The Snowpark library provides an intuitive API for querying and processing data in a data pipeline. 関数は、年、四半期、月、週、日、時間、分. I can resolve this by changing the account parameter TIMESTAMP_TYPE_MAPPING to LTZ. Is there a way to change our Snowflake Account to point to different Timezone (preferably ) UTC ? select CURRENT_TIMESTAMP(), convert_timezone( 'US/Eastern',CURRENT_TIMESTAMP()) We would like to get UTC datetime for. ISO Weeks¶. DATEDIFF の場合: date_or_time_part. October 10, 2023. Casting invalid string date to date in Snowflake. with data as ( select current_timestamp () datetime ) select to_char (datetime, 'YYYYMMDD')::int from data. SELECT to_timestamp(CURRENT_TIMESTAMP(), 'HH24:MI:SS. Redirecting. TRUNC. There are 3 different timestamp types in Snowflake: TIMESTAMP_NTZ. If not specified, the default is to use the TIMESTAMP_OUTPUT_FORMAT parameter setting. GEOMETRY. As per your comment, your SQL Server version is 2012. select datediff (qtr, '1998-07-01', current_date); date_diff ----------- 40 (1 row) The following example joins the SALES and LISTING tables to calculate how many days after they were listed any tickets were sold for listings 1000 through 1005. next timestamp = var _ID='Table' [ID]+1 return CALCULATE (MAX ('Table' [timestamp]),FILTER ('Table','Table' [ID]=_ID)) I have attached my pbix file ,you can refer to it . Categories: Date/Time. Viewed 3k times 2 I have a requirement wherein I want to get the date 'n' number of days/ months/ year from or before today to basically filter the results of the query in snowflake. . There are 3 different timestamp types in Snowflake: TIMESTAMP_NTZ. The default date format of Hive is yyyy-MM-dd, and for Timestamp yyyy-MM-dd HH:mm:ss. Snowflakeは、整数を秒として解釈することが意図されている場合にのみ、整数を含む文字列で TO_DATE、 TO_TIME または TO_TIMESTAMP を呼び出すことをお勧めします。. TIMESTAMPDIFF ( numeric-expression string-expression. Screenshot 2: a ticket has been created definitely before the current local timestamp, however when using a case when statement (greater condition) to compare both timestamp Snowflake returns the current_timestamp as the greater one;. 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. The schema is SYSIBM. You can use a DATE. id , sum (datediff (‘second’, -- calculate the max of the two start time (case when t. So while creating the parquet file, I declared timestamp data type as string in the parquet and then use effective_date::varchar::timestamp. Function 4: Extract or Date Part. Extracting the quarter date part from a timestamp returns the. *, min (date) over (partition by cardid) as min_date from t ) t where legit = 0 and date < min_date + interval '10 day. 0. g. If this value is then converted to TIMESTAMP_NTZ in Snowflake, the user sees 18:00:00, which is different from the original value, 12:00:00. Statement2: select count (*) from table1 before (timestamp =>to_timestamp_ltz ( '2018-09-24 11:30:00')) 2. GEOMETRY. If the input data type is DATE, and the date_or_time_part is hours or. 2020-01-01 13:04:11-5:00) TIME : a time as seen on a watch (e. Supported for streams on tables, directory tables, or views. This document details the similarities and differences in SQL syntax between Snowflake and BigQuery to help accelerate the planning and execution of moving your EDW (Enterprise Data Warehouse) to BigQuery. Histograms count the number of values that fall in a certain bin, so the first thing we'll do is create our bins. If you need the difference in seconds (i. If you use current_timestamp, MySQL will use timezone which is configured in my. Although DATEDIFF is specific to SQL Server, similar functions are available in other database systems:. SQL. TIME は、 TIME（3）などの小数秒のオプションの精度パラメーターをサポートします。時間精度の範囲は、0（秒）から9（ナノ秒）までです。Usage Notes¶. Hi @JustineMit - if an answer helps you, please upvote and/or accept it. Paramter used to configure different file format while loading csv data into snowflake. Common conventions: Unless otherwise specified, all operators return NULL when one of the operands is NULL. SELECT. The function allows you to calculate time differences in units other than seconds, such as years, months, or. Note that setting a negative offset has the same effect as using the LEAD function. In Snowflake, you will need to run the TIMEDIFF /TIMESTAMPDIFF command with date part of "SECOND" so you do not lose any precision. 