How to order and partition by multiple columns?
I am using PostgreSQL.I have a table with 2 columns in this example:I want to add a new column with a unique id corresponding to partitions by name…
3 Answers · 23.7K Views · Answered ✓
I am using PostgreSQL.I have a table with 2 columns in this example:I want to add a new column with a unique id corresponding to partitions by name…
3 Answers · 23.7K Views · Answered ✓
I have a busy database with solely InnoDB tables which is about 5GB in size. The database runs on a Debian server using SSD disks and I've set max…
1 Answer · 815 Views · Answered ✓
I can insert multiple rows into a table with default values for all columns the RBAR way:create table course(course_id serial primary key);do $$begin…
1 Answer · 1.8K Views · Answered ✓
UBUNTU 22.04.1, mysql ver 8.0.30(1) I get sudo apt install mysql-server thensudo mysql_secure_installationGet in loop this error for each complicated…
3 Answers · 8.0K Views · Answered ✓
I'm trying to create a thumbnail for the video using plyr - https://github.com/sampotts/plyr I can get the blob as in the below codepen:…
1 Answer · 1.7K Views · Answered ✓
public class ContactSearch { public static list searchForContacts(string lastname,string MailingPostalCode) { listContactList=[select…
1 Answer · 1.5K Views · Answered ✓
I know Salesforce can work as identity or service provider for internal users (standard Salesforce license) However, is it possible to use Salesforce…
1 Answer · 920 Views · Answered ✓
I'm unable to cover the code coverage for catch block.Kindly help me to cover that code lines as well.Apex Class:
3 Answers · 3.7K Views · Answered ✓
As you can see, it is about a binary classification with linearSVC. The class 1 has a higher precision than class 0 (+7%), but class 0 has a higher…
1 Answer · 876 Views · Answered ✓
I have a data frame which contains duplicates I'd like to combine based on 1 column (name). In half of the other columns I'd like to keep one value…
1 Answer · 1.1K Views · Answered ✓
I'm studying machine learning from Andrew Ng Stanford lectures and just came across the theory of VC dimensions. According to the lectures and what I…
1 Answer · 1.1K Views · Answered ✓
How could I randomly split a data matrix and the corresponding label vector into a X_train, X_test, X_val, y_train, y_test, y_val with scikit-learn?…
1 Answer · 840 Views · Answered ✓
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