timestampdiff (a text,b timestamp, c timestamp ) RETURNS INT AS $$ BEGIN case when a=second then datediff (second,b,c) when a=minute then datediff (second. CREATE TABLE TEMP name of the table (name of the columns along with their data types); Where all the. Note: As TT rightfully wrote in his comment,. Because it addresses very different requirements, the specialized data storage schema and query execution engine that Amazon Redshift uses are completely different. In Redshift, you can use datediff () and arithmetics: select t. Find centralized, trusted content and collaborate around the technologies you use most. Run the following query to. The fully timestamp values contains default value as (00) for missing seconds. The external table statement defines the table columns, the format of your data files, and the location of your data in Amazon S3. Categories: Date/Time. Amazon Redshift stores these snapshots internally in Amazon S3 by using an encrypted Secure Sockets Layer (SSL) connection. 2. 0 / 60 / 24 as diff from mytable t. If you want to get the difference between two dates in days (i. The. This function returns the count (as a signed integer value) of the specified datepart boundaries crossed between the specified startdate and enddate. A column or expression that evaluates to a data type of TIMESTAMP, TIMESTAMPTZ, TIME, or TIMETZ. Currently, my code just returns zero on the right side of the decimal place. Find out key distinctions in architecture, performance, scaling, pricing—and more! SELECT * FROM schemaName. SELECT DATEDIFF (week,'2019-01-01','2019-12-31') as numweeks; I need to analyze the time interval difference from two dates in Amazon-Redshift, for example: '2021-10-13 14:37:00' - '2021-10-13 12:00:00' = '02:37:00' or in case the days is different: Part of AWS Collective. *, (case when description = 'logged in' and next_description = 'logged out' then datediff (second, timestamp, next_timestamp) end) from (select wa. usa_start_datetime::timestamp,u1. The first expression in a range condition must be the lesser value and the second expression the greater value. The parameterized snippet below can be used to find the number of weekdays between 2 dates. 25 from dual; Results in: 2023-05-01 06:00:00 I want to convert the above SQL to redshift runnable but failed Stack OverflowThe term numeric is used generically to refer to integer, decimal, and floating-point data types. eg: each ndc has fill_nbr = 1 as the initial fill. select dateadd (m,30, '2008-02-28' ); date_add --------------------- 2008-02-28 00:30:00 (1 row) You can name date parts in full or abbreviate them. We named this one. SQL Server: -- Get difference in days SELECT DATEDIFF (dd, '2022-09-01', '2022-09-05'); # 4. Returns the <date> with the specified number <interval> added to the specified <date_part> of that date. WITH DateCte AS ( SELECT idcode, mydatetime, RANK () OVER ( ORDER BY idcode) AS CurrentRank, (RANK () OVER ( ORDER BY idcode) + 1 )AS NextRank FROM Table1 ) SELECT ce. Now on the first interval I select the original date_start same as the last interval I use date_end. ADVERTISEMENT. Redshift joins is used to retrieve data from two or multiple tables using join conditions. To be clear, I need any year fraction as well (ie. select * from tableA where to_char (date,"yyyyMMdd") = "20221220". 3. g. Arguments. TableName WHERE datetime > '2017-02-09 00:00:00' AND datetime < '2017-06-09 00:00:00'; The above query Works with Redshift to fetch all the entries in a table. A data type constrains the set of values that a column or argument can contain. Comparison conditions state logical relationships between two values. How to use Redshift DATEDIFF? 7. 特に、DATEDIFF は 2 つの式の間で越える日付部分の境界の数を決定します。. Example 5: Use Current Date. In my Redshift table I have 2 columns that stores timestamp values: start_date_time and end_date_time. Some of the most useful functions in Postgres implementations of SQL (like Amazon Redshift)are DATE_DIFF and DATE_TRUNC: DATE_DIFF gives the amount of time that has elapsed between two different dates. The time zone for the return value. If the first date is later than the. The rub is that one date is a converted integer value in YYYYMMDD format and the second date field is a timestamp. DATEDIFF determines the number of date part boundaries that are crossed between the. g. 543081, my output should be 2019-03-01 11:17:57. Part of AWS Collective. Use the TIMESTAMPTZ data type to input complete timestamp values that include the date, the time of day, and a time zone. ; startDate: A DATE or TIMESTAMP expression. Amazon Redshift is specifically designed for online analytic processing (OLAP) and business intelligence (BI) applications, which require complex queries against large datasets. Month name (uppercase, mixed-case, lowercase, blank. select to_date ( '20010631', 'YYYYMMDD', FALSE ); The result is July 1, 2001, because there are only 30 days. how to get datediff of less than 6 days for same equipment. This would be equivalent. Instead of using SUBSTRING, pass the entire date-time field to the TO_DATE function with the MM-DD-YYYY format which encapsulates all 3 formats above. For example, the join condition pg_database. SELECT COALESCE(NULL, 'Amazon Redshift', 12); ERROR: invalid input syntax for integer: "Amazon Redshift". Side-note: In Redshift, CHARACTER VARYING is the same as TEXT, so you might as well use TEXT since it is shorter. redshift datediff not working when current_timestamp is used but working when getdate() function is used. Also have a dates table with all calendar dates that can be utilized. Hi Team, The formula below was built as a beastmode but would like to move it to dimensions, the backend. If one of the operands is a floating-point number, then Amazon Redshift promotes the other operand to a floating-point number and. DATEDIFF with datepart function in Redshift SELECT DATEDIFF(year, '2021/08/25', '2027/08/25' ) AS DateDiff; -- Returns 6 DATEDIFF with datepart function equivalent in. In SSMS I would have done: SELECT DATEADD (yy, DATEDIFF (yy, 0, GETDATE ()), 0) AS StartOfYear. Snowflake: DATEDIFF('day', start, stop) AS days Talha September 20th, 2021 Redshift is a completely managed data warehouse service offered by Amazon Web Services. ) and divide by 365 I get an (undesirable) answer of 1. So, your query should be: select email, createddate, lastloggedin, datediff (minute, createddate, lastloggedin) from udb. Why is. As data continues to grow and become even more important, they. After you run a query, a Result tab appears with the results. createddate) AS age1 FROM table2 LEFT JOIN table1 ON table2. Objective: Find the datediff for the two dates given. Elastic resize is the fasted way to resize the cluster. The values in the CALDATE column are dates. Feat (redshift,presto): transpile DATEADD, DATEDIFF to presto #1746. idcode, DATEDIFF (minute, ce. DATEDIFF determines the number of date part boundaries that are crossed between the two expressions. BigQuery also supports a separate DATE_DIFF function that will return the difference between two date types, unlike the DATETIME_DIFF that only supports the datetime type. Implementing DATEDIFF in Redshift simply computes the difference between two dates or timestamps. An event 13. datepart. DATEDIFF. date 2. Syntax TO_DATE ( string, format) TO_DATE ( string, format, is_strict) Arguments string A string to be converted. 000' SELECT CAST (@EndTime - @StartTime as Time) As TimeDifference. This question is in a collective: a subcommunity defined by. g. TIME: Only the time part. 1. The example above shows the result of DATE_DIFF for two days in succession. So the logic behind this is, i would need to break the total number of hours per day. A date field or a call to another function that outputs a date. So, you cannot do what you want that simply. db_id matches the internal database object ID for each PG_DATABASE. However, we will have to exclude. For a complete listing of all statements run by Amazon Redshift, you can query the SVL_STATEMENTTEXT view. 分析対象SQLの実行. 9x to 3. date, d. 例えば、 12-31-2008 と 01-01-2009 の 2 つの日付間で年の差を計算しているとします。. Value a is less than or equal to value b. state and a. select 42602 * interval '1 second'; which return 11:50:02 the proper answer. 具体而言，DATEDIFF 确定在两个表达式之间交叉的日期部分边界的数量。. general direction might looks like that, although it might require some tuning on a real data I guess. DATEADD ('week', 1, [due date]) Add 280 days to the date February 20, 2021. With the argument ALL, the function retains all duplicate values from the expression for. 1. Create 1 day ranges new_start and new_end. AWS Redshift vs Snowflake: A quick comparison. For example, the following code would give the number of days between date1 and date2: DATE_DIFF is great for calculating the. 0. You may change this: AND be. The TRUNC function removes the time of day from the result of ADD_MONTHS. select distinct trunc (add_months (caldate,. Specify an OLE DB server type other. To use it use the following syntax: DATEDIFF (part, start, end) This is the documentation for the Amazon Redshift Developer Guide - amazon-redshift-developer-guide/r_DATEDIFF_function. We can create a temporary table in redshift by simply prefixing the name of the table in create table command with a keyword temp. Redshift Create Table; Redshift DateDiff; ADVERTISEMENT. DATEDIFF returnes the number of full weeks between the datetime values. That isn't the same. Range. 