date_or_time_part. But if you change over to DateTimeOffset, like this: TimeZoneInfo PST = TimeZoneInfo. I'd recommend familiarizing yourself with the three different kinds of timestamps. 655 months. Our cloud services layer, with the metadata repository, records the information regarding the files being stored, the. target_data_type must be one of the following:. In T-SQL, delete rows from table can be done by "delete table_name" but in Snowflake, you need to add the word "FROM" before table_name. I am working on Snowflake, need to substract 2 hours from specifc date: date time: 2021-06-10 14:07:04. AMA WITH MIKE TAVEIRNE Exciting news! Data Superhero, Mike Taveirne, is in forums from Sept 26-29 to answer your questions. There are 3 different timestamp types in Snowflake: TIMESTAMP_NTZ is the datatype for timestamps without a timezone (ntz = no time zone). In the following example, the TIMESTAMP_TYPE_MAPPING parameter is set to TIMESTAMP_LTZ (local time zone). milliseconds or nanoseconds) since the start of the Unix epoch (1970-01-01 00:00:00 UTC). This should be an integer. 2 days, but Snowflake will produce 1 because 2 is 1 more than 1. g. OBJECT. This content is a preview of a link. 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. , ChatGPT) is banned. In my view while taking difference between time (using DATEDIFF), both the time stamp values should be in same timezone. net. This is the date, time, or timestamp to which you want to add. This function is similar to CURRENT_TIMESTAMP, except that: It returns the current timestamp in the UTC time zone, whereas CURRENT_TIMESTAMP returns the timestamp in the local timezone. The first argument must be a built-in data type of either INTEGER. The function supports units of years, quarters, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, and nanoseconds. 000’) into However the same query with the same data set didn't get the exact result in snowflake; namely I got results with start_time of starting with something like `2019-05-09 07:00:05. Function does this is MySQL: UNIX_TIMESTAMP('1999-01-22') MySQL output 916988400. Solution. Viewed 8k times 6 I have a date column and a time. fron. How to get difference betwen these below two dates in snowflake. Nothing more than the Discord Snowflake (also called the Discord ID) is needed to check this. unsubscribe here or customize. 0. It does this for every unit, second, hour, day, month. Timestamp Datatypes in Snowflake. alter session set timestamp_output_format = 'YYYY-MM-DD HH24:MI:SS' UPDATE table SET TIMESTAMP=current_timestamp. The first value is subtracted from the second value. TIMESTAMPDIFF numeric-expression, string-expression. 000’ to ‘1702-02-06 00:25:26. A BIGINT. The setting of the TIMESTAMP_TYPE_MAPPING parameter does not affect the return value. Create a table that contains different types of data stored inside a VARIANT column, then use TYPEOF to determine the data types of each piece of data. To convert an epoch value to a UTC timestamp in Snowflake, you can use the TO_TIMESTAMP function. 1 Answer. 5. The timestamp column can be unloaded with the below COPY INTO statement to a Parquet file: copy into @~/parquet/new_parquet from ( select abc,timestamp ::string from t1 ) file_format= (type=parquet, compression=SNAPPY) ;1. In summary, this blog covers four parts: The definition of the Date type and the associated calendar. I did some research and found articles in the FAQ part of the community - For the 2-argument version: The source_timestamp argument is considered to include the time zone. To change the output of a TIMESTAMP value, you use the TO_CHAR() function by passing the name of TIMESTAMP value or column as the first argument, and the format string as the second argument. Its return value is TIMESTAMP_NTZ, whereas CURRENT_TIMESTAMP returns TIMESTAMP_LTZ. The default column name for the DATEDIFF function is DATE_DIFF. The AT or BEFORE clause is used for Snowflake Time Travel. with data as ( select current_timestamp () datetime ) select to_char (datetime, 'YYYYMMDD')::int from data. VARIANT. Timestamp 1: 11/23/2015 09:14:29 Timestamp 2: 11/5/2018 12:45:33 Expected Output: 1078 03:31:04. g. 13. Time Travel snowflake: The Ultimate Guide to Understand, Use & Get Started 101. I have a timezone-aware Python datetime object: start_date = datetime. java8 @dependabot Bump testcontainers-bom from 1. There are several ways to approach this, but here's the way I do it with SQL Generator function Datespine_Groups. Some time you expect the diff in "days" between 1. 