471395746-06" is not recognized snowflake. Then you can run a fairly simple query: select t. Converting Varchar Date into timestamp in Snowflake. extract a certain part from a timestamp, in the example below. Where unit represents the unit of time, like YEAR, QUARTER, MONTH, WEEK, DAY, HOUR, MINUTE, or SECOND. For example: Truncating a timestamp down to the quarter returns the timestamp corresponding to midnight of the first day of the quarter for the input timestamp. An operator manipulates any number of data inputs, also called operands, and returns a result. To use the Timestampdiff function to get accurate results, you need to calculate the difference in days using a smaller time parameter, e. 1 What is the Syntax of To_DATE Function in Snowflake?i am looking to change in snowflake the values of a date field which has for example this format: 2/10/17, 11/1/17, 12/18/19 to this format: 20010408, 20121226, 20010304. 000’) into datetime64[ns] values. thanks. ; 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. This information could be accurate to the microseconds. DATEDIFF. A number of seconds (if scale = 0 or is absent) or fractions of a second (e. Search for Snowflake and select the Snowflake connector. 0. Only works for string expressions. The TIMESTAMPDIFF function returns an estimated number of intervals of the type defined by the first argument, based on the difference between two timestamps. If the value is a non-integer numeric value (for example, FLOAT) the value will be rounded to the nearest integer. This precision can lie in the range of 0 (seconds) to 9 (nanoseconds). Viewed 8k times 6 I have a date column and a time. Snowflake has some bespoke features that make this a little easier though. What is Timestamp in Python. EXTRACT. I am trying to get the same output in Snowflake, but cant figure out how to return a float. So try converting one of them to other timezone using "CONVERT_TIMEZONE" and thn apply the DATEDIFF function. This is generally what we use though: CONVERT_TIMEZONE ('UTC', current_timestamp ())::timestamp_ntz. Follow edited Apr 11 at 23:57. Assuming that *ALL* of your timestamp fields in the source data file have this format, you could set the TIMESTAMP_FORMAT parameter for the COPY INTO to 'YYYY-MM-DD HH24:MI:SS UTC' and the conversion will be done automatically for you during the load. the warehouse metering history is providing information on how many credits a warehouse consumed in an hour. The Snowflake INTERVAL functions are commonly used to manipulate date and time variables or expressions. g. It also covers the calendar switch in Spark 3. For example, if you want to add 2 days to August 1, 2018, then this will be '2018-08-01'::DATE. This is the date, time, or timestamp to which you want to add. In this case, we can make use of TIMESTAMP_DIFF and CURRENT_TIMESTAMP: SELECT date, TIMESTAMP_DIFF (CURRENT_TIMESTAMP(), date, SECOND) AS seconds_since FROM ( SELECT TIMESTAMP_SUB (CURRENT_TIMESTAMP(), INTERVAL 30 SECOND) AS. Add a comment. Only works for string expressions. Snowflake SQL: trying to calculate time difference between subsets of subsequent rows. BigQueryの集計で必ず使う日時関連の関数をまとめてみました。. For example, the value in the column is 20221018121036. 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. For example, if you want to add 2 days, then the value is 2. Usage Notes¶. 2022-02-07 12:57:45. PRO TIP: Snowflake does have an additional layer of data protection called fail-safe, which is only accessible by Snowflake to restore customer data past the time travel window. 8. numbering all the duplicates with the ROW_NUMBER () function, and then delete all records with "is_duplicate" > 1 and finally delete the utility column. If the data type is TIME, then the date_or_time_part must be in units of hours or smaller, not days or bigger. CONVERT. There are 3 different timestamp types in Snowflake: TIMESTAMP_NTZ is the datatype for timestamps without a timezone (ntz = no time zone). You could use the microsecond unit and divide by 1000 - MySQL doesn't appear to support milliseconds. DATEADD function Arguments date_or_time_part. If it's hard to be removed, you can ignore such invalid values by using TRY_TO_TIMESTAMP () function. 