日付と時刻の両方が必要な. Method 1: Querying Data in Redshift using AWS Query Editor. CDT. amazon-redshift; typecasting-operator; or ask your own question. The arguments are <date1> and <date2>. Now I am trying to make this query dynamic such that it can give me count for past 6 weeks something like below as an output: Count Week ------------ 124 W43 125 W42 126 W41 127 W40 128 W39 129 W38. 90) within group (order by datediff(day, START_DATE, END_DATE) I am guessing that the problem is the date difference. This function is especially useful for calculating intervals, such as the number of days between two dates or the hours between two timestamps. 1 Answer. Understanding Athena vs Redshift Pricing. datediff is always 1 number less than I need-5. Each node will have a slightly different clock and the network time to talk to each other will also affect comparisons. timestamp. You may change this: AND be. PostgreSQL - Date Difference in Weeks. In case this doesn’t work, reboot your cluster. Ex: If start_date = 1/1/2016 15:30 and end_date = 2/1/2016 00:30 then I need the break up with group by start_date: 8+0. DATE_DIFF with the date part WEEK returns 1 because DATE_DIFF counts the number of date part boundaries in this range of dates. date_trunc ( < date / time field > , < date part > ) A note on BigQuery: BigQuery’s DATE_TRUNC function supports the truncation of date types, whereas Snowflake, Redshift, and Databricks’. createddate, table2. datepart. In the elastic resize, the cluster will be unavailable briefly. To view a list of supported time zone names, run the following command. Write resolution instructions: Use bullets, numbers and additional headings Add Screenshots to explain the resolution Add diagrams to explain complicated technical details, keep the diagrams in lucidchart or in google slide (keep it shared with entire Snowflake), and add the link of the source material in the Internal comment section Go in. 该函数运行所依据的日期或时间值的特定部分（年、月或日、小时、分钟、秒、毫秒或微秒）。. date_from, evnt. The following query uses the ADD_MONTHS function inside a TRUNC function. Follow answered Sep 13, 2017 at 1:40. Step 2: Add the Amazon Redshift cluster public key to the host's authorized keys file; Step 3: Configure the host to accept all of the Amazon Redshift cluster's IP addresses; Step 4: Get the public key for the host; Step 5: Create a manifest file; Step 6: Upload the manifest file to an Amazon S3 bucket; Step 7: Run the COPY command to load the dataAthena supports complex data types and SerDe libraries for accessing various data formats, including Parquet, CSV, Avro, JSON and ORC. One of the toughest pitfalls of real-time data streaming is: how best to work with both real-time and historical data. Compares two dates or timestamps and returns the difference in days. sql. e. is_strict Redshift DATEDIFF Function. This function was run on 14 Jan which gives the result of 39. This is a guide to Redshift with. MONTHS_BETWEEN determines the number of months between two dates. Here its 0. Add a comment. with dates as ( select date, id from mytable ), grouped as ( select t. 0 if the difference is less than 1 and the difference as a floating point number otherwise, modify your query as follows: SELECT distinct u2. This is actually quite a complex problem because it involves: Hours within a day. asked Oct 30, 2018 at 20:06. Meridian indicator (for 12-hour clock) The default date format is YYYY-MM-DD. Redshift is a little more complex and ties up more IT management on maintenance due to lack of. The COPY command is able to read from multiple data files or multiple data streams simultaneously. You can create an Amazon Redshift table with a TEXT column, but it is converted to a VARCHAR (256) column that accepts variable-length values with a maximum of 256 characters. BigQuery also supports a separate DATE_DIFF function that will return the difference between two date types, unlike the DATETIME_DIFF that only supports the datetime type. Merging files by client id and id. Snowflake separates compute from storage, allowing for flexible pricing and configuration. This sql will give you the number of days between two dates as integer:. Redshift is limited only by the external data storage limitations. MONTHS_BETWEEN is a good solution to this problem. The third parameter is datepart. A Notebook area where you can add sections to enter and run SQL or add Markdown. To get the complete list of possible values, please refer to the Redshift Documentation. Specifically, DATEDIFF determines the number of datepart boundaries that are crossed between two expressions. The result is the same in all three cases. You can use these interval literals in conditions and calculations that involve datetime expressions. replace (tzinfo=None), cast (MyTable. Example to retrieve the number of day between 2 timestamps: DATEDIFF('day', timestamp1, timestamp2) DATEDIFF returns a BIGINT, so depending on the expected result