I’m doing UNION in MySQL that I’m unable to troubleshoot for a while. Error says that syntax is incorrect around t1.* Those 2 SELECTs work ok separately, checked. But UNION fails. I’m not custom …
Sum of an adjacent column within a conditional range
I have a script that is trying to collate some census data. SELECT tbl.State, tbl.ranges, tbl.race, tbl.origin, tbl.sex FROM (select case when age between 18 and 23 then ’18-23′ when age …
Store the same Unique Number for different users in MySql
I have a Employee Table that stores unique Employee numbers in the emp_no column. The thing is if another user or company stores its Employees in the same table and have an employee with the same …
Skipping the header while reading the CSV file through Oracle external Table
Using the external table we are reading the CSV file which contains header. I am using SKIP 1 as a command to skip the header. When we have a single file it is working fine and able to file using …
Find data from json/jsonb column by array in Postgresql
I have a column with json/jsonb data. Database is postgresql. column data sample {“postId”: “p522”, “groupId”: “g11”, …} {“postId”: “p5ds”, “groupId”: “g234”, …} {“postId”: “p5cz”…
Flagging amount thresholds reached per user
Story: Two conditions: I need to calculate the amount of days it takes a user to spend over 20, 50 and 100$ based on his register_date If someone’s first purchase is > 100$ then the amount of days …
How can i get a zero in front of the week number when it is a one-digit number?
I want to get the week number, and I did using DATEPAR(WEEK,DATE) , however, one-digit week numbers do not come with a zero in front. Basically I need to get 01, 02, 03 instead of 1, 2, 3.
How to dynamically select columns in Oracle? is this possible?
I have the below data set: NAME 2012 2013 2014 2015 2016 2017 2018 2019 JOHN 180 185 192 205 199 198 …
Ruby on Rails iterate through column efficiently
created_at iteration group_hits_per_iteration ——————————————————————– 2019-11-08 08:14:05.170492 300 34 2019-…
Joining INTO many-to-many table (From Primary Key Table)
This is how far i have gotten, though i don’t think it can be done with 1 SQL-statement, i just want to confirm whether or not it is possible to do this with ONLY 1 statement: SELECT * FROM users …