663 3 3 silver badges 11 11 bronze badges. During this Quickstart you will accomplish the following things: Load Parquet data to Snowflake using schema inference. DATE accepts dates in the most common forms ( YYYY-MM-DD, DD-MON-YYYY, etc. 2 to 4. 000'::Timestamp_TZ, 'yyyy-mm-dd hh:mi:ss') 2021-07-19 02:45:31. The unloader follows this pattern when writing values to Parquet files. For example, an offset of 2 returns the expr value with an interval of 2 rows. @Sriganesh Palani (TechMahindra Limited) - You're trying to set the default value of the column to a string. To Here is an example of changing a TIMEZONE at the session level: ALTER SESSION SET. Snowflake support responded as follows: As per my investigation and internal research, the behaviour mentioned by you is a known one. datediff (timestamp) function. Create bins. 0. Por exemplo, DATEDIFF (milliseconds, '00:00:00', '00:00:01. 入力が BINARY の場合のバイト数。. TIMESTAMP_DIFF TIMESTAMP_DIFF(timestamp_expression_a, timestamp_expression_b, date_part) Description. Snowflake does not currently support explicitly-typed objects. Issue. On desktop, click the ⚙ button next to your name and look in the Advanced tab. The default setting for this parameter is YYYY-MM-DD HH24:MI:SS. Note that TIMESTAMPDIFF returns a signed integer value, and. DATEDIFF의 경우: date_or_time_expr1 및 date_or_time_expr2 는 날짜, 시간 또는 타임스탬프일 수 있습니다. 1. 1 to be 0. OWASP Dependency Check: Reported. Goal: 1) Ability to convert unix timestamp column labelled "PAYMENT. 2018-08-12 12:20:00. Returns the current timestamp for the system, but in the UTC time zone. If it has trouble, you can also give it a hint by providing input formatting preferences. 1 Answer. The expression must be of type DATE or TIMESTAMP_NTZ. Each date value contains the century, year, month, day, hour, minute, second and milliseconds. This allows me to find the number of. "Day Date") similarly we can write the formulas using different intervals based on the date format in. The output format for timestamp_ltz values is set using the TIMESTAMP_LTZ_OUTPUT_FORMAT parameter. Os segundos fracionários não são arredondados. Syntax: DATEPARSE(date_format, date_string) Output: Date: Definition: The <date_format> argument describes how the <date_string> field is arranged. Every clients we've tested will both the ODBC and JDBC drivers will auto-translate it back to your local timezone. It requires parentheses ( SYSDATE () ), whereas CURRENT_TIMESTAMP can be. but in my case, while passing string paramter( which is date actually), user has 3 different formats (YYYY-MM-DD, YYYYMMDD, MM/DDYYYY) MS SQL can convert all the three formats into date correctly, but failes to do that. Expand Post. Dean Flinter Dean Flinter. Equivalent Redshift query. Timestamp Datatypes in Snowflake. 000’ to ‘1702-02-06 00:25:26. 日時がパーティションキーとして利用することが多いため、日時関数を使用する機会が多いはずです。. 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. So, i think, hive considers date + time difference but snowflake consider only date part and time part is ignored. To get the difference in. The function supports units of years, quarters, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, and nanoseconds. The function counts whole elapsed units based on UTC with a DAY being 86400 seconds. これらの関数（および日付部分）はセッションパラメーターを無視します. The DATE_DIFF divides the days with 29 for February for a leap year and 28 if it is not a leap year. Create a set of data such that: 1 row has all nulls. Create bins. Snowflake datatype is timestamp_ntz(0) In the ETL gave date pattern as "yyyy-MM-dd HH:mm:ss" for both source and target . Sorted by: 1. date_or_time_expr1 and date_or_time_expr2 can be a date, time, or timestamp. There are 3 different timestamp types in Snowflake: Is there a simple way to do this in snowflake, something like: select TO_TIMESTAMP_TZ(column_name, 'America/Chicago') from table_name; snowflake-cloud-data-platform Snowflake supports creating temporary tables for storing non-permanent, transitory data (e. The formula below uses the Timestampdiff function to return the number of minutes between the two columns, then divides that number by the number of minutes