(CURRENT_TIMESTAMP) Postgresql. - The value for the field. You can either use one of the Postgres date functions, such as date_trunc, or you could just cast it, like this: SELECT timestamp '2009-12-22 11:01:46'::date >>> 2009-12-22. 000000の場合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. Below is the syntax of the TRUNCATE command:. This apply to 15, 30 and 45 as well. PostgreSQL provides a number of functions that return values related to the current date and time. Truncating any date or timestamp to the month level will give you the first of the month containing that date. Try " Select now () ", it will give you the system timestamp. 9. Subtract one month from the current month, then "truncate" that to the beginning of that date. Postgresql date subtract. CREATE FUNCTION TRUNC ( dttm TIMESTAMP ) RETURNS TIMESTAMP AS $$ SELECT DATE_TRUNC('DAY',$1); $$ LANGUAGE SQL IMMUTABLE; select TRUNC(NOW()::timestamp); 12. Query between two dates and two times. 2. serpid GROUP BY date_trunc ('month', s. I will get the same. 4 or [email protected]. 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. But the week starts on Monday in Postgres by default. your_table is the name of the table where the date column resides. Modified 10 years, 9 months ago. But what exactly are you trying to achieve there? can't you just use intime - (current_date - 1) and use the resulting interval – user330315date_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。 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。 このクエリを実行すると以下の結果が得られる。The field DATE in the database has the following format: 2012-11-12 00:00:00 I would like to remove the time from the date and return the date like this: 11/12/2012. A primer on working with time in Postgres. The documentation of extract clearly states:. Asked 10 years, 9 months ago. For example, if I have 2011/05/26 09:00:00, I want 2011/05/26. Table 10-4. The values in the datetime column include seconds. Otherwise, the function returns a numeric value if both arguments are used. It is worth noting that the function list (table 9-27) doesn't mention date_trunc(text, interval) form of date_trunc, it only lists the date_trunc(text, timestamp) version. Otherwise, the result has the same day component as date. Notes: it looks like you have numbers stored as text. date_created) )AS DAY, this is my output 2013-02-04 00:00:00+00. You need to_char () to format a date or timestamp. 76 1. Example. (Values of type date and time are cast automatically to timestamp or interval, respectively. I am trying to get only date without time in postgres from the following statement: select current_date - date_trunc ('day',interval '1 month'); But returns me that: 2023-02-07 00:00:00. PostgreSQL 错误：函数date_trunc（没有时区的时间戳）不存在 在本文中，我们将介绍 PostgreSQL 数据库中的一个常见错误：函数 date_trunc(timestamp without time zone) 不存在。我们将详细解释该错误的原因，并提供解决方法和示例说明。 阅读更多：PostgreSQL 教程 PostgreSQL 中的日期和时间函数 PostgreThe query below shows sample data of your user adding an other user with a session over two days (to demonstrate the principle) The subquery day_cnt calculates the minimal start date of the sessions and the count_days that is covered with the sessions. date_trunc ('month',current_date) + interval '1 month' - interval '1 day'. PL/pgSQL Depends on. The best way to reset a sequence to start back with number 1 is to execute the following after you have successfully truncate it: ALTER SEQUENCE <tablename>_<id>_seq RESTART WITH 1. 8) Postgres DATE_TRUNC() Function. Covers all your examples. 0. 9. The function date_trunc is conceptually similar to the trunc function for numbers. Date and time input is accepted in almost any reasonable format, including ISO 8601, SQL -compatible, traditional POSTGRES, and others. We’ll create three methods using several Spring Data JPA features: public interface ArticleRepository extends JpaRepository <Article, Integer> { List<Article> findAllByPublicationDate(Date publicationDate) ; List<Article. Here are the function prototypes: FROM_UNIXTIME () – convert a unix time date into a normal date. 1. date_trunc('hour', timestamp '2001-02-16 20:38:40') → 2001-02-16 20:00:00:. 9. 9. of users" FROM logins WHERE created > now() - interval '3 months' GROUP BY 1 ORDER BY 1; Now my Date-value is inside a JSONB column called extras. As far as I understand you want to change the day of the month to 8. Use the below command: SELECT date_trunc ('week', timestamp'2021-08-23 19:14:20'); Postgresql date_trunc week. Create Postgresql index with date_trunc. How to DATE_TRUNC by 10 days. Table 9. 