13. Snowflake supports a single DATE data type for storing dates (with no time elements). g. SYSDATE¶. Timestamp difference in PySpark can be calculated by using 1) unix_timestamp () to get the Time in seconds and subtract with other time to get the seconds 2) Cast TimestampType column to LongType and subtract two long values to get the difference in seconds, divide it by 60 to. e. One expression may be a date and the other a datetime; a date value is treated as a datetime having the time part '00:00:00' where necessary. 2 days, but Snowflake will produce 1 because 2 is 1 more than 1. Snowflake has some bespoke features that make this a little easier though. In this example, the local time zone is US. Equivalent Redshift query. The TIMEZONE parameter is set to. Hot Network QuestionsBrowse to the Manage tab in your Azure Data Factory or Synapse workspace and select Linked Services, then click New: Azure Data Factory. There are 3 different timestamp types in Snowflake: TIMESTAMP_NTZ. 471395746-06" is not recognized snowflake. json_data:date_payment" into human readable format Ex. , appropriate winter tires are defined as those with either the M+S (mud and snow) or mountain/snowflake symbol, in good condition with a minimum tread depth. This returns a timestamp for each 15-minute interval between midnight and 12 PM on April 1. 33 @dependabot Bump jaxb-runtime from 4. SELECT ( (extract (epoch from ( '2012-01-01 18:25:00'::timestamp - '2012-01-01 18:25:02'::timestamp ) ) ) )::integer. Timestamp Datatypes in Snowflake. 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. For example, if the unit is MONTH and the slice_length is 2, then each slice is 2 months wide. In this blog post, we take a deep dive into the Date and Timestamp types to help you fully understand their behavior and how to avoid some common issues. Create and fill a table. Default is 1. Then you can right click on any. Provide details and share your research! But avoid. TIMESTAMPDIFF¶ Calculates the difference between two date, time, or timestamp expressions based on the specified date or time part. 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. TO_TIMESTAMP / TO_TIMESTAMP_* Time Zone. 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. さらに、受け入れられるすべての TIMESTAMP 値は、日付の有効な入力です. This is the date, time, or timestamp to which you want to add. Redirecting. For example, if you want to add 2 days to August 1, 2018, then this will be '2018-08-01'::DATE. The first timestamp_expression represents the later date; if the first timestamp_expression is earlier than the second timestamp_expression , the output is negative. delta) stream tracks all DML changes to the source object, including inserts, updates, and deletes (including table truncates). date_or_time_expr must evaluate to a date, time, or timestamp. TIMESTAMPDIFF('minute', '2021-05-19 15:30:00'::timestamp, '2021-05-19 17:00:00'::timestamp) + TIMESTAMPDIFF('minute', '2021-05-20 09:00:00'::timestamp,. This unit of measure must be one of the values listed in . "Day Date") similarly we can write the formulas using different intervals based on the date format in. 切り捨ては抽出とは異なります。例： タイムスタンプを四半期まで切り捨てると、入力タイムスタンプの四半期の最初の日の真夜中に対応するタイムスタンプが返されます。TIMESTAMP_NTZ. Histograms count the number of values that fall in a certain bin, so the first thing we'll do is create our bins. This issue can arise when working with TIMESTAMP_TZ and TIMESTAMP_LTZ field types, or when returning current_timestamp from the database, while the end-user's machine is set to a different time zone than that. If this post helps, then please consider Accept it as the solution to. The Snowpark library provides an intuitive API for querying and processing data in a data pipeline. Statement2: select count (*) from table1 before (timestamp =>to_timestamp_ltz ( '2018-09-24 11:30:00')) 2. In my view while taking difference between time (using DATEDIFF), both the time stamp values should be in same timezone. You are using different scales to represent to Snowflake what the number you are providing it, so that it can convert it into a timestamp. Alias for DATEDIFF. The unloader follows this pattern when writing values to Parquet files. TIMESTAMPDIFF. 