If you build on Salesforce long enough, you will hit a lock. This post explains how Salesforce Record Locking and Concurrency work, why you see UNABLE_TO_LOCK_ROW, and how to write code that behaves correctly under load.
Mastering Salesforce permissions and access requires understanding multiple layers of security that work together in both Salesforce Classic and Lightning Experience. This learning plan is organized into modules that progress from fundamental concepts (suitable for beginners and Admins) to advanced topics (for experienced Developers and Architects). The core security model is the same in Classic and Lightning, with only the setup interface differing slightly.
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Does OpenAI sell my data or will it use business data to train its own LLM? I have explained every question you have around OpenAI Data Policies.