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). ADVERTISEMENT. 0. ) from a date, time, or timestamp value. 2. 17. g: 2013-05-03) or date with time (e. I'd suggest that you actually follow the advice from Postgres, rather than changing your data. One truncates a date to the precision specified (kind of like rounding, in a way) and the other just returns a particular part of a datetime. 9. EXTRACT, date_part EXTRACT(field FROM source)The extract function retrieves subfields such as year or hour from date/time values. 963179 secs juin 2, 2022, 12:00 AM | 0 years 0 mons 0 days 0 hours 2 mins 34. date_trunc ( text, timestamp) → timestamp. Viewed 11k times. 31 illustrates the behaviors of the basic arithmetic operators ( +, *, etc. Current Date/Time. The function date_trunc is conceptually similar to the trunc function for numbers. I just sent a note about that to the pgsql-docs mailing list so hopefully it will be fixed soon. 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. PostgreSQL - Date Difference in Months. I have to convert a postgres query to Sequelize query. PostgreSQL Date Functions (and 7 Ways to Use Them in Business Analysis) Facebook's Aha Moment Is Simpler Than You Think. (In our example, we used month precision. 19, earlier I have made the following Query SELECT DATE_TRUNC ('minute', some_date) FROM some_table; This was working. 876944') * 1000; would give. PostgreSQL provides a number of functions that return values related to the current date and time. g. The remaining datetime functions were designed to accept any of the three types of data (date, timestamp, and interval) and to return a value of one of these types. SELECT my_date::date::timestamp. 8 but with no luck. How to use the PostgreSQL Date Function: Date_Trunc. Truncate to specified precision; see Section 9. thedate), r. PostgreSQL 错误：函数date_trunc（没有时区的时间戳）不存在 在本文中，我们将介绍 PostgreSQL 数据库中的一个常见错误：函数 date_trunc(timestamp without time zone) 不存在。我们将详细解释该错误的原因，并提供解决方法和示例说明。 阅读更多：PostgreSQL 教程 PostgreSQL 中的日期和时间函数 PostgreThe query below shows sample data of your user adding an other user with a session over two days (to demonstrate the principle) The subquery day_cnt calculates the minimal start date of the sessions and the count_days that is covered with the sessions. You can either use one of the Postgres date functions, such as date_trunc, or you could just cast it, like this: SELECT timestamp '2009-12-22 11:01:46'::date >>> 2009-12-22. The date_trunc function uses field either millisecond or second, but millisecond is too small for me and second too large. Truncate all the data in the table and just let the data of the last 6 months. Below is the example, and the syntax of the date_trunc function is as follows. The time zone is variable. But there is also no point in casting date literals to date as input parameter. for 00:00 to 07:29 minute will be round down to 00:00 and 07:30 to 15:00 will be round up to 15:00. SELECT (date_trunc ('MONTH', '2019-02-28'::timestamp) + INTERVAL '2 MONTH - 1 day'); Note: If you are using this in a query then you are probably better to get the first day of the following month so your query can say where xxx > month1 and xxx < followingmonth (otherwise you end up losing the last days data). ) field is an identifier or string that selects what field to extract. Relating to this question. date_trunc() Examples. PostgreSQL -> SQLite: DATE_TRUNC Equivalent. PostgreSQL (and I think, SQL in general) uses "EXTRACT (EPOCH FROM ts)" to get this value. Note there can be ambiguity in the months returned by age because different months have a different number of days. date | interval juin 1, 2022, 12:00 AM | 0 years 0 mons 0 days 0 hours 1 mins 58. You should be familiar with the background information on date/time data types from. 0. Table 9. 