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๐Ÿ“„ Docs: ์žฌ๊ณ  ๊ด€๋ฆฌ ๊ธฐ๋Šฅ ๋ช…์„ธ (#3)
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djdongjae committed Mar 22, 2024
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28 changes: 28 additions & 0 deletions project_functions/inventory.md
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# ์žฌ๊ณ  ๊ด€๋ฆฌ ๊ธฐ๋Šฅ



### ๋ฉ”๋‰ด ๋ฐ ์žฌ๊ณ  CRUD

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์šฐ์„  ๊ธฐ๋ณธ์ ์œผ๋กœ ๋ฉ”๋‰ด ๋ฐ ์žฌ๊ณ (์žฌ๋ฃŒ)์˜ CRUD ๊ธฐ๋Šฅ์„ ๊ตฌํ˜„ํ•ฉ๋‹ˆ๋‹ค. ์žฌ๊ณ ์™€ ๋ฉ”๋‰ด๋Š” N:M ๊ด€๊ณ„๋กœ ํ•˜๋‚˜์˜ ๋ฉ”๋‰ด์—๋Š” ์—ฌ๋Ÿฌ ๊ฐ€์ง€ ์žฌ๊ณ ๊ฐ€ ์‚ฌ์šฉ๋  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ๋ฐ˜๋Œ€๋กœ ํ•˜๋‚˜์˜ ์žฌ๊ณ ๊ฐ€ ์—ฌ๋Ÿฌ ๊ฐ€์ง€ ๋ฉ”๋‰ด์— ์‚ฌ์šฉ๋  ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค. ๋”ฐ๋ผ์„œ ๋ฉ”๋‰ด์™€ ์žฌ๊ณ  ์‚ฌ์ด์˜ ์—ฐ๊ด€๊ด€๊ณ„๋ฅผ ๋‚˜ํƒ€๋‚ด๋Š” ํ•˜๋‚˜์˜ ํ…Œ์ด๋ธ”์ด ์ถ”๊ฐ€์ ์œผ๋กœ ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค.
![Alt text](<Screenshot 2024-03-23 at 4.49.03 AM.png>)

> ๐ŸŽฏ ๊ฐ ํ…Œ์ด๋ธ”์˜ ํ•„๋“œ๋Š” ์ถ”๊ฐ€๋  ์ˆ˜ ์žˆ์Œ
### ์žฌ๊ณ ๋ณ„ ํ‰๊ท  ์‚ฌ์šฉ๋Ÿ‰ ๊ณ„์‚ฐ

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์žฌ๊ณ ๋Ÿ‰ ์กฐ์‚ฌ ๋ฐ ๋ฐœ์ฃผ ์ˆ˜๋Ÿ‰ ๊ธฐ๋ก์„ ํ†ตํ•ด ์ผ๋ณ„ ์žฌ๊ณ  ์‚ฌ์šฉ๋Ÿ‰์„ ๊ณ„์‚ฐํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์‹ค์ œ ๊ฐ€๊ฒŒ์—์„œ ๋งค์ผ ์žฌ๊ณ  ์กฐ์‚ฌ๋ฅผ ์ง„ํ–‰ํ•˜๋Š” ๊ฒฝ์šฐ๋Š” ๋“œ๋ฌธ ๊ฒƒ์œผ๋กœ ํ™•์ธ๋˜์–ด, ์ด์— ๋”ฐ๋ผ ํ‰์ผ ํ‰๊ท  ์‚ฌ์šฉ๋Ÿ‰๊ณผ ์ฃผ๋ง ํ‰๊ท  ์‚ฌ์šฉ๋Ÿ‰์„ ๊ณ„์‚ฐํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋ฐฉํ–ฅ์„ฑ์„ ์ƒ์ •ํ–ˆ์Šต๋‹ˆ๋‹ค. ์ด๋ฅผ ๊ณ„์‚ฐํ•˜๋Š” ๊ณต์‹์€ ๋‹ค์Œ๊ณผ ๊ฐ™์Šต๋‹ˆ๋‹ค.

```java
(ํ‰์ผ ํ‰๊ท  ์‚ฌ์šฉ๋Ÿ‰) = (์ผ์š”์ผ ๋งˆ๊ฐ ์‹œ ํ˜„์žฌ๊ณ ) + (ํ‰์ผ ๋ฐœ์ฃผ๋Ÿ‰) - (๊ธˆ์š”์ผ ๋งˆ๊ฐ ์‹œ ํ˜„์žฌ๊ณ )
(์ฃผ๋ง ํ‰๊ท  ์‚ฌ์šฉ๋Ÿ‰) = (๊ธˆ์š”์ผ ๋งˆ๊ฐ ์‹œ ํ˜„์žฌ๊ณ ) + (์ฃผ๋ง ๋ฐœ์ฃผ๋Ÿ‰) - (์ผ์š”์ผ ๋งˆ๊ฐ ์‹œ ํ˜„์žฌ๊ณ )
```

์ฃผ์ฐจ ๋ณ„๋กœ *๊ธˆ์š”์ผ ๋งˆ๊ฐ ์‹œ ํ˜„์žฌ๊ณ *, *์ผ์š”์ผ ๋งˆ๊ฐ ์‹œ ํ˜„์žฌ๊ณ *, *์ผ๋ณ„ ๋ฐœ์ฃผ๋Ÿ‰* ์„ ๊ธฐ๋กํ•˜๋ฉด ํ•ด๋‹น ์ •๋ณด๋ฅผ ๊ธฐ๋กํ•  ์ˆ˜ ์žˆ์œผ๋ฉฐ ๊ฒฝ์˜์ฃผ๋กœ ํ•˜์—ฌ๊ธˆ ์žฌ๊ณ ๋ณ„ ์‚ฌ์šฉ๋Ÿ‰์˜ ์ถ”์ด๋ฅผ ํ™•์ธํ•  ์ˆ˜ ์žˆ๊ฒŒ ๋„์™€์ค๋‹ˆ๋‹ค.
ํ•ด๋‹น ์ •๋ณด๋ฅผ ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค์— ๋ฐ˜์˜ํ•˜๊ธฐ ์œ„ํ•œ ์˜ˆ์ƒ ๋‹ค์ด์–ด๊ทธ๋žจ์€ ๋‹ค์Œ๊ณผ ๊ฐ™์Šต๋‹ˆ๋‹ค. ํ‰๊ท  ์‚ฌ์šฉ๋Ÿ‰ ์ž์ฒด๋Š” ๋”ฐ๋กœ ๊ธฐ๋ก์„ ํ•ด๋‘์ง€ ์•Š๊ณ  ๊ฐ€๋Šฅํ•˜๋‹ค๋ฉด NoSQL์„ ํ™œ์šฉํ•˜์—ฌ ์ €์žฅํ•˜๊ณ ์ž ํ•ฉ๋‹ˆ๋‹ค.
![Alt text](<Screenshot 2024-03-23 at 5.55.33 AM.png>)

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