Useful tips for everyday
Do database schemas change frequently? These are unfortunately frequent and necessary, especially when introducing new features to existing applications. Schema changes can be performed in…
What does awaiting release mean? The ‘Awaiting release from previous registrar’ status means that the transfer is being processed in a regular way and no…
What does unsubscribed mean in constant contact? When contacts choose to stop receiving emails from you and opt out of your contact list: They’re marked…
How do you call Apex from a VF page? To call an Apex class from custom button or link on the object detail page, create…
How do I sum multiple rows in access? Add a Total row Make sure that your query is open in Datasheet view. To do so,…
Can you export fields from Salesforce? You can export account, lead, contact, campaign member, custom object, or solution reports from the Salesforce platform to create…
How do I query a JSON column in PostgreSQL? Querying JSON data PostgreSQL returns a result set in the form of JSON. PostgreSQL provides two…
Why is R-squared equal to correlation? The R-squared value, denoted by R 2, is the square of the correlation. It measures the proportion of variation…
How to run a service a non-root user completely? The SystemD service you have should start when you boot the machine, as the dev001 user.…
How do you know when your learning algorithm has overfitting a model? The common pattern for overfitting can be seen on learning curve plots, where…