2 Answers. SELECT * FROM stud_cmp WHERE DATE_TRUNC('day', start_date) = '2020-01-01'::timestamp; 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 $$ SELECT date_trunc('hour', $1) + INTERVAL '10 min' * ROUND(date_part('minute', $1) / 10. Share. , are used in Postgres to store and manipulate the dates. Note that some aggregate functions such as AVG (), MIN (), MAX (), SUM (), and COUNT () can be also used as window functions. How to use the date_trunc function for biweekly grouping. PostgreSQL specify that. PostgreSQL provides a number of functions that return values related to the current date and time. date_trunc ('day', yourtimestamp) will return a timesamp, but with hours, mins and secs to zero. As you don't want to include rows from "this" month, you also need to add a condition for that. The date_trunc function truncates a TIMESTAMP or an INTERVAL value based on a specified date part e. com> Reviewed-by: Tom Lane. Usage examples -`to_date`: Converting a non-standard date string: SQL. SPLIT_PART. ) field selects to which precision to truncate the input value. Then, removing a day will give you the date of the last day of the month of the provided date. pdb = conversion to double precision - all decimals restored. 8. If I want to group a column of timestamps, say registered_at by the day on which they occurred, I can use either date_trunc('day', registered_at) or registered_at::date. The following illustrates the syntax of the AGE () function: The AGE () function accepts two. See full list on database. data for 2); return NEW; end; $$; create trigger mytable_data_truncate_trigger before insert or. It looks like this: select date_trunc('month',now()). 9. To add a new column to a table in PostgreSQL, you can use the ALTER TABLE statement with the ADD COLUMN clause. created_at)) day when @timeinterval = 'year' then makedate (year (u. When dealing with dates, it accepts as a parameter a Template Pattern for Date/Time (see link above) then a timestamp, and returns a timestamp. 0 to two decimal places. 3 Answers. How to use the date_trunc function for biweekly grouping. Here’s the current timestamp. ) field selects to which precision to truncate the input value. It performs the same function as a DELETE statement without a WHERE clause. Date | T_time January 1, 2022, 12:00 AM | 0 years 0 mons -51 days -24 hours -21 mins -21. 19, earlier I have made the following Query. rank) FROM serps s LEFT JOIN ranks r ON r. Simply use MONTH () function. I see that date_trunc function returns timestamp and intervals cannot be cast to date type: select current_date -. SELECT CURRENT_TIMESTAMP::DATE If you need to use culture specific formatting in your. 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). 0. g. 3. In PostgreSQL, the Interval is another type of data type used to store and deploy Time in years, months, days, hours, minutes, seconds, etc. Date_Trunc varies parts of the date/time: century, year, month, day, hour, minute, second, millisecond,. yml. If you phrase your query as:Essentially, time_bucket() is a more powerful version of the standard PostgreSQL date_trunc() function. See Section 13. The conclusion therefore is that TRUNCATE is unbeatable if you want to delete all rows. DATE_TRUNC('datepart', timestamp) Arguments. 4 shows the mathematical operators that are available for the standard numeric types. - Return Type: TIMESTAMP. 24. and while the condition is > '2018-10-01' then all dates in the month October will not be shown in the result. This function truncates a date/time value to a specified precision. For formatting functions, refer to Section 9. 1. date) going over the. Day 1. 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. Table 9-2 shows the available mathematical operators. 299. The output snippet shows that the DATE_PART() function pulls out the year from the given date. Table 9-26 illustrates the behaviors of the basic arithmetic operators ( +, *, etc. Mathematical Functions and Operators. PostgreSQL has the time zone name MET (UTS offset. If PostgreSQL supported RANGE in window functions this would be considerably simpler than it is. g. select current_time - interval '1' hour. It can also return a number truncated to the whole number if no precision is defined. Truncate to specified precision; see Section 9. This is a timestamp with time zone value which refers in fact to. 4. CREATE OR REPLACE FUNCTION round_time_10m(TIMESTAMP. 