18. TIMESTAMP_DIFF Description Returns the number of whole specified date_part intervals between two timestamps. Here is an example, where a table which has 2 columns abc (string) and timestamp (TIMESTAMP_TZ (9)). Then you can run a fairly simple query: select t. which yields an output of: float_serial_number. it would seem you. For a full explanation, see Convert a Field to a Date Field (Link opens in a new window). For example, if you want to add 2 days to August 1, 2018, then this will be '2018-08-01'::DATE. I know we can derive new column but we don't want that. They have the following use cases: Provide Alternative Clustering for tables with multiple access paths. If start is greater than end the result is negative. select timestampdiff (second, cast ('2019-01-10 07:02:11' as timestamp), cast ('2019-01-14 05:04:12' as timestamp))-(select cnt * 24 * 3600 from numberofhols) from dual; I then use the function, and put them in my query above. If you have a table for_stacko_timeline with a column ts, you can find the minimum and maximum timestamp. However then you need to convert this into the hour, minutes and seconds. It does not allow the user to add a second parameter for the expected format. 時間の単位。 サポートされている日付と時刻の部分 （例: month ）にリストされている値のいずれかでなければなりません。 値は文字列リテラルにすることも、引用符で囲まないようにすることもできます（例: 'month' または. This is the number of units of time that you want to add. You can cast to a varchar and give, as the second parameter, the format that you want: SELECT TO_VARCHAR ('2021-07-19 02:45:31. As long as the timestamps are in different days, Snowflake counts the difference in days as 1, even if it's only 2 seconds. Issue. 32 to 3. To convert an epoch value to a UTC timestamp in Snowflake, you can use the TO_TIMESTAMP function. Difference between two timestamp with all elements of dates-1. type. g. ; Keep the time unit singular. Returns the difference between two timestamps measured in unit s. 02. This allows me to find the number of. Extracts the corresponding time part from a time or timestamp value. It's INTERVAL 7 DAY, not INTERVAL 7 DAYS. e. ALTER SESSION SET TIME_ZONE = '+3:0'; and it will provide you the same result. How to get n days/months/year date from or before today's date in snowflake? Ask Question Asked 2 years, 5 months ago. Setup access to Snowflake Marketplace data. Converting Varchar Date into timestamp in Snowflake. 5 rows have no nulls. Oct 22, 2022. And output should be like . However, if you want to distinguish between months of different years, you need to use to_varchar () function: Refine your timestamps in Snowflake with the date_trunc function. Categories: Date/Time. When storing timestamps, Snowflake stores time zone data in the form of adding the offset at the end of the timestamp. If it has trouble, you can also give it a hint by providing input formatting preferences. You. String concatenation will build '1' + ',' + '27'. For example, if you want to add 2 days, this is 2. g. Choose an appropriate date or. then Snowflake will implicitly cast it back to a timestamp when it references the string in the context of a timestamp. VARIANT. These sets include more specific functions like CURRENT_DATETIME, DATE_SUB, EXTRACT, FORMAT_TIME, and so on. The default is month. Accepts relevant date and time parts (see next section for details). Add a comment. g. There are a total of 4 NULL values. 2 to 4. Like so: alter session set timezone = 'America/Los_Angeles'; SELECT. 何かと便利なので覚えといて損はないと思います。. If the data type is TIME, then the date_or_time_part must be in units of hours or smaller, not days or bigger. Snowflakeは、週に関連する特別な一連の日付関数（および同等のデータ部分）を提供し、その動作は DAYOFWEEKISO 、 WEEKISO 、 YEAROFWEEKISO の ISO 週のセマンティクスと一致しています。. From fetching the current timestamp to calculating date differences, we've got you covered. . SELECT. 9857574 AM. Plotting both lets us see the variation of temperature day-by-day, without obscuring longer-term patterns. If not specified, the default is to use the TIMESTAMP_OUTPUT_FORMAT parameter setting. In R, I am using our internal package snowflake to query the data where I do -. Modified 2 years, 5 months ago. Create a data engineering pipeline with Python stored procedures to incrementally process data. The funny thing is that if we add colon to the value i. We are using Talend ETL . This uses the row_number window function along with dateadd and generator to increment from a. @JasonT ,. Ask Mike anything about becoming a Data Superhero, building ML models, his journey as a global nomad, and more!There is no difference. Geospatial Data Types. BigQueryでは集計量. For DATEDIFF: date_or_time_expr1 and date_or_time_expr2 can be a date, time, or timestamp. 