I'm using a postgresql (15.5) database with the following logic: We have "meters" who measure electrical consumption. We have "computer meters" who are calculation of the measurements of different meters. For exemple "computedMeterA" = "meterA" + "meterB" I have classical…
I am not sure on how to begin optimizing this High Latency SQL query that my platform runs. Other than reducing the datasets, what are some things that I can do? SELECT ctm.* FROM compound_transaction_map ctm JOIN bustransaction_map btm ON…
I am working with a MySQL database and I have a column (let's call it status_column) which contains comma-separated values. The possible values in this column are 'NA', 'NON_NA', 'PSG_REQUIRED', or any combination of these, such as 'NA,PSG_REQUIRED' or 'PSG_REQUIRED,NON_NA',…
I am trying to benchmark MongoDB using berlinMOD data and queries. To represent a single vehicle's trip (trajectory), I'm using multiple documents (point based representation). a Sample: [{ "_id": 3, "tripid": 11, "geom_lnglat": { "type": "Point", "coordinates": [ 4.306468999999999, 50.873466799999974…
Caused by: org.hibernate.exception.GenericJDBCException: Unable to open JDBC Connection for DDL execution [Access denied for user 'root'@'localhost' (using password: YES)] [n/a] Caused by: org.hibernate.exception.GenericJDBCException: Unable to open JDBC Connection for DDL execution [Access denied for user 'root'@'localhost'@'localhost' (using password: YES)] [n/a]…
I'm working on a project where we aim to have a separate database for each tenant. In our setup, there is a central database (and API) containing a "users" table that stores usernames and passwords for all users. Additionally, this…
[ steps ] stop artifactory stop mysql Upgrade Ubuntu 14.04 to 16.07 Upgrade mysql-server to 5.7 Downloaded 7.75.5.tar.gz file put it into /opt/jfrog/artifactory untared 7.77.5.tar.gz removed /opt/jfrog/artifactory/app cp -r /opt/jfrog/artifactory/7.77.5/app/* /opt/jfrog/artifactory/app started up mysql-server started artifactory. Looking at console.log got…
I have a web application TODO list. Users can add, modify, and delete tasks. Issue is that every user who log in to my web application can see all tasks that are created by other users. My idea is to…
I have a hierarchical lineage for object dependency in json format. The json itself has a very simple structure but it has variable depth. I have attached an image to show the tree structure. The depth of the json could…
I created person table, then inserted 2 rows into it as shown below: CREATE TABLE person ( id INT, name VARCHAR(20), age INT ); INSERT INTO person (id, name, age) VALUES (1, 'John', 27), (2, 'David', 32); Then with an…