I’m trying to join 2 tables and count the number of entries for unique variables in one of the columns. In this case I’m trying to join 2 tables – patients and trials (patients has a FK to trials) and count the number of patients that show up in each trial. This is the code i have so far: Th…
Tag: count
SQL how to create a view with 2 sums of diferent tables, when those tables have diferent number of rows
I have 3 tables, “accounts” “charges” and “payments” I want to create a view with the account data the sum of the charges, and the sum of the payments, but payments have usually more records than charges for the same account when I create the view and GROUP BY charges end u…
SQL want efficient query to SELECT columnA, columnB FROM table1 WHERE both columnA, columnB are in columnC FROM table2 WHERE columndD > value
I’m searching for a more efficient method to accomplish something that I’ve already solved with a few different SQL statements. The problem: I have two tables a transactions table, and an accounts table The transactions table has columns that look like: acct_sending acct_receiving amount tx_dateti…
SQL count() not showing values of 0
i just started my journey with SQL, and made some tables of Cyclists, and Cycling Teams. Cyclist’s table contains columns: ID, Name, Team (which is foreign key of TEAMS ID) Team’s table contains columns: ID, Name, Number of Cyclists I want to Count number of Cyclists in each team, by using count()…
Count and Group by 2 different columns SQL
I have below table and want to find out a count and group by that will show the number of times republic of ireland played a particular opponent regardless if they are the home team or away team I want something that will show like the below Thanks for help! Answer This is how I would do it — normalize
Can I get two count results in a query?
I am using MariaDB. I want to have two count results in a query. The first query is: Next is: What I want to get is: How can I combine them? Answer The usual way is to make a Case..When statement that is one or zero for the desired condition and then SUM it, not COUNT it.
How can eliminate the line that counts everything [COUNT function in SQL]
I was running a code where I needed to see the top 10 results in a table. Unfortunately, I am with one more row that I was expecting. My results was the following: [Result after the query][1] [1]: https://i.stack.imgur.com/KCu7W.png Is there any way I can eliminate row 1 from my query? Thank you in advance fo…
Simplifying SQL query
I’m using the Bixi public dataset found at https://www.bixi.com/en/open-data and have been asked to find “the average number of trips a day for each year-month combination in the dataset”. Here’s an example of the table from which I’m querying: id start_date start_station_code en…
GROUP on one column and aggregate counts based on distinct values in another column
I have a table with values like so: I want to do a GROUP BY based on ts and display the counts for distinct values of usr_id like below. ts count of A count of B count of others 11 2 1 3 22 0 1 0 33 1 0 3 http://www.sqlfiddle.com/#!9/bbf4fc/2 I couldn’t make much progress beyond doing the
Count users with a condition in MYSQL
I have a table ‘helpdesk’ (detail below) that lists tickets. I’m trying to get the top 10 users who report issues, however there is a complication in the fact that users can report an issue for another user (think secretary for their boss as an example). The table structure is… Using t…