in a day (24 hours times 60. which yields an output of: float_serial_number. Modified 3 years ago. I have been using mysql as source and loading into our snowflake db . json_data:date_payment" into human readable format Ex. Answer. SQL Server : -- Get difference in days SELECT DATEDIFF ( dd, '2022-09-01', '2022-09-05'); # 4. . Discussion: To calculate the difference between the timestamps in MySQL, use the TIMESTAMPDIFF (unit, start, end) function. to_char converts a date using a format. If you have a table for_stacko_timeline with a column ts, you can find the minimum and maximum timestamp. i want to subtract time from datetime so my result should look like 2021-11-25 8:48:39. <target_tz> represents a string that specifies the desired timezone to which the input timestamp should be converted. 4. It is easy for machines to parse and generate. Create a data engineering pipeline with Python stored procedures to incrementally process data. Temporary tables only exist within the session in which they were created and persist only for the remainder of the session. Converting Timestamp to Date in Snowflake. 2025-01-01. It's INTERVAL 7 DAY, not INTERVAL 7 DAYS. If a non-integer decimal expression is input, the scale of the result is inherited. The data type and precision of an output column are set to the smallest data type and precision that support its values in the unload SQL statement or source table. working_day_start_timestamp then w. ; TIME: You can use time type to store hour, minute, second, fraction with (includes 6 decimal positions). *) returns the number of rows that do not contain any NULL values. timestampdiff¶. 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. In a Unicode database, if a supplied argument is a. TO_TIME , TIME. 1. davies (Snowflake) with numberofhols as (-- count number of holidays. 1 to 1. Improve this answer. When connecting to Snowflake, Tableau returns a different timestamp than what is displayed in Snowflake. In this example, the local time zone is US. [1] A known issue in Snowflake displays FLOAT, FLOAT4, FLOAT8, REAL, DOUBLE, and DOUBLE PRECISION as FLOAT even though they are stored as DOUBLE. extract a certain part from a timestamp, in the example below. Conversion. time_zone;部分文字列が始まるオフセットを指定します。. The timediff () function takes exactly two arguments which are both time values. For example, if you want to add 2 days to August 1, 2018, then this will be '2018-08-01'::DATE. 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. TIMESTAMP_LTZ. I know, Default format to convert string into date is YYYY-MM-DD in snowflake. 57. I have a date in YYYY-MM-DD format and want to convert this in UNIX time in snowflake. Applies to: Databricks SQL Databricks Runtime 10. Once the session ends, data stored. ; I have a Snowflake procedure, which expects a TIMESTAMP_TZ argument. 2 days, but Snowflake will produce 1 because 2 is 1 more than 1. Represents values comprising values of fields year, month, day, hour, minute, and second. Geospatial Data Types. to_timestamp. ‘HEX’, ‘BASE64’ or ‘UTF-8’). And the timestamp_ntz (no time zone) is the timestamp. The function returns the result of subtracting the second argument from the third argument. 0. I am trying to find where two values have overlapping dates, display those overlapping dates, and. Weeks, quarters, and years follow from that. In my view while taking difference between time (using DATEDIFF), both the time stamp values should be in same timezone. Modified 3 years, 5 months ago. For example in current database the record is: 10-AUG-10 05. The unit for the result (an integer) is given by the unit argument. What's the correct way to define ISO datetime's data type in Snowflake? I tried date, timestamp and TIMESTAMP_NTZ like this in my dbt sql script: JSON_DATA:",my_date"::TIMESTAMP_NTZ AS MY_DATE but clearly, these aren't the correct one because later on when I test it in snowflake with select * , I get this error: A common SQL query WHERE clause is to just pull the data for the last n seconds. The convert should get you to UTC, regardless of what timezone your Snowflake instance is set to by default. 9 and 2. 