9. So fellow SQL aficionado's how to take the following WHERE clause in PostgreSQL and convert it to SQLite3 without using a compiled extension: WHERE DATE_TRUNC ('day', c. This generates a timestamp value, that you can cast if you. Use the aggregate FILTER clause in Postgres 9. The following example shows how to use the date_trunc() function to truncate a timestamp value to hour part, as follows: Introduction to the PostgreSQL date_trunc function. Add a comment. Syntax. Partition by date range PostgreSQL scans all partitions. The date_trunc function uses field either millisecond or second, but millisecond is too small for me and second too large. Modified 10 years, 9 months ago. The PostgreSQL date_trunc() function truncates a specified timestamp or interval value to the specified part and returns the result. 1 Truncate a date in Postgres (latest version) 0 PL/PGSQL function - passing a TEXT argument to date_trunc() 0 custom DATE_TRUNC timeframes. 9. Remove milliseconds in SQL commands. The query will return a result with a single column labeled “uptime” that represents the duration of the PostgreSQL database server’s uptime. In PostgreSQL, the DATE_BIN () function enables us to “bin” a timestamp into a given interval aligned with a specific origin. This can be handy when we want to truncate a timestamp to a given interval, for example a 10 minute interval. Replicate Oracle's `TRUNC(DATE, 'WW')` behaviour in PostgreSQL. When a date is the start date of a week adding 6 (1 + 5) days will move the date to the last date of the week. date_trunc PostgreSQL function equal for mySQL. I want this to be just 2013-02-04. Get subfield. date_trunc can be really helpful if you want to roll up time fields and count by day or month. TRUNCATE is not MVCC-safe. Trunc date field in mysql like Oracle. Caused by: org. 9. Assuming data type timestamp. The following illustrates the syntax of the PostgreSQL TRUNC() function:. It's based on a subset of the sample data because of limitations in SQLFiddle for Oracle. Here's the correct way to do it, with date_trunc: SELECT date_trunc ('month', txn_date) AS txn_month, sum (amount) as monthly_sum FROM yourtable GROUP BY txn_month. It will not convert the value to a date. Specifying the time zone in date_trunc is not supported in Postgresql 11. Table 9. The PostgreSQL TRUNC() function returns a number truncated to a whole number or truncated to the specified decimal places. (Values of type date and time are cast automatically to timestamp or interval, respectively. Extract isn't quite the same as date_trunc though. 5 for more details. I am using PostgreSQL 9. If it is, then: It might not be obvious, but my example is using numeric - this is the type the parser interprets 9. CURRENT_TIME関数 現在の時刻を求める. We’ll use it for different intervals to see the result. ) field selects to which precision to truncate the input value. For types without common mathematical conventions for all possible permutations (e. The return type of the date_trunc function is a timestamp. 2. When used to aggregate data, it allows you to find time-based trends like daily purchases or messages per second. Isolating hour-of-day and day-of-week with EXTRACT function. Getting results between two dates in PostgreSQL. TRUNC() function returns the result as a numeric data typeMy SQL is: SELECT date_trunc('week', '2020-06-01'::timestamp)::date ||'-'|| (date_trunc('week', '2020-06-01'::timestamp)+ '6 days'::interval)::date; However, using. An alternative pproach is to use to_char function. Description. Neither of those expressions will make use of an index on created - you would need to create an expression based index with the expression used in your queries. To get week start and end date (as 0 for Monday and 4 for Friday): select cast (date_trunc ('week', current_date) as date) + 0 || '-->' || cast (date_trunc ('week', current_date) as date) + 4; 2015-08-17-->2015-08-21. SELECT TO_CHAR(timestamp_column, 'YYYY-MM-DD HH24:MI') AS formatted_ts FROM table_name;. UPPER関数 大文字に変換する. Return the relative rank of the current row. 1. Use text type with trigger instead: create table mytable ( data text ); create or replace function mytable_data_trunc_trigger () returns trigger language plpgsql volatile as $$ begin NEW. Functions and Operators. 1. It is worth noting that the function list (table 9-27) doesn't mention date_trunc(text, interval) form of date_trunc, it only lists the date_trunc(text, timestamp) version. Here’s the current timestamp. out. date_trunc('hour', timestamp '2001-02-16 20:38:40') → 2001-02-16 20:00:00. 