---
title: "#data-extension articles | Hashnode"
description: "Explore the latest #data-extension articles, tutorials, and guides on Hashnode."
url: "https://hashnode.com/tag/data-extension"
---

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# #data-extension

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[SapotaCorp](https://hashnode.com/@sapotacorpvn) · [May 24](https://hashnode.com/posts/designing-the-sfmc-data-model-before-you-create-a-single-de/6a127ed0ddd318bf23c99741)

### [Designing the SFMC Data Model Before You Create a Single DE](https://sapotacorpvn.hashnode.dev/designing-the-sfmc-data-model-before-you-create-a-single-de?utm_source=hashnode&utm_medium=feed)

Most Salesforce Marketing Cloud projects end up with a Data Extension sprawl that can't be joined, segmented, or reported on. The fix is a 30-minute data model exercise before the first DE gets created.

4 min read · [sapotacorpvn.hashnode.dev](https://sapotacorpvn.hashnode.dev/designing-the-sfmc-data-model-before-you-create-a-single-de?utm_source=hashnode&utm_medium=feed)

[SapotaCorp](https://hashnode.com/@sapotacorpvn) · [May 24](https://hashnode.com/posts/designing-a-data-extension-in-sfmc-the-four-decisions-first/6a127d482018432660407b28)

### [Designing a Data Extension in SFMC: The Four Decisions First](https://sapotacorpvn.hashnode.dev/designing-a-data-extension-in-sfmc-the-four-decisions-first?utm_source=hashnode&utm_medium=feed)

Client hands you a 40-column Excel file and says 'import this into SFMC.' Copying columns verbatim is how you end up with a DE that can't send email. Four decisions to make before you create the DE.

4 min read · [sapotacorpvn.hashnode.dev](https://sapotacorpvn.hashnode.dev/designing-a-data-extension-in-sfmc-the-four-decisions-first?utm_source=hashnode&utm_medium=feed)

[SapotaCorp](https://hashnode.com/@sapotacorpvn) · [May 24](https://hashnode.com/posts/sfmc-import-update-types-add-only-add-and-update-overwrite/6a127d23ba30e45856c5bc9f)

### [SFMC Import Update Types: Add Only, Add and Update, Overwrite](https://sapotacorpvn.hashnode.dev/sfmc-import-update-types-add-only-add-and-update-overwrite?utm_source=hashnode&utm_medium=feed)

SFMC has four import update types. Picking the wrong one corrupts the DE in ways that don't show up until the next campaign runs. Here's how we pick on production engagements.

4 min read · [sapotacorpvn.hashnode.dev](https://sapotacorpvn.hashnode.dev/sfmc-import-update-types-add-only-add-and-update-overwrite?utm_source=hashnode&utm_medium=feed)

[SapotaCorp](https://hashnode.com/@sapotacorpvn) · [May 24](https://hashnode.com/posts/seven-types-of-data-extensions-we-use-on-sfmc-projects/6a127cc1ba30e45856c44078)

### [Seven Types of Data Extensions We Use on SFMC Projects](https://sapotacorpvn.hashnode.dev/seven-types-of-data-extensions-we-use-on-sfmc-projects?utm_source=hashnode&utm_medium=feed)

Beyond the basic sendable DE, SFMC has several DE types with specific behaviors. Knowing when to use each saves architecture rebuilds later. Here's the reference sheet we use.

4 min read · [sapotacorpvn.hashnode.dev](https://sapotacorpvn.hashnode.dev/seven-types-of-data-extensions-we-use-on-sfmc-projects?utm_source=hashnode&utm_medium=feed)

[SapotaCorp](https://hashnode.com/@sapotacorpvn) · [May 24](https://hashnode.com/posts/why-sfmc-sends-to-the-old-email-all-subscribers-list-override/6a127c600b516b808033cd13)

### [Why SFMC Sends to the Old Email: All Subscribers List Override](https://sapotacorpvn.hashnode.dev/why-sfmc-sends-to-the-old-email-all-subscribers-list-override?utm_source=hashnode&utm_medium=feed)

Customer updated their email. The Data Extension has the new address. SFMC still sends to the old one. The reason is the All Subscribers List - and the fix is one extra import step.

6 min read · [sapotacorpvn.hashnode.dev](https://sapotacorpvn.hashnode.dev/why-sfmc-sends-to-the-old-email-all-subscribers-list-override?utm_source=hashnode&utm_medium=feed)