you may cast it to string to concatenate it with the 'minute' part and so on, or do something else. Improve this answer. mydatetime) AS DateDifference FROM DateCte. The time between these two values is one second, but the result of applying the DATEDIFF function on these values is one year: DATEDIFF (YEAR , '2016-12-31 23:59:59' , '2017-01-01 00:00:00') = 11. The following example returns the date of the last day in the current month. The following SQL statement converts the date 02 Oct 2001 into a date data type. When you push the DATE_DIFF() function to Amazon Redshift using a Redshift ODBC connection, the Secure Agent incorrectly returns the difference values. To get the complete list of possible values, please refer to the Redshift Documentation. The following shows the syntax of the DATEPART() function:. Database code changes should be tracked in the same version control system as application code. To calculate the difference between the subfields of the date, Amazon Redshift has the function datediff. You can extract part of a timestamp by applying the EXTRACT. Summary: in this tutorial, you will learn how to use the SQL Server DATEPART() function to extract a part of a date. Specifically, DATEDIFF determines the number of datepart boundaries that are crossed between two expressions. The default timestamp without time zone (TIMESTAMP) format is YYYY-MM-DD HH:MI:SS. You can use the Redshift date format functions to convert the string literals, integer, date/time etc to required format. SELECT * FROM schemaName. For example, suppose that you're calculating the difference in years between two dates, 12-31-2008 and 01-01-2009. I need to calculate the total length in terms of Hours, Minutes, Seconds, and the average length, given some data with start time and end time. The second column gives the day of week (numerically, between 0 and 6). You cannot specify the date. Datediff with join returning not expected result. This is a guide to Redshift join. AWS Redshift clusters require some manual maintenance. In PostgreSQL, you can take the difference in years, multiply by 12 and add. tobymao closed this as completed in #1746 3 weeks ago. What is the use of DATEDIFF in redshift? Redshift date_trunc. PostgreSQL - Date Difference in Months. In the expression DATEDIFF (yy, 1, 2), both 1 and 2 are converted into dates as per the above. Transforming date with Redshift. datediff () counts the number of boundaries that are crossed between the two date expressions given as second and third argument, expressed in the unit given as first argument. I know that I can do another query to then get the max ID but I would ideally like to just go by timestamp. The right way to subtract between datetimes is: select datediff (seconds, table1. Just to clarify SQL server seems to require DATEDIFF (datepart, recentDate, olderDate) as startdate and enddate are a bit nebulous. DATEDIFF example The snippet can then be called in a query as shown below: select [difference_in_weekdays ('2017-06-20','2018-07-16')] Which returns 279. 1. The Redshift DATEDIFF function is used to calculate the difference between two date values based on the interval specified using. *, datediff (second, start_date, end_date) / 60. This is the documentation for the Amazon Redshift Developer Guide - amazon-redshift-developer-guide/r_DATEDIFF_function. Elastic resize is the fasted way to resize the cluster. For instance, one contrasting comparison is that Amazon Redshift Serverless doesn't have the concept of a cluster or node. The following example returns the number of tickets sold for each of the last 7 days of the month. timeworkedfrom >= DATEADD (MONTH, -6, DATEADD (month, DATEDIFF (month, 0, GETDATE ()), 0)) to this: AND be. 5, if diff is 8 hours - than 0. Yes. I tested this query on Redshift with the help of Workbench J. Check the Amazon Redshift Advisor recommendations. When an input value includes a time zone, Amazon Redshift uses the time zone to convert the value to UTC and stores the UTC value. To calculate the difference between the subfields of the date, Amazon Redshift has the function datediff. Improve this question. など. Value a is. Each cluster runs an Amazon Redshift engine and contains one or more databases. 