Mutually exclusive execution using std::atomic? How to Connect to Databricks SQL Endpoint from Azure Data Factory? Below table represents the descriptions of the different datepart or timepart used in extract and date_part function. INTEGER. If the integer is less than 31536000000 (the number of milliseconds in a year), then the value is treated as Linear Algebra - Linear transformation question, Acidity of alcohols and basicity of amines, Styling contours by colour and by line thickness in QGIS. For example, while you are part of the way through a month, you may want to compare your progress with earlier months. AUTO, NOTE if you are using US formatting then use YY-DD-MM (the month in the end), Also, if you want to safely check that the DOB is not in future then add IFF as follows. Date format specifier for string_expr or AUTO, which specifies for The extract function is very useful when you are working with various data sources. For example, extract time part of the current datetime and append it to file name to create unique file name. How to Export SQL Server Table to S3 using Spark? How to construct date from (year, weekOfYear, dayOfWeek) in Snowflake? Can archive.org's Wayback Machine ignore some query terms? Firstly, Lets take sample data to test the DATE_TRUNC function. When the date or time part is a week or any other variations, the output is controlled by the WEEK_START session parameter. We and our partners use cookies to Store and/or access information on a device. There's no way to have automagically the "right" year display before, if some of your users are going to be very young and others very old, how could you know for sure if the person was born in 20th or 21st century? Snowflake to interpret the format. View all posts by john.dacosta. As with anything there are trade-offs, feel free to rewrite as you wish for simplicity vs consistency in keystrokes. Are you looking to find how to use the DATE_TRUNC() function within the Snowflake cloud data warehouse or maybe you are looking for a solution, how to use the DATE_TRUNC function in the Snowflake? Some of our partners may process your data as a part of their legitimate business interest without asking for consent. This website uses cookies to ensure you get the best experience on our website. Connect and share knowledge within a single location that is structured and easy to search. treated as nanoseconds. a number of seconds. toLocaleString ("en", {month: "long"}); $$; The consent submitted will only be used for data processing originating from this website. As a Data Analyst / Developer there are often times when you need a quick way to calculate specific dates. The data type of the returned value is DATE. Snowflake Date & Time Functions Cheat Sheet. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, Snowflake sql query to assign weeks to a month, How to return only the Date from a SQL Server DateTime datatype. Alternatives: EXTRACT , HOUR / MINUTE / SECOND , YEAR* / DAY* / WEEK* / MONTH / QUARTER Syntax DATE_PART( <date_or_time_part> , <date_or_time_expr> ) Returns The data type of the return value is NUMBER. The VARIANT must contain one of the following: A string containing an integer number of seconds or milliseconds. I meant it is more complicated than just using dateadd function. The idea here is to replace all the alphabetical characters except numbers and date delimiter. An expression that evaluates to a string containing an integer, for example 15000000. Like for example If I pick a date_id to say 2020-01-15, that date_id should return dates from 2019-01-15 till 2020-01-15. Extract epoch from the current_timestamp in Snowflake. Syntax EXTRACT(part FROM expression) Where expression is a DATE, part values can be: DAYOFWEEK Returns a number 1-7 with Sunday being the first day of the week. For more information, Where does this (supposedly) Gibson quote come from? EXTRACT Extracts the specified date or time part from a date, time, or timestamp. DAY DAYOFYEAR WEEK The function returns the result of subtracting the second argument from the third argument. I am new to snowflake and my manager wants me to retrieve the data of the past month when it is 5th of the current month. Snowflake Synapse More Commonly used Snowflake Date Functions and Examples Vithal S November 18, 2022 Snowflake 11 mins read The date functions are most commonly used functions in the data warehouse. with timestamp1 as (select to_timestamp ('2019-09-10 00:06:04') as ts union; select to_timestamp ('2019-09-30 00:06:04') as ts ) select LAST_DAY (ts, 'MONTH') from timestamp1; The above query results in date as . There are certain use case scenarios when it is recommended to use the DATE_TRUNC function within the Snowflake cloud data warehouse which are as follows: DATE_TRUNC() Snowflake Official Documentation Linkif(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'azurelib_com-large-mobile-banner-1','ezslot_7',667,'0','0'])};__ez_fad_position('div-gpt-ad-azurelib_com-large-mobile-banner-1-0'); In this article, we have learned about DATE_TRUNC() function and uses with the examples explained clearly. If the variant contains a JSON null value, the output is NULL. FROM transaction. --Example of the Function HOUR (DATEPART in SQL SERVER/ SQL Database) SELECT CURRENT_TIMESTAMP () AS T, HOUR (T); Results : Function DAYNAME () Thefunction DAYNAME accepts a date or timestamp as a parameter. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. upon the magnitude of the string, it can be interpreted as seconds, milliseconds, microseconds, or seconds, rather than as milliseconds, microseconds, or nanoseconds. "1st", "2nd"), WEEK_DAY_DESC (not just "Wed" but "Wednesday", "Thursday), some keys like MONTH_KEY, and, most importantly, a holiday . microseconds, or nanoseconds after the start of the Unix epoch (1970-01-01 00:00:00.000000000 UTC). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. In my other article, we have seen how to extract number or numeric values from a string. The following demonstrates the use of the functions WEEK, WEEKISO, WEEKOFYEAR, YEAROFWEEK, and YEAROFWEEKISO. How do I align things in the following tabular environment? The use of quoted integers as inputs is deprecated. I hope the information that was provided is helped in gaining the knowledge. How to Optimize Query Performance on Redshift? How to Export SQL Server Table to S3 using Spark? For a timestamp expression, the date from the timestamp. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. You also have some fiscal year columns that we don't. On the other hand, we have some additional columns like DAY_SUFFIX (e.g. What Is the Difference Between 'Man' And 'Son of Man' in Num 23:19? What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, How to return only the Date from a SQL Server DateTime datatype, Snowflake SQL convert date 'YYYY-MM-DD' to 'DD-MM-YYYY', Snowflake Extracting Month, year from date, Converting Varchar to Timestamp in Snowflake, Date conversion query in SQL using STR_TO_DATE. microseconds, or nanoseconds. two rows), the first processed value determines whether all subsequent values are treated as seconds, milliseconds, convert 03-25-2019 to March-2019, or Mar-2019, or 03-2019, the format isn't really important to me.) INTEGER. Note: Changing the format of the cell only changes the view rather than the data content. Examples vegan) just to try it, does this inconvenience the caterers and staff? seconds. Seconds from the time or timestamp field. Find centralized, trusted content and collaborate around the technologies you use most. seconds, rather than as milliseconds, microseconds, or nanoseconds. ORDER BY EXTRACT (MONTH FROM TO_DATE (month, 'MM YYYY')); But I got an ORA-01866: the datetime class is invalid. or milliseconds: Contrast the output of the following two queries. Snowflake Extract Date using Regular Expression Functions, Commonly used Snowflake Date Functions and Examples, Snowflake Translate Function, Usage and Examples. There are certain use case scenarios when it is recommended to use the DATEDIFF function within the Snowflake cloud data warehouse which are as follows: If we want to find the difference between two dates in the form of days, years, or months. If you want reset the timestamp attributes and remains constant for few then we can make use of this function. What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? Get week of the year from the current_timestamp in Snowflake. (To convert the SAS date value to a calendar date, use any valid SAS date format, such as the DATE9. Why are physically impossible and logically impossible concepts considered separate in terms of probability? String from which to extract a date, for example '2019-01 . one row), each value is examined independently to determine if the value represents seconds, milliseconds, microseconds, or The extract function is equivalent to date_part () function. The value of truncated to month has only same year and month but the date got set to starting (1) and same for truncated to date i.e. Snowflake supports DATE and TIMESTAMP data types: 1. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. For example, consider below snowflake example to replace all characters except date value. I am attempting to convert a date (formatted as yyyy-mm-dd) to a year-month format (ex: 2021-07) while keeping the date datatype. --------------+-------------+-------------------------+----------------+, | DESCRIPTION | VALUE | TO_TIMESTAMP(VALUE) | TO_DATE(VALUE) |, |--------------+-------------+-------------------------+----------------|, | Seconds | 31535999999 | 2969-05-02 23:59:59.000 | 2969-05-02 |, | Milliseconds | 31536000000 | 2969-05-03 00:00:00.000 | 2969-05-03 |, | Milliseconds | 31536000000 | 1971-01-01 00:00:00.000 | 1971-01-01 |, | Seconds | 31535999999 | 1970-12-31 23:59:59.999 | 1970-12-31 |. The VARIANT must contain a DATE, or a string that contains an If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. You have to deal with the WEEK_START and WEEK_OF_YEAR_POLICY parameters. which specifies that Snowflake should automatically detect the format to use. This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. nanoseconds. Syntax EXTRACT( <date_or_time_part> FROM <date_or_time_expr> ) Usage Notes date_or_time_part must be one of the values listed in Supported Date and Time Parts. for example: the date is like - April 20th will be stored in the database as "2021-4-01" - and same for April 25th date will be stored as "2021-4-01" . Learn how your comment data is processed. Month uses the month and year from the date. EXTRACT Definition The EXTRACT function in BigQuery will return a specific part of a DATE, DATETIME or TIMESTAMP. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. If the integer is less than 31536000000 (the number of milliseconds in a year), then the value is treated as Same as YEAROFWEEK, except uses ISO semantics. Minutes from the time or timestamp field. For additional usage notes, see Returns for DATE_PART. If the format of the input parameter is a string that contains an integer: After the string is converted to an integer, the integer is treated as a number of seconds, milliseconds, Currently, negative values are always treated as seconds. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. There are multiple ways to get some of these values, and some of these, were simply copy pasted with the increments changed to zero. If you are looking for any of these problem solutions then you have landed on the correct page. How do you ensure that a red herring doesn't violate Chekhov's gun? format.) How to get week number of month for any given date on snowflake SQL, How Intuit democratizes AI development across teams through reusability. treated as microseconds. How do I get the current date and time in PHP? This website uses cookies to ensure you get the best experience on our website. Does a summoned creature play immediately after being summoned by a ready action? Do new devs get fired if they can't solve a certain bug? So dont waste time lets start step by step guide to understanding what is the DATE_TRUNC() expression. session parameter (usually AUTO). for 2 Jan 2022, the output should be 2. Run a scheduled job on the 5th of every month. I need to count cells of various months, but the cells autopopulate from the database with date and time. Lets consider there are 50 people in a queue but, we can able to manage only first 20 people for the day and the rest will not be able to apply for the post. How to tell which packages are held back due to phased updates. If you are familiar with the regular expression, then you can use different pattern based on your required date format. DATE: The DATE type stores dates (without time). DATE_TRUNC () function helps to truncate the given input data i.e. Thanks @emilie I took a look at the date dimension code that you referenced. . For details, see the Usage Notes below. You can substract two dates in the Snowflake using the DATEDIFF function. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. Get the date and time right now (where Snowflake is running): select current_timestamp; select getdate(); select systimestamp (); select localtimestamp; How do I align things in the following tabular environment? Possible values are year, quarter, month, or week (or any of their supported variations). An expression of type VARIANT. Minute uses the hour and minutes from the time/timestamp. Accepts dates in the most common forms such as YYYY-MM-DD or DD-MON-YYYY etc. Snowflake supports various date functions to validate a date value. microseconds, or nanoseconds after the start of the Unix epoch (1970-01-01 00:00:00.000000000 UTC). Explained: ILIKE() function in Snowflake ? Please share your comments and suggestions in the comment section below and I will try to answer all your queries as time permits.