4. If you want to mimic hive logic in snowflake, you should use below code -. * from (select t. For more. This feature is in Public Preview. So here we will review three cases how to work with timestamps in Snowflake. HOUR / MINUTE / SECOND¶. snowflake::query ("alter session set. Timestamp is a method for row versioning. Modified 5 years ago. SELECT ( (extract (epoch from ( '2012-01-01 18:25:00'::timestamp - '2012-01-01 18:25:02'::timestamp ) ) ) )::integer. The functions in this section use a format string that is compatible with JodaTime’s DateTimeFormat pattern format. the datediff truncate to the unit you are finding the diff over. On the ingestion side, Snowflake can take any suitable timestamp string (single quotes) wherever a timestamp is needed and will try to parse it. The following statement uses the TO_CHAR() function to format values in the logged_at column:. Accepts relevant date and time parts (see next section for details). DATEUnlike Teradata snowflake doesn't support subtraction between two timestamp. I have used TO_TIMESTAMP and TO_DATE functions in SELECT query and not able to print the expected result. ; ExamplesIf you haven't started writing an app with snowflake, it reads like a lot of a smoke. time_zone, @@session. Follow. you can't write INTERVAL 1. Moving averages in Snowflake are an excellent way to discover patterns in your data. Snowflake support responded as follows: As per my investigation and internal research, the behaviour mentioned by you is a known one. Usage Notes¶. A number of seconds (if scale = 0 or is absent) or fractions of a second (e. The setting of the TIMESTAMP_TYPE_MAPPING parameter does not affect the return value. There are several ways to approach this, but here's the way I do it with SQL Generator function Datespine_Groups. Here is an example, where a table which has 2 columns abc (string) and timestamp (TIMESTAMP_TZ (9)). java8 to 5. DATEDIFF の場合: date_or_time_expr1 および date_or_time_expr2 は、日付、時刻、またはタイムスタンプにすることができます。. Spark SQL provides built-in standard Date and Timestamp (includes date and time) Functions defines in DataFrame API, these come in handy when we need to make operations on date and time. Data Types. alter session set timestamp_output_format = 'YYYY-MM-DD HH24:MI:SS' UPDATE table SET TIMESTAMP=current_timestamp. Upgraded snowflake-jdbc from 3. 21 by @dependabot in #3061. Then, you’ll delete data and set up. If the value is of type TIMESTAMP_TZ, the time zone is taken from its value. 13:04:11) In general, if you want to work with time zones, you'll need to stick with. 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 depth if required Add links and other resources as. Paste in a Discord snowflake to get the timestamp. working_day_start_timestamp else t. g. The following example uses the date format M/D/YYYY. g. The default Time Travel retention period is 1 day (24 hours). one of the easy way to convert timestamp into date in snowflake is If you have created_date = 2023-10-18 08:36:59. However, this answer is definitely the "easiest" way to go. timestamp "2022-01-02T12:30:30. TIMESTAMP_DIFF. SELECT * FROM (My query) AS q LEFT JOIN (SELECT TO_CHAR(CURRENT_TIMESTAMP, 'YYYY-MM-DD HH24:MI') AS Time_of_Query) AS tMar 27, 2013 at 14:06. The expression to be returned based on the specified offset. Ask Question Asked 3 years, 5 months ago. That offset code tells us the time zone of timestamps. This is the date, time, or timestamp to which you want to add. I want to be able to compare the date between the first record and any future records for that card id where that future record's legit = 0, and if the first record is within 10 days, show that record. fron. 13. These sets include more specific functions like CURRENT_DATETIME, DATE_SUB, EXTRACT, FORMAT_TIME, and so on. 18. Extracts the three-letter day-of-week name from the specified date or timestamp. Here's an example: SELECT TO_TIMESTAMP ( 1618302181) AS utc_timestamp; In this example, the epoch value 1618302181 is converted to the UTC timestamp 2021-04-13 13:49:41. Extracts the corresponding time part from a time or timestamp value. Java Date Functions. 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. docs. That is correct: Unlike other databases, MVIEWS in Snowflake are a very targeted and simplified feature. Now, let’s automate the stream and have it run on a schedule. CURRENT_TIMESTAMPLearn the syntax of the to_timestamp function of the SQL language in Databricks SQL and Databricks Runtime. 