2. The best way to approach this requirement would be to Create a Scalar Python UDF - Amazon Redshift that takes an input of two dates, then outputs the difference. These strings can contain datetime separators (such as ' - ', ' / ', or ': ') and the following "dateparts" and. id2; Calendar table: cal, table 1 (has start. Select now ()::time (0); This will output: 09:23:49. Modified 3 years, 7 months ago. The default timestamp with time zone (TIMESTAMPTZ) format is YYYY-MM-DD HH:MI:SSOF, where OF is the offset from UTC (for example, -8:00. Trunc function can truncate only time part. sql. For the first day of last month: select date_trunc('month', current_date) - interval '1 month' Or: select date_add(month, -1, date_trunc('month', current_date)) Amazon Redshift is a fast, scalable, secure, and fully managed cloud data warehouse that makes it simple and cost-effective to analyze all your data using standard SQL and your existing ETL (extract, transform, and load), business intelligence (BI), and reporting tools. The syntax of creating the temporary table by using this method is as shown below –. Pramit is a Technical Content Lead at Chaos Genius. startDate: A DATE or TIMESTAMP expression. AWS Collective See more. GitHub Gist: instantly share code, notes, and snippets. Syntax DATE_TRUNC ( 'datepart', timestamp) Arguments datepart The date part to which to truncate the timestamp value. Redshift is designed and optimized to store and access much larger data sets than RDS. 0 is for 1/1/1900, and getdate is the current date --(i used a set date bc dates will change as this post gets older). I need to find the difference between start_date_time and end_date_time, such that, if difference is 1 day, then result should be 1. The Redshift DATEDIFF function is used to calculate the difference between two date values based on the interval specified using either Years, Months, Days, Weeks, Hours, Minutes, Seconds, Milliseconds, et al. To view a list of. If you have 2 integers that represent years, and you want to know the difference between them, then just treat them like integers and use the - operator. Datetime types. Question: How can I take a start timestamp (created_at) and end timestamp (ended_at) and add a column that adds 1 month to the start timestamp until the end timestamp. The DATETIME_DIFF arguments are datetimes, not dates; Snowflake, Redshift, and Databricks’ DATEDIFF functions support multiple date types such as dates and timestamps. You should use Amazon Athena if you want to run interactive ad hoc SQL queries against data on Amazon S3, without having to manage any infrastructure or clusters. So, on a the date 30 April 2019, it would be 01 January - 30 April inclusive. Spark & PySpark SQL provides datediff() function to get the difference between two dates. 看起来Redshift支持两种可能的函数来计算两个DATE-like对象之间的时间间隔距离：DATEDIFF() &date_diff() 。下面的代码片断提供了这种行为的一个例子。 下面的代码片断提供了这种行为的一个例子。Amazon Redshift and PostgreSQL have a number of important differences that you must be aware of as you design and develop your data warehouse applications. Redshift's generate_series () function is a leader node only function and as such you cannot use it for downstream processing on the compute nodes. The following example finds the difference, in number of quarters, between a literal value in the past and today's date. #Datediff redshift how to; #Datediff redshift how to. This question is in a. Redshift Spectrum is a feature of the Amazon Redshift data warehouse. Aug 17, 2021 at 11:13. However, since the requirement is to generate monthly reports which I would assume to be a. With a simple where clause, we tried to filter out rows from the data set. I need to subtract 5 hours from sysdate in Redshift. SELECT table1. This often happens only for a few minutes. Month name (uppercase, mixed-case, lowercase, blank. It contains time with 6 digits after seconds. When the table grows larger, Amazon Redshift might change the distribution. If the result is positive, the Secure Agent returns negative values and if the result is negative, the positive value is returned. However when i run the same logic on actual data. Returns the count (signed integer) of the specified datepart boundaries crossed between the specified startdate and enddate. SELECT (EXTRACT(epoch from age('2017-6-15', now())) / 86400)::intThe popular one here is DATE_DIFF(): DATE_DIFF() – get the difference between two dates in any specificity (days, years). If the first date is later than the second date, the result is positive; otherwise, the result is negative. Por exemplo, suponha que você esteja calculando a diferença em anos entre duas datas, 12-31-2008 e 01-01-2009. e. dbeaver. Refer Redshift documentation for more details. 