I have a postgresql table contains a list of email addresses. The table has three columns, Email, EmailServer (e.g., gmail.com, outlook.com, msn.com, and yahoo.com.ca etc.), and Valid (boolean). Now, I want to group those emails by EmailServer and then update the first 3 records of each large group (count >=6) as Valid = true while leaving the rest of each
Grouping columns to find most popular product for each country
I’m a SQL beginner, practicing through various sources. I have a table called marketing_data containing product sales information, country and other variables where I’m trying to get an output for the most popular product per country, based on sales. I don’t know where to begin with my syntax. This is how the data looks in the table I’ve previously run
SQL query to extract matching diagonal pairs in SQL Server database
I have a database table (mytable) with 2 columns x and y as shown below, from which I intend to extract rows with matching diagonal pairs of (x,y) and (y,x) e.g., 4 21 and 21 4 I have tried the accepted code on stackoverflow here (enter link description here) on my mytable which gives me the expected results on Oracle
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_datetime 100 101 10 yyyy-mm-dd hh-mm-ss 101 100 5 yyyy-mm-dd hh-mm-ss 101 200 1 yyyy-mm-dd hh-mm-ss
How would I make my SQL statement show only the first line (lowest price + total purchases)
I’ve got this SQL exercise I’m trying to complete but I can’t figure out how to specifically show one row that should contain the media type with the lowest # of purchases and purchase value. I’m completely unsure of what I should add after my ‘group by’? So this is what I want my output to be: https://i.stack.imgur.com/5biiM.png And this
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.
Number of Customer Purchases in Their First Month
I have a list of customer orders. I can easily calculate the month and year of first purchase for each customer (e.g. customer 1 had their first purchase in Sept 2021, customer 2 had their first purchase in Oct 2021, etc.). What I want to add is an additional column that counts the number of purchases a customer made in
Select highest aggregated group
I’m having trouble with selecting the highest aggregated group. I have data in a table like this: Sales table: ID GroupDescription Sales 1 Group1 2 1 Group1 15 1 Group2 3 1 Group3 2 1 Group3 2 1 Group3 2 2 Group1 2 2 Group2 5 2 Group3 3 2 Group4 12 2 Group4 2 2 Group4 2 I want
SQLite: how to exclude records in a database with join tables?
I have a database with a schema similar to: Say they have the following data in them: Artists: artist_id artist_name 1 Bob 2 Shawn Songs: song_id song_name 1 one song 2 another song song_artist: song artist 1 1 1 2 2 2 Here, both Bob and Shawn are involved in one song, and only Shawn is involved in another song.