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'azurelib_com-leader-2','ezslot_9',659,'0','0'])};__ez_fad_position('div-gpt-ad-azurelib_com-leader-2-0'); Explained: DATEADD() function in Snowflake ? For example, We want to get the difference between Jan 10th 2021 and Jan 25th 2021, then the resultant output is 15 ( DATEDIFF(day,2021-01-10,2021-01-15) ). I couldn't find the FORMAT function in SNOWFLAKE so I attempted with DATE, DATE_PART, but they all seem to make my column a varchar, losing its date type. Can I tell police to wait and call a lawyer when served with a search warrant? date, time, or timestamp. TO_DATE() does this, like TO_DATE(date_column, 'yyyy-MM') See https://docs.snowflake.com/en/sql-reference/functions/to_date.html. Thanks for contributing an answer to Stack Overflow! I am new to snowflake and my manager wants me to retrieve the data of the past month when it is 5th of the current month. Being inspired by a post I was forwarded, I took the opportunity to convert these functions for usage in the snowflake cloud data platform. The default is the current value of the . Similar logic applies for microseconds and nanoseconds. This behavior might change in the future. To review, open the file in an editor that reveals hidden Unicode characters. You can use date functions to manipulate the date expressions or variables containing date and time value. Get minutes from the current_timestamp in Snowflake. I guess the alternative is to hardcode using Sunday dates but the code is far too long and has too many conditions. How can this new ban on drag possibly be considered constitutional? Get day of the week from the current_timestamp in Snowflake. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Use pandas DatetimeIndex() to Extract Month and Year. Snowflake recommends that you call TO_DATE For example, -31536000000000000000 is treated as a number of seconds before the year 1970, although its scale implies that it's intended to be used as nanoseconds. To get the number of years between the two dates we can use the datediff as follows: To get the number of months between the two dates we can use the datediff as follows: To get the number of days between the two dates we can use the datediff as follows: To get the number of hours between the two dates we can use the datediff as follows: To get the number of minutes between the two timestamps we can use the datediff as follows: To get the number of seconds between the two timestamps we can use the datediff as follows:if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'azurelib_com-large-mobile-banner-1','ezslot_6',667,'0','0'])};__ez_fad_position('div-gpt-ad-azurelib_com-large-mobile-banner-1-0'); There are certain use case scenarios when it is recommended to use the DATEDIFF function within the Snowflake cloud data warehouse which are as follows: DATEDIFF Snowflake Official DocumentationLinkif(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'azurelib_com-leader-3','ezslot_9',659,'0','0'])};__ez_fad_position('div-gpt-ad-azurelib_com-leader-3-0'); In this article, we have learned about the DATEDIFF() function and its uses with the examples explained clearly. For example, convert extracted date field to YYYY-MM-DD format. For example, if we want to calculate the days present between January 10th and March 5th, then we can make use of this function. Month-to-Date (MTD) and Year-to-Date (YTD) analyses are useful when conducting timeframe-based comparisons. For 12 Feb 2022, the output should be 2. How do I align things in the following tabular environment? For example, consider below example to get date value. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. rev2023.3.3.43278. mm/dd/yy format: style code 1 mm/dd/yyyy format: style code 101 DECLARE @Inputdate datetime = '2019-12-31 14:43:35.863'; Select CONVERT (varchar,@Inputdate,1) as [mm/dd/yy], CONVERT (varchar,@Inputdate,101) as [mm/dd/yyyy] For details, see Supported Date and Time Parts. DateTrunc gives you first date of Month like 1/1/2018. In this article, we will check how to extract date from a string field using Snowflake regular expression functions. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Hello @Kannan, welcome to SO. Why do many companies reject expired SSL certificates as bugs in bug bounties? Date format specifier for string_expr or The VARIANT must contain a DATE, or a string that contains an Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Redshift RSQL Control Statements IF-ELSE-GOTO-LABEL. extract number or numeric values from a string, Snowflake Extract Numbers using Regular Expression Functions, Snowflake Regular Expression Functions and Examples. If the variant contains a date, the date value is preserved as is. Snowflake recommends that you call TO_DATE, If the month starts on a Saturday, it should be labelled 0. For example: if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'azurelib_com-large-leaderboard-2','ezslot_3',636,'0','0'])};__ez_fad_position('div-gpt-ad-azurelib_com-large-leaderboard-2-0');Above example will find out the difference between the two date. if some remaining values are less than 31536000000. having the same value as input. I would like to convert a date field to month-year (e.g. Use Excel's DATE function when you need to take three separate values and combine them to form a date. SQL to Determine if Current Week is Week Containing N Friday of Month, assigning week number (1 - 5) to days of the month, how to get date of 1st week of current month, VBA for week number of a month similar to desktop calendar. I tried extracting the month in the ORDER BY subclause. from 1st March 2021 to 31st March 2021 and similar for all the other months. date, time, or timestamp. This function supports years, quarters, months, weeks, days, hours, minutes and seconds. If the month starts on a Saturday, it should be labelled 0. SELECT DATEADD(year, 2, current_date()); Add two days to the current date: SELECT DATEADD(day,2,current_date()); Add two hours to the current date and time: SELECT DATEADD(hour,2,current_timestamp()); Add two minutes to the current date and time: SELECT DATEADD(minute,2,current_timestamp()); Add two seconds to the current date and time: As a Data Analyst / Developer there are often times when you need a quick way to calculate specific dates. ORDER BY TO_DATE (month, 'MM YYYY'); The query returns twelve months, but they're all jumbled up. Now I'll parse the json, extract the values, putting that here so you can make sure we're having the same data structure. PS: The data for every month has same date. Manage Settings in /nfs/c05/h04/mnt/113983/domains/toragrafix.com/html/wp-content . I tried converting some MS SQL & TSQL codes from other Stack Overflow questions but it did not work on Snowflake. I'm Vithal, a techie by profession, passionate blogger, frequent traveler, Beer lover and many more.. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, Converting date timestamp into date in snowflake, Snowflake Extracting Month, year from date, Date Conversion To Year-Month In Snowflake, Snowflake changing varchar field to date - getting error 'Can't parse '1/7/2022' as date with format 'MM/DD/YYY', Partition by date in Snowflake procedure removing leading zeros from date. DATEDIFF() function helps to get the difference between dates, timestamps, or time. Netezza Extract Function Syntax extract (units FROM col) Netezza Extract Function Usage For more information, see Date and Time Formats in Conversion Functions. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. number of seconds before the year 1970, although its scale implies that its intended to be used as nanoseconds. We will use those functions to get a date values from a string. I will also show you what and how to use DATE_TRUNC() function. treated as nanoseconds. DATEDIFF() function is used to subtract two dates, times, or timestamps based on the date or time part requested. as milliseconds. By clicking Accept, you are agreeing to our cookie policy. as to the prior month window that can be done via DATE_TRUNC and DATEADD, the other half of the question only do it on the 5th, if you have a task run daily etc. How is an ETF fee calculated in a trade that ends in less than a year? TO_TIME, or TO_TIMESTAMP with strings that contain integers only when those integers are intended to be Many . How to Connect to Databricks SQL Endpoint from Azure Data Factory? