ãã®ãšã©ãŒããããã°ããŠ
以äžã®ãšã©ãŒãPythonã¢ããªã±ãŒã·ã§ã³ã§çºçããŠããŸããåå ãç¹å®ããŠä¿®æ£ããŠãã ããã
Traceback (most recent call last):
File "app.py", line 23, in get_user_orders
total = sum(order["price"] * order["quantity"] for order in orders)
TypeError: unsupportâŠ
GLM 5.3 Flash
## åå
ãšã©ãŒã¡ãã»ãŒãž `unsupported operand type(s) for *: 'str' and 'int'` ã®å·ŠåŽã `order["price"]` ãªã®ã§ã**`price` ãæååïŒstrïŒãšããŠååŸãããŠãã**ã®ãåå ã§ãã`quantity` 㯠int ãªã®ã§ãæ°å€ã«ã©ã ã¯æ£åžžã«ååŸã§ããŠããŸãã
èããããåå ã¯æ¬¡ã®ãšããã§ãïŒå¯èœæ§ãé«ãé ïŒïŒ
1. **DBã® `price` ã«ã©ã ã VARCHAR / TEXT åã§å®çŸ©ãããŠãã**ïŒæãå¯èœæ§ãé«ãïŒ
2. 䜿çšããŠããDBãã©ã€ããã©ãããŒã®èšå®ã«ãããæååãšããŠè¿ãããŠãã
3. JSONãªã©çµç±ã§ããŒã¿ãååŸããŠããŠãpriceã ãæåååãããŠãã
### ç¢ºèªæ¹æ³
```python
orders = db.query("SELECT price, quantity FROM orders WHERE user_id = %s", user_id)
print(type(orders[0]["price"])) # <class 'str'> ãåºãã°ç¢ºå®
print(type(orders[0]["quantity"]))
```
MySQLãªã `DESCRIBE orders;` ã§ãPostgreSQLãªã `\d orders` ã§ã«ã©ã åã確èªããŠãã ããã
## ä¿®æ£æ¹æ³
### æ ¹æ¬å¯ŸçïŒ DBã¹ããŒããä¿®æ£ããïŒæšå¥šïŒ
éé¡ã¯æ°å€åã§æã€ã¹ãã§ããæ¢åããŒã¿ã«å€æã§ããªãå€ïŒç©ºæåãã«ã³ãä»ããªã©ïŒããªããå
ã«ç¢ºèªããŠãâŠ
å¿çæé 45.3ç§åºå 2329 ããŒã¯ã³
GPT-5 Mini
åå :
- DB ããè¿ã£ãŠãã order["price"] ãæåå (äŸ: "9.99") ã«ãªã£ãŠãããæ°å€æŒç®ã«äœ¿ããåã«ãªã£ãŠããŸããããã®ãã price ãš quantity ãæããããšãããšãã«åã®äžæŽåã§ãšã©ãŒã«ãªããŸãïŒæ°å€ã«å€æããŠããæããå¿
èŠããããŸãïŒã
- éé¡ãæ±ãå Žå㯠float ãã Decimal ã䜿ãã®ãæãŸããïŒäžžã誀差ãé¿ããããïŒã
ä¿®æ£äŸïŒæšå¥š: Decimal ã䜿ããå®å
šã«å€æã»äŸå€åŠçïŒ:
from decimal import Decimal, InvalidOperation
def get_user_orders(user_id):
rows = db.query("SELECT price, quantity FROM orders WHERE user_id = %s", user_id)
orders = []
total = Decimal('0')
for r in rows:
# æååã»æ°å€ã©ã¡ãã§ã察å¿ã㊠Decimal ã«å€æ
try:
price = Decimal(str(r['price']))
except (InvalidOperation, KeyError):
price = Decimal('0')
# quantity ãæŽæ°ã«å€æïŒäžæ£ãªã 0 ã«ãããªã©é©å®ãã³ããªã³ã°ïŒ
try:âŠ
å¿çæé 13.7ç§åºå 1469 ããŒã¯ã³
ã³ãŒãã¬ãã¥ãŒ
以äžã®TypeScript颿°ãã¬ãã¥ãŒããŠãå¯èªæ§ã»ããã©ãŒãã³ã¹ã»ãã¹ããã©ã¯ãã£ã¹ã®èгç¹ããæ¹åç¹ãææ¡ããŠãã ããã
async function fetchAllUsers(page: number = 1): Promise<any[]> {