1 to 3. 1. Provide details and share your research! But avoid. String concatenation will build '1' + ',' + '27'. working_day_start_timestamp else t. The function supports units of years, quarters, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, and nanoseconds. In general, window functions can be grouped into 3 types: Navigation functions: Return the value given a specific location criteria (e. Histograms. 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. Possible values are year, quarter, month, or week (or any of their supported variations). TIMESTAMP_TZ_OUTPUT_FORMAT. Snowflake SQL Query - Invalid Argument Function Using DATEADD() Hot Network QuestionsTIMESTAMPDIFF () supports the analysis of historical data by providing precise measurements of time intervals. working_day_start_timestamp then w. dates from the DATEDIFF() 1. TIMEDIFF. TIMESTAMP_TZ. Solution. e. . Bump snowflake-jdbc from 3. TO_TIMESTAMP / TO_TIMESTAMP_* Time Zone. 58. This is the date or timestamp expression to which you want to add a specified number of months. I've been stumbling with this issue for a couple days now, and cannot seem to figure out why, when my getdate() insert into the columns are providing a millisecond decimal to the military time format, I still cannot seem to be able to pull a decimal format datediff() result. In case of NULL input it will result in to NULL. Returns the whole number of specified date_part intervals between two timestamps (timestamp_expression_a - timestamp_expression_b). No security updates needed in this release. Datetime is a datatype. Extracts the specified date or time part from a date, time, or timestamp. Because of the variety of ways the string field can be ordered, the <date_format> must match exactly. Source datatype is datetime . Conclusion. elapse)/60 as diff from( SELECT c1. Q1. 098 you want 2023-10-18. no additional licensing is required; however, standard Time Travel is 1 day. It does this for every unit, second, hour, day, month. Date and time values can be stored as. TIMESTAMPDIFF. Create a temporary table using insert into. Date difference is 23, if you are counting number of different days. If date_or_time_part is week (or any of its variations), the output is controlled by the session parameter. Operators are represented by special characters or keywords; they do not use function call syntax. TIMESTAMP_TRUNC. 6 Answers. mcguigan (Snowflake) 4 years agoThe Snowflake Convert Timezone command consists of the following arguments: <source_tz> represents a string that specifies the time zone of the input timestamp. Timestamp Datatypes in Snowflake. with data as ( select current_timestamp () datetime ) select to_char (datetime, 'YYYYMMDD')::int from data. we have overloaded input columns where we need to check that a column is a valid date - if it contains for example '99' I need to get a false when I check but using cast as timestamp for example gives 99 daus since 19700101 - so I get the wrong result and. DATE accepts dates in the most common forms (YYYY-MM-DD, DD-MON. Snowflake loads the string in America/Chicago time. g. 848 -0400 '2021-06-10 14:07:04. For the 2-argument version: The source_timestamp argument is considered to include the time zone. If start is greater than end the result is negative. An OBJECT can be used to create hierarchical data structures. Moving averages. One month is considered elapsed when the calendar month has increased and the calendar day and time is equal or greater to the start. If the value is of type TIMESTAMP_TZ, the time zone is taken from its value. utc). net. Summary Statistics. TIMESTAMPDIFF¶ Calculates the difference between two date, time, or timestamp expressions based on the specified date or time part. date_or_time_expr. 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. I know, Default format to convert string into date is YYYY-MM-DD in snowflake. target_data_type must be one of the following:. For example, the chart below shows the daily temperature in London as points, and a 30 day moving average as a line.