4. 01/02/20 2) and filter by the past 2 years. When data in a table is modified, deleted or the object containing data is dropped, Snowflake preserves the state of the data before the update. SYSDATE returns the system date, of the system on which the database resides. 123 segundos, não 1. TIMESTAMP_NTZ_OUTPUT_FORMAT. If you want to generate timestamps at intervals of 15 minutes, for example, you can use: SELECT GENERATE_TIMESTAMP_ARRAY ('2016-10-18', '2016-10-19',. Snowflake has EDITDISTANCE and SOUNDEX functions: select editdistance ('Duningham', 'Cunningham'); -- Result 2 select soundex ('McArthur') = soundex ('MacArthur'); -- Result TRUE. These functions are alternatives to using the DATE_PART (or EXTRACT) function with the equivalent date part (see. 8. これは、追加する時間単位を示します。例えば、2日を追加する場合、これは DAY になります。 この測定単位は、 サポートされている日付と時刻の部分 にリストされている値のいずれかでなければなりません。 valueIf you use SYSTIMESTAMP instead of SYSDATE as the default for all of your columns then you will avoid the implicit conversion to your session time zone for the WITH TIME ZONE value, and that will always show the database time zone. Create a set of data such that: 1 row has all nulls. 2 Answers. To Here is an example of changing a TIMEZONE at the session level: ALTER SESSION SET. This precision can lie in the range of 0 (seconds) to 9 (nanoseconds). It basically means that every time a row is changed, this value is increased. 1. Usage Notes¶. I'm trying to calculate an age value for our users based on their birthday, which one would expect to be a simple enough operation. Ask Question Asked 3 years ago. (timestamp) function. this SQL show string -> timestamp -> formatted string. working_day_start_timestamp else t. This is the date, time, or timestamp to which you want to add. call, passing the above start_date variable as the. For details, see Supported Date and Time Parts. These functions are alternatives to using the DATE_PART (or EXTRACT) function with the equivalent time part (see Supported Date and Time Parts). I'm guessing that Trino also looks at the difference in hours between the two timestamps to approximate the result down if it's less than 24 hours. These are some of the Date and Time functions you will be using quite often in Snowflake as a Data analyst or Data Engineer. As you may see, Z is inside single quotes, which means that it is not interpreted as the zone offset marker, but only as a character like T in the middle. TIMESTAMP_TRUNC. Represents values comprising values of fields year, month, day, hour, minute, and second. microsecond usa a hora, minuto, segundo e os primeiros seis dígitos dos segundos. Sunday's Snowflakes offers European and Canadian style for women. The default setting for this parameter is YYYY-MM-DD HH24:MI:SS. Thank youmillisecond usa a hora, minuto, segundo e os três primeiros dígitos dos segundos fracionários. Note that unit values can be different in SQL Server DATEDIFF and MariaDB TIMESTAMPDIFF. extract a certain part from a timestamp, in the example below. Usage Notes¶. . When comparing timestamps in our databases to CURRENT_TIMESTAMP Snowflake returns weird results. How can get a list of all the dates between two dates (current_date and another date 365 days out). After seeing @joshua. The time_slice function will always round down. The strftime () function also takes a format string as its first argument. change it to 2021-04-04T22:54:29+00:00 snowflake. java8 to 5. Summary Statistics. The following example shows how the contents of a stream change as DML statements execute on the source table: -- Create a table to store the names and fees paid by members of a gym CREATE OR REPLACE TABLE members ( id number(8) NOT NULL, name varchar(255) default NULL, fee number(3) NULL ); -- Create a stream to track changes to. 6 Answers. DATEDIFF in Snowflake, MySQL, and PostgreSQL. A timestamp is encoded information generally used in UNIX, which indicates the date and time at which a particular event has occurred. For example, if you want to add 2 days to August 1, 2018, then this will be '2018-08-01'::DATE. ,time_from_parts(0,0,timestampdiff(second, DATETIME_1::timestamp, DATETIME_2::timestamp)) as