let allUsers: any[] = [];
let hasMore = true;
let currentPage = page;
while (hasMoâŠ
GLM 5.3 Flash
# ã³ãŒãã¬ãã¥ãŒ
å
šäœçãªæ§é ã¯åãããããã§ããã**åå®å
šæ§ã»ãšã©ãŒãã³ããªã³ã°ã»å¯èªæ§**ã«æ¹åã®äœå°ãããªããããŸããéèŠåºŠé ã«æããŸãã
---
## 1. é倧ãªåé¡(ãã¹ããã©ã¯ãã£ã¹)
### `any[]` ã«ããåæ
å ±ã®åªå€±
æ»ãå€ã `any[]` ã ãšãåŒã³åºãåŽã§ã¿ã€ããã¹ãããããã£å€æŽãã³ã³ãã€ã«æã«æ€åºã§ããŸãããã€ã³ã¿ãŒãã§ãŒã¹ãå®çŸ©ãã¹ãã§ãã
### HTTPãšã©ãŒã®æªãã§ãã¯
`fetch` 㯠404 ã 500 ã§ãäŸå€ãæããŸããã`response.ok` ã確èªããªããšããšã©ãŒã¬ã¹ãã³ã¹ã® JSON ãããŒã¹ããããšããŠè¬ã®ãšã©ãŒã«ãªããŸãã
### `data.users` ã®é²åŸ¡ãã§ãã¯ãªã
APIã®ä»æ§å€æŽããšã©ãŒæã« `data.users` ã `undefined` ã ãšã`.length` ã§å³åº§ã«ã¯ã©ãã·ã¥ããŸãã
### ç¡éã«ãŒãã®ãªã¹ã¯
API åŽã®ãã°ã§åžžã«100ä»¶è¿ãå Žåãã«ãŒããçµãããŸãããæå€§ããŒãžæ°ãã¿ã€ã ã¢ãŠã(AbortSignal)ã®èæ
®ããããšå®å
šã§ãã
---
## 2. å¯èªæ§
| çŸç¶ | æ¹åæ¡ |
|---|---|
| `data.users[i].xxx` ã®ç¹°ãè¿ã | `for...of` ã§ãªããžã§ã¯ããçŽæ¥åãåã |
| `first_name + " " + last_name` | ãã³ãã¬ãŒããªãã©ã« `` `${a} ${b}` `` |
| `currentPage = currentPage + 1` | `currentPageâŠ
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GPT-5 Mini
以äžãææç¹ãšå
·äœçãªæ¹åæ¡ïŒã³ãŒãäŸä»ãïŒã瀺ããŸããå¯èªæ§ã»åå®å
šæ§ã»å
ç¢æ§ã»ããã©ãŒãã³ã¹ã®èгç¹ãé ã«åãæ±ããŸãã
äž»ãªåé¡ç¹ïŒçŸç¶ïŒ
- any ãå€çšãããŠããåå®å
šã§ãªã
- ãšã©ãŒãã³ããªã³ã°ããªãïŒHTTPãšã©ãŒã»JSONããŒã¹å€±æã§äŸå€ãæããããïŒ
- é
åã«ãŒããæç¶ãçïŒfor + indexïŒãå¯èªæ§ãäœã
- ããžãã¯ãã³ããŒïŒlimit=100ïŒãããŒãã³ãŒããããŠãã
- API ã total/pages æ
å ±ãè¿ããªã䞊åååŸã§ããã®ã«é次ååŸããŠããïŒå¿
èŠã«å¿ããŠæ¹åå¯èœïŒ
- ã¡ã¢ãªå¹çã®èæ
®ããªãïŒå€§éãŠãŒã¶ãŒæã«å
šä»¶é
åãè¿ãèšèšã«æ³šæïŒ
- ã¿ã€ã ã¢ãŠãã»ãªãã©ã€çã®å
ç¢æ§å¯Ÿçããªã
æ¹åæ¡ïŒæšå¥šå®è£
ïŒ
- åå®çŸ©ã远å ããïŒã¬ã¹ãã³ã¹ãšæ»ãå€ïŒ
- fetch ã®ã¹ããŒã¿ã¹ããã§ãã¯ãJSON è§£æã«å¯Ÿãã try/catch
- filter + map ã䜿ãå¯èªæ§ãåäž
- const ãå€çšããå代å
¥ã¯æå°å
- limit ã宿°å
- å¿
èŠãªã䞊åååŸã async generator ãå©çšããŠã¡ã¢ãªäœ¿çšãæãã
以äžã«ãã·ã³ãã«ã§å
ç¢ãªé次å®è¡çããšãããŒãžæ°ãåããå Žåã®äžŠåååŸçããããã«ãã¡ã¢ãªå¹çã®è¯ã async iterableïŒé次æ¶è²»ïŒçãã瀺ããŸãã
1) æšå¥šïŒåä»ãïŒãšã©ãŒãã³ããªã³ã°ïŒèªã¿ããã鿬¡ååŸç
- ã·ã³ãã«ã§å®å
šãAPI ãæ¬¡ããŒãžæ
å ±ããè¿ããªãå Žåã«æå¹ã
```ts
type RawUser = {
id: string;
first_name: strâŠ
