Alishka-databases-w3 #29
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| ### 1. What columns violate 1NF? | ||
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| The columns **food_code** and **food_description** violate 1NF because they contain multiple values separated by commas instead of atomic values. In 1NF, each column must contain only a single value. |
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Correct! You might want to also take a look at the dinner_date which also has something weird about it
| - **Members** | ||
| - **Dinners** | ||
| - **Venues** | ||
| - **Foods** |
| - **Venues** | ||
| - **Foods** | ||
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| ### 3. Name all the tables and columns that would make a 3NF compliant solution. |
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Perfect! It shows that you understood really well how data is stored and relate to each other, congratulation!
There is one relation that you might have missed, there is a relation between members and dinners, maybe you can think about it and see what needs to be added to have the perfect database schemas 🚀
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| function transferAmount() { | ||
| connection.beginTransaction(err => { |
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It does works and it does a transaction thanks to the usage of rollback and commit.
One thing to keep in mind is this way of coding transaction will only works in NodeJS/Javascript. To make transaction that would work no matter the language, they need to be done directly in SQL using the SQL statement TRANSACTION, ROLLBACK and COMMIT
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