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: 9. Truncate table with date time older than n days. PostgreSQL provides a number of functions that return values related to the current date and time. , hour, week, or month and returns the truncated. , hour, week, or month and. 2. Table 9. Client can search over this field with only date (e. 31 illustrates the behaviors of the basic arithmetic operators ( +, *, etc. The "epoch" of a timestamp represents the number of seconds elapsed since a certain time and date (1st Jan 1970, 00:00:00). the postgres server timezone. DATE_TRUNC() will return an interval or timestamp rather than a number. 9. The most frequently used Postgres date functions and business scenarios where they come in handy: Rounding off timestamps with DATE_TRUNC function. Teams. 1. –However, you can set the time portion of a timestamp, dropping the date portion entirely with date_trunc. I think the shortest and most elegant way to solve this issue is to use date_trunc ('quarter',d) (which will retrieve the start of the quarter) + 3 months - 1 day, and use the expression to create a FUNCTION: CREATE FUNCTION end_of_quarter (d date) RETURNS date AS $$ SELECT CAST (date_trunc ('quarter', d) + interval '3 months' -. For example I need to get number of sales each week. Table 9. 30 shows the available functions for date/time value processing, with details appearing in the following subsections. 1305621628876. I need it to be a postgresql DATE type so I can insert it into another table that expects a DATE value. trunc () will set that to. Clearly, that column with a 2k character long string shouldn't be indexed -- or not with a btree. serpid = s. If we need table data on per daily basis then we use PostgreSQL group by day in PostgreSQL. trim the time out of the range. 9. We have used the date_trunc function with the where clause to compare the date in PostgreSQL as follows. If you want to get the start of the current month, use date_trunc, eg: SELECT date_trunc('2013-01-12'); will return 2013-01-01. In postgres, you could phrase this as: date_trunc ('quarter', current_date) + interval '3 months' - interval '1 day'. 0. The basic syntax of the DATE_TRUNC function is as shown below: DATE_TRUNC(precision, source);. TRUNCATE is not MVCC-safe. println("Everything is ok"); return result; and I see "Everything is ok" on the console. ). You must run the following PostgreSQL query to make the “Date Part” function complete this task:date_trunc ( text, timestamp) → timestamp. The PostgreSQL date_trunc rolls up the date to the first instance of the date depending upon the granularity ( day, week, month, etc. Modified 1 year, 1 month ago. SELECT * FROM stud_cmp WHERE DATE_TRUNC('day', start_date) = '2020-01. Checkout DoctrineExtensions. If I use it like ths: select trunc(now(),'MM'). when querying the data, explain shows that all partitions are being queried when I'm constructing a date with date functions, whereas when I use hard coded dates only the targeted partitions are being scanned. SELECT DATE_TRUNC('minute', some_date) FROM some_table; This was working fine but I got to know that index made on some_date column will be futile because indexes doesn't work with DATE_TRUNC(), Index created was as follows : Description. Because a TRUNCATE is DDL it involves two commits, one before and one after the statement execution. PostgreSQL Date Functions (and 7 Ways to Use Them in Business Analysis) Facebook's Aha Moment Is Simpler Than You Think. 1. Either truncate the timestamp by minutes using date_trunc, which will return a timestamp without seconds, or use to_char if it is only about formatting the output: SELECT date_trunc ('minute',VISIT_DATE) FROM t; SELECT to_char (VISIT_DATE,'yyyy-mm-dd hh24:mi') FROM t; Demo:In Postgresql, to truncate or extract the week of the timestamp value, pass the week as a string to the date_trunc function. 9. -- date_trunc（日付の切り捨て）の構文 date_trunc( 精度 , 日付・時刻 ); 精度には'year'、'month'、'day'等を指定します。. for example 2018-10-15 will be 2018-10-01 and 2018-10-30 also will be 2018-10-01. In Postgres, the TRUNC() function accepts a numeric value as an argument, trims the fractional part, and retrieves the resultant integer: TRUNC(val_1, val_2); Here, the first argument indicates the input number, while the second argument determines the number of digits to be trimmed. Oracle's DATE data type (which is what sysdate returns) always contains a time part which can not be removed. 2. postgres sql, date_trunc without extra zeroes. Works with PostgreSQL. answered Aug 18, 2015 at 10:52.