1) JSON function – This is the function which was we have using with JSON data. In the example the fixed_date is '2020-12-20' and I am using it my query. The following SQL statement converts the date 02 Oct 2001 into a date data type. Syntax DATEDIFF(endDate string, startDate string) → integer endDate: A DATE or TIMESTAMP expression. Add a policy that denies permission to redshift:GetClusterCredentials. For Amazon Redshift Serverless, some concepts and features are different than their corresponding feature for an Amazon Redshift provisioned data warehouse. numbers WITH RECURSIVE number_series (number) AS ( SELECT 1 UNION ALL SELECT number + 1 FROM number_series. This example assumes that the current date is June 5, 2008. Not the 1st one as it perform unnecessary (unless you really have such unprocessed data) truncate. this code works but seems like the results are off by 1 day. TIME: Only the time part. Let’s look at the syntax, examples, and use cases of Redshift DATEDIFF function: Specifically, DATEDIFF determines the number of date part boundaries that are crossed between two expressions. Join is very useful and important to join the tables in redshift. tstamp, TIMESTAMP (timezone=False))) Share. DATEADD ('week', 1, [due date]) Add 280 days to the date February 20, 2021. Amazon Redshift supports aggregation extensions to do the work of multiple GROUP BY operations in a single statement. – Spark & PySpark SQL provides datediff() function to get the difference between two dates. Anybody help what is the equivalent of Dateadd and Datediff in DBeaver or anybody can convert this code in DBeaver. To find the difference between two dates in the same column, we need two dates from the same column. Amazon Redshift is a popular cloud data warehouse, offering a fully managed cloud-based service that seamlessly integrates with an organization’s Amazon Simple Storage Service (Amazon S3) data lake, real-time streams, machine learning (ML) workflows, transactional workflows, and much more—all while providing up to 7. In SQL Server, you can use DATEDIFF function to get the datetime difference in specified units. if dlr. The following queries show an example of how to calculate the completion_days as the difference between eco_date and orginated_date. At this time, Amazon Redshift version 1. Other commands perform specific actions. I have an example of such in a recent answer: Cross join Redshift with sequence of dates. DATE: Dates without the time part. It calculates the difference in years between the birth date and the date in one year (minus one day) to account for partial years. datediff ("max", max. 1) Redshift Datepart Syntax. You can find explanations for each recommendation in the console, as described preceding. Datetime types. Performance. Consider SQL Server function to calculate the difference between 2 dates in months: SQL Server : -- Difference between Oct 02, 2011 and Jan 01, 2012 in months SELECT DATEDIFF ( month, '2011-10-02', '2012-01-01') ; -- Result: 3. Example. date1)) AS difference FROM t t1 INNER JOIN t t2 ON t1. amazon-redshift; or ask your own question. Then, the last_value function will take last value per row and the distinct removes all irrelevant rows from the output. At the time of insertion date into the timestamp datatype column, the value of date will be implicitly converted into the fully timestamp value. Pramit is a Technical Content Lead at Chaos Genius. Parameter description syntax of redshift JSON. Datediff is not relevant here . Consider the scenario where you start a transaction containing multiple statements on 10/01/08 23:59, and the statement containing CURRENT_DATE runs at 10/02/08 00:00. create table table_name (colm name 1 data type (size), colm name 2 data type (size), colm name N data type (size) specified constraint name (indexing) (specified colm name));Hi i need days difference but i'm getting negative values even if the start date is recent than end date startdate=2009-12-22 07:18:03. If diff is 12 hours, than result should be 0. timeworkedfrom >= date_trunc ('month', current_date) - interval '6. 0. SQL Date Diff Business Days. select to_date ( '20010631', 'YYYYMMDD', FALSE ); The result is July 1, 2001, because there are only 30 days. its a subtraction between 2 different tables that i need in business days. There are lots of Python libraries. The following example finds the difference in number. Argomenti. Improve this answer. Redshift is available based on a subscription payment model. Follow edited Oct 30, 2018 at 20:07. The spectrum allows for a seamless analysis since it is directly embedded into the Amazons framework. ID and Cust. datetime. start_date < '2016-01-01'::date is doing a proper comparison between two date fields. The spectrum allows for fast, complex, and efficient analysis of objects stored in the AWS cloud. CASE is used to specify a result when there are multiple conditions. 0. In the elastic resize, the cluster will be unavailable briefly. In this case, there is both a string type and a number type in the list. 以下示例查找过去日期和今天日期中的文本值之间的差异（以季度数为单位）。此示例假定当前日期为 2008 年 6 月 5 日。您可以可以用全名或缩写来命名日期部分。datediff 函数的默认列名称为 date_diff。However, you can query any catalog table or view openly if your query does not involve a join to an Amazon Redshift table. sql. Saved searches Use saved searches to filter your results more quicklyStrange SQLite does not have a DATEDIFF function.