diff_hms from D You can compare these results to the ones I provided. Snowflakeは、時刻を HH:MI:SS の形式で保存するための単一の TIME データ型をサポートしています。. target_data_type must be one of the following:. For example, a value of 3 says to use 3 digits after the decimal point (i. I assume switching the order won't change the results. Round and format result as a string, e. tz, ntz, tz = ntz AS wrong, convert_timezone('UTC', tz) = ntz AS still_wrong. From Snowflake documentation: "When defining columns to contain dates or timestamps, we recommend choosing a date or timestamp data type rather than a character data type. If more than one row is evaluated (for example, if the input is the column name of a table that contains more than one row), each value is examined independently to. Snowflake stores data in files that are immutable, and encrypted, as part of our architecture. e. Window Functions. Usage Notes¶. SSS'Z'. Histograms count the number of values that fall in a certain bin, so the first thing we'll do is create our bins. Load *, Timestamp (Timestamp# (String)) as TS; LOAD * INLINE [. The Snowflake INTERVAL functions are commonly used to manipulate date and time variables or expressions. So you can do this by LEAD () SELECT ID, UserId, Serial, ModifiedDate, DATEDIFF (HH,ModifiedDate,LEAD (ModifiedDate) over (ORDER BY ID)) AS [Difference] FROM Times. Snowflake is a Cloud Data Warehousing and Analytics Platform that enables independent instant. DATE : calendar date (e. Expand Post. Snowpark Developer Guide for Python. Note: If there are specified two arguments with this function, it first adds the second argument to the first, and then returns a datetime value. October 10, 2023. If the value is not a CHAR or VARCHAR data type, it is implicitly cast to VARCHAR before evaluating the function. At first, you should check your application to determine why the JSON string was inserted into the column and remove them from the column if possible. Configure the service details, test the connection, and create the new linked service. Supported for streams on tables, directory tables, or views. TIMESTAMPDIFF function in Snowflake - Syntax and Examples. Snowflake does not have something like a ROWID either, so there is no way to identify duplicates for deletion. g. Note that setting a negative offset has the same effect as using the LEAD function. Querying, cloning, and restoring historical data in tables, schemas, and databases for up to 90 days through Snowflake Time Travel. 1. TIMESTAMP_DIFF TIMESTAMP_DIFF(timestamp_expression_a, timestamp_expression_b, date_part) Description. So while creating the parquet file, I declared timestamp data type as string in the parquet and then use effective_date::varchar::timestamp. SELECT to_timestamp(CURRENT_TIMESTAMP(), 'HH24:MI:SS. From the documentation: For example: For seconds, scale = 0. For more. The return value is always of type TIMESTAMP_TZ. datediff. Do not use the returned value for precise time ordering between concurrent queries. Function 4: Extract or Date Part. YEAR* / DAY* / WEEK* / MONTH / QUARTER¶. For a timestamp expression, the date from the timestamp. utc). BOOLEAN. g. I want to ask you for some help. You should take a look the TIMESTAMPDIFF function. midnight GMT is midnight GMT regardless of the timezone you are in. Datetime is a datatype. GEOGRAPHY. timestamp_expr. Also MySQL can have NULL values which can be '0000-00-00 00:00:00'Learn about the TIMESTAMP_NTZ type in Databricks Runtime and Databricks SQL. HOUR / MINUTE / SECOND¶. Users can restore deleted objects, make duplicates, make a Snowflake backup, and recover. Snowflake SQL: trying to calculate time difference between subsets of subsequent rows. e. Only works for string expressions. how to convert data type Timestamp_TZ (9) to Timestamp_NTZ (9) on existing table. Improve this answer. 1. Os segundos fracionários não são arredondados. 2. e. I seem to get the same result for the query as a stand-alone. The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap seconds (in ISO 8601: 1970-01-01T00:00:00Z). TIMEDIFF. Temporary policy: Generative AI (e. Step 1: Identfy our Quartiles. 0. Syntax to query with time travel is fairly the same as in SQL Server which is easy to understand and execute. 