count

问题 I can calculate the number of ids in a month and then sum it up over 12 months. I also get the average using this code. select id, to_char(event_month, 'yyyy') event_year, sum(cnt) overall_count, avg(cnt) average_count from ( select id, trunc(event_date, 'month') event_month, count(*) cnt from daily where event_date >= date '2019-01-01' and event_date < '2019-01-31' group by id, trunc(event_date, 'month') ) t group by id, to_char(event_month, 'yyyy') The results looks something like this: ID|

问题 I'm using Spark with Java connector to process my data. One of the essential operations I need to do with the data is to count the number of records (row) within a data frame. I tried df.count() but the execution time is extremely slow (30-40 seconds for 2-3M records). Also, due to the system's requirement, I don't want to use df.rdd().countApprox() API because we need the exact count number. Could somebody give me a suggestion of any alternatives that return exactly the same result as df

问题 I have table containing two DATE columns. TS_customer and TS_verified I am searching for a way to get a result where in the first column I have dates where either someone created a user (TS_customer) or someone got verified (TS_verified). In the second column I want count(TS_customer) grouped by the first column. The third column I want count(TS_verified) grouped by the first column. It might be 0 customers verified on a sign up date, and in another case 0 signups on a date someone got

问题 There are already a couple of similar questions: Splitting textarea sentences into array and finding out which sentence changed on keyup() JS RegEx to split text into sentences Javascript RegExp for splitting text into sentences and keeping the delimiter Split string into sentences in javascript My situation is a bit different. I need to count the number of sentences in a string. The closest answer to what I need would be: str.replace(/([.?!])\s*(?=[A-Z])/g, "$1|").split("|") The only problem

问题 There are already a couple of similar questions: Splitting textarea sentences into array and finding out which sentence changed on keyup() JS RegEx to split text into sentences Javascript RegExp for splitting text into sentences and keeping the delimiter Split string into sentences in javascript My situation is a bit different. I need to count the number of sentences in a string. The closest answer to what I need would be: str.replace(/([.?!])\s*(?=[A-Z])/g, "$1|").split("|") The only problem

问题 I have a Google sheet with fixed number of columns and dynamic rows. I like to use countA to count fields with a value (non-blank) in the current row. I found a formula here but don't understand it, neither can get it to work. ArrayFormula(MMULT( LEN(A1:E)>0 ; TRANSPOSE(SIGN(COLUMN(A1:E1))))) Sheet gives me error: "Function MMULT parameter 1 expects number values. But 'TRUE' is a boolean and cannot be coerced to a number." 回答1: The formula should work if you convert the booleans (true or

问题 I have a Google sheet with fixed number of columns and dynamic rows. I like to use countA to count fields with a value (non-blank) in the current row. I found a formula here but don't understand it, neither can get it to work. ArrayFormula(MMULT( LEN(A1:E)>0 ; TRANSPOSE(SIGN(COLUMN(A1:E1))))) Sheet gives me error: "Function MMULT parameter 1 expects number values. But 'TRUE' is a boolean and cannot be coerced to a number." 回答1: The formula should work if you convert the booleans (true or

问题 I was just wondering if there is any way to get two separate "count" totals from a table using one query? That is, using a table similar to the following I would like to retrieve each code (distinct) and show the total number of status' NOT equal to X or D, and then have an additional column that shows the total number of status' equal to X or D and the cancel date is greater than a given date (say, the last 14 days). Table: Code: Status Cancel_Date ----------------------------------- AAA X

来源： https://stackoverflow.com/questions/64796385/matlab-count-string-occurrences-in-table-columns

来源： https://stackoverflow.com/questions/64796385/matlab-count-string-occurrences-in-table-columns