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Extract month from the current_timestamp in Snowflake. The INTNX function returns the SAS date value for the beginning date, time, or datetime value of the interval that you specify in the start-from argument. Set SQL date boundaries for a rolling month cycle using today and the day of billing, Identify those arcade games from a 1983 Brazilian music video. Similarly, there are so many applications use extract or date_part function. Follow Up: struct sockaddr storage initialization by network format-string. If the value is greater than or equal to 31536000000 and less than 31536000000000, then the value is treated The difference between the phonemes /p/ and /b/ in Japanese. Extracts the specified date or time part from a date, time, or timestamp. OK then see my query after modification, I added WEEK OF MONTH calculation. You can convert the date filed to required format using built-in conversion functions. Teradata EXTRACT You can extract YEAR, MONTH, DAY, HOUR, MINUTE, TIMEZONE_HOUR, TIMEZONE_MINUTE, SECOND from the input date/time. The reason why he wants to update the last month data on 5th of every next month because that is the day when we get the data. The extract function is equivalent to date_part() function. However, it would not be useful to compare part of the current month with the entirety of earlier months. from 1st March 2021 to 31st March 2021 and similar for all the other months. Note that this method takes a date as an argument. I need to dob value as 2020-10-02. The REGEXP_REPLACE function is one of the easiest functions get required value. The only difference between the two is the order of the rows: If the format of the input parameter is a string that contains an integer: After the string is converted to an integer, the integer is treated as a number of seconds, milliseconds, Hi Michael, thanks for this. Redshift RSQL Control Statements IF-ELSE-GOTO-LABEL. The Snowflake function HOUR () accepts a time or a timestamp parameter and returns the hours as an integer. Deprecation Warning: Future versions of Snowflake might automatically interpret stringified integer values as Warning: "continue" targeting switch is equivalent to "break".Did you mean to use "continue 2"? Connect and share knowledge within a single location that is structured and easy to search. Is it possible to create a concave light? For all other values, a conversion error is generated. I know that I can extract the year and the month from a date by using Datetimeyear() and Datetimemonth() respectively but what if I want to ex. To extract the month from a particular date, you use the EXTRACT () function. 2. For example, -31536000000000000000 is treated as a Short story taking place on a toroidal planet or moon involving flying, Identify those arcade games from a 1983 Brazilian music video, Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). rev2023.3.3.43278. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. Alternatives: TRUNC DATE_PART , EXTRACT Syntax DATE_TRUNC( <date_or_time_part>, <date_or_time_expr> ) Returns The returned value is the same type as the input value. Thanks. Now u are using DATEADD and adding one month, so it is returning 2/1/2018. So, dont waste time lets start a step-by-step guide to understanding what is the DATEDIFF() expression. Styling contours by colour and by line thickness in QGIS, How to tell which packages are held back due to phased updates, Recovering from a blunder I made while emailing a professor, Is there a solution to add special characters from software and how to do it. How to notate a grace note at the start of a bar with lilypond? Data Analytics & Technology by John DaCosta. Extracting the quarter date part from a timestamp returns the quarter number of the year in the timestamp. I'm trying to extract the week number of the month for any given date. as milliseconds. When date_part is week (or any of its variations), the output is controlled by the WEEK_START session parameter. The default is the current value of the DATE_INPUT_FORMAT Extract Date using Snowflake REGEXP_REPLACE Function. session parameter (usually AUTO). Continue with Recommended Cookies. SELECT SUM(number) AS total, DATE_TRUNC (date, MONTH) AS month FROM ( SELECT CAST('2021-02-04' AS DATE) AS date, 3 AS number UNION ALL ( SELECT CAST('2021-02-14' AS DATE) AS date, 7 AS number) UNION ALL ( SELECT CAST('2021-01-04' AS DATE) AS date, 27 AS number) ) AS table_3 GROUP BY month total 10 27 month 2021-02-01 2021-01-01 The following shows the syntax: EXTRACT (MONTH FROM date) Code language: SQL (Structured Query Language) (sql) In this syntax, you pass the date from which you want to extract the month to the EXTRACT () function. Can I tell police to wait and call a lawyer when served with a search warrant? Bulk update symbol size units from mm to map units in rule-based symbology. or TO_TIMESTAMP with strings that contain integers only when those integers are intended to be interpreted as