13. Creating a temporary table works in much the same way as a regular table. This is also referred to. 0. Snowflake creates column names in upper case regardless of how they are written *unless* the original create statement puts the columns names in double quotes (e. So for example the column name could be "File_Date" or "file_date". 引数¶ date_or_time_part. data loading performance with date and. This is the date, time, or timestamp to which you want to add. 0. The output format for timestamp_ltz values is set using the TIMESTAMP_LTZ_OUTPUT_FORMAT parameter. Because the timestamps are two seconds apart. Hive Date and Timestamp functions are used to manipulate Date and Time on HiveQL queries over Hive CLI, Beeline, and many more applications Hive supports. They can, for example, extract a portion of a date or time expression, add an interval to a date or time, and so on. not quite. The expression must be of type DATE or TIMESTAMP_NTZ. This is also referred to. 1. create temp table date_dummy_1 (days int) as select datediff ('day', '2020-01-01', current_date); The above statement will create a temp table called date_dummy_1 with the dat diff of 2020-01-01 to. rank) to each row based on their position in the specified window. In PostgreSQL, you can take the difference in years, multiply by 12 and add. Moving averages in Snowflake are an excellent way to discover patterns in your data. Result: '1. Where a time stamp is a numerical value representing the number of milliseconds from '1970-01-01 00:00:01' UTC (epoch) to the specified time. You could use the microsecond unit and divide by 1000 - MySQL doesn't appear to support milliseconds. extract a certain part from a timestamp, in the example below. Returns datetime_expr2 - datetime_expr1, where datetime_expr1 and datetime_expr2 are date or datetime expressions. Returns the whole number of specified date_part intervals between two timestamps (timestamp_expression_a - timestamp_expression_b). ; ExamplesIf you haven't started writing an app with snowflake, it reads like a lot of a smoke. mysql> SELECT TIMESTAMPDIFF (MINUTE,'2003-02-01','2003-05-01 12:05:55'); -> 128885. p. TIMESTAMP_LTZ. To get the difference in. Semi-structured Data Types. SQL Resources / BigQuery / TIME_DIFF TIME_DIFF See also DATE_DIFF, DATETIME_DIFF, or. ; Find rows created between one and two weeks ago:Based on our unique solution, Snowflake users are able to clone their tables, schema or databases without creating additional copies. Many applications use date functions to manipulate the date and time data types. 7. The Snowflake Date format includes four data types, and are used to store the date, time with timestamp details:. The first six date and time functions take an optional time value as an argument, followed by zero or more modifiers. 2020-01-01) DATETIME : calendar date and time (e. 1239') retorna 1. These functions are alternatives to using the DATE_PART (or EXTRACT) function with the equivalent time part (see Supported Date and Time Parts). BOOLEAN. Three quotes from the manual: 1. Snowflake support responded as follows: As per my investigation and internal research, the behaviour mentioned by you is a known one. In snowflake: CAST(Last_Modified_Date as timestamp)+cast(last_modified_Tm as timestamp) Iam getting issue with converting time to timestamp, can you help. 347694000 PM. Extracts the corresponding date part from a date or timestamp. [1] A known issue in Snowflake displays FLOAT, FLOAT4, FLOAT8, REAL, DOUBLE, and DOUBLE PRECISION as FLOAT even though they are stored as DOUBLE. 3. to_timestamp. Understand the syntax and limits with examples. Histograms. Hi @JustineMit - if an answer helps you, please upvote and/or accept it. Snowflake uses double-precision (64 bit) IEEE 754 floating-point numbers. Snowflake supports creating temporary tables for storing non-permanent, transitory data (e. We'll do this using the FLOOR function, which will round down a value to the nearest integer. To get the difference in seconds as we have done here, choose SECOND. Allows a time to be “rounded” to the start of an evenly-spaced interval. Workaround 1 ) alter user <username> set timezone='UTC'; select CURRENT_TIMESTAMP (); Workaround 2) alter session set timezone=‘UTC’; select CURRENT_TIMESTAMP ();Actually Simeon, it not a bad question, there are no such things as bad question. Sunday's Snowflakes, Victoria, British Columbia. 1 to 1. The number of rows backward from the current row from which to obtain a value.