å¿çæé 22.0ç§åºå 2418 ããŒã¯ã³
SQLã¯ãšãªã®æé©å
以äžã®SQLã¯ãšãªã¯500äžè¡ã®ããŒãã«ã«å¯ŸããŠå®è¡ãããš30ç§ä»¥äžããããŸããæé©åããŠãã ããã
SELECT
p.product_name,
c.category_name,
COUNT(o.order_id) as order_count,
SUM(o.amount) as total_sales,
AVG(r.rating) as avg_rating
FROM products p
LEFT JOINâŠ
GLM 5.3 Flash
# ããã«ããã¯ã®åæ
## 1. æéèŠïŒãã¡ã³ã¢ãŠãã§éèšå€ãå£ããŠãã(æ§èœä»¥åã®ãã°)
`order_details`(泚æçµç±)ãš `reviews` ã**åã¬ãã«ã§** products ã« LEFT JOIN ãããšãäž¡è
ã®çµã¿åããã§è¡ãçŽç©çã«å¢æ®ããŸãã
äŸïŒååAã«æ³šææçް10ä»¶ã»ã¬ãã¥ãŒ3ä»¶ â çµååŸ30è¡
- `SUM(o.amount)` â æ³šæ1ä»¶ãããã¬ãã¥ãŒæ°(3å)ã«æ°Žå¢ã
- `AVG(r.rating)` â æ³šææ°ã§éã¿ä»ããå€ããäžæ£ç¢º
- `COUNT(o.order_id)` â æçŽ°è¡æ°ãæ°ããŠãã
**ã€ã³ããã¯ã¹ã远å ããŠéãããŠããæ°å€ã¯èª€ã£ããŸãŸ**ãªã®ã§ããŸãæ§é ãå€ããå¿
èŠããããŸãã
## 2. WHERE å¥ã LEFT JOIN ãç¡å¹åããŠãã
`o.created_at >= '2024-04-01'` ã WHERE å¥ã«ãããããNULL è¡ãé€å»ãããLEFT JOIN ãå®è³ª INNER JOIN ã«ãªããŸããã売äž0ã®ååã衚瀺ããããæå³ãªããã°ã§ãã
## 3. ã€ã³ããã¯ã¹äžè¶³
`order_details(product_id)`ã`reviews(product_id)` ãªã©ã®çµåããŒã«ã€ã³ããã¯ã¹ããªãããã5Mè¡ã®ããŒãã«ã«æ¯åã·ãŒã±ã³ã·ã£ã«ã¹ãã£ã³+ããã·ã¥çµåãçºçããŸãã
---
# ä¿®æ£çã¯ãšãª(å
ã«éèšããŠããçµå)
```sql
WITH sales AS (
SELECT
od.product_id,
COUNT(DIâŠ
å¿çæé 116.2ç§åºå 5554 ããŒã¯ã³
GPT-5 Mini
èŠç¹ã ãå
ã«çµè«ããŸãšããŸãã
- åé¡ç¹
- çŸç¶ã®ã¯ãšãªã¯ order_details ãš orders ãå±éããåŸã§ WHERE ã« o.created_at ãå
¥ããŠãããã LEFT JOIN ãå®è³ªçã« INNER JOIN ã«ãªãã€ã€ãçµåé åºã§å€§éè¡ãçæããŠããŸãïŒå€éçµåã«ããççºïŒã
- GROUP BY ã« product_nameïŒæååïŒã䜿ã£ãŠããããéçŽããŒã倧ãããå¹çãèœã¡ãã
- éèŠãªçµåã«ã©ã ïŒorder_details.product_idãreviews.product_id çïŒã«ã€ã³ããã¯ã¹ããªãã
- orders.status / orders.created_at ã«ãããã£ã«ã¿ãå¹çåããã€ã³ããã¯ã¹ããªãã
- ïŒæ³šæïŒorders.amount ã order_details çµç±ã§ SUM ãããšã1 泚æã«åäžååãè€æ°è¡ããçã§äºéã«ãŠã³ãããå¯èœæ§ãããïŒã¹ããŒã次第ïŒã
- 察çïŒåªå
床é ïŒ
1. éçŽã¯ãæ³šææ¡ä»¶ã§çµã£ãåŸãã«å
ã«ãŸãšããïŒæŽŸçããŒãã«ïŒCTE ã§ pre-aggregateïŒãããã§å€§ããªçµåãäžåºŠã ãè¡ããproducts åŽã«çµåããè¡æ°ãæ¿æžãããã
2. äž»èŠçµååã«ã€ã³ããã¯ã¹ãäœãïŒ
- order_details(product_id, order_id)
- reviews(product_id)
- orders(status, created_at, order_id, amount) ãŸã㯠orderâŠ
å¿çæé 25.7ç§åºå 3117 ããŒã¯ã³