Basic Syntax for all requset

🧠 DynamoDB Request Structure (Core Concept)

DynamoDB API request সবসময় এই structure follow করে:

Client → Operation → Table → Parameters → Response

মানে:

Request = Operation + TableName + Data

1️⃣ AWS CLI — Basic Request Syntax

aws dynamodb <operation> \
    --table-name TableName \
    --other-parameters

Example: Send a request (Get Item)

aws dynamodb get-item \
    --table-name Users \
    --key '{"user_id":{"S":"1"}}' \
    --endpoint-url http://localhost:8000

👉 এখানে request parts:

Part	Meaning
get-item	Operation
Users	Table
key	Request data

Generic CLI Template

aws dynamodb OPERATION \
    --table-name TABLE \
    --parameters

Examples of OPERATION:

put-item
get-item
update-item
delete-item
scan
query

2️⃣ Python boto3 — Basic Request Syntax

Python এ সব request এই pattern follow করে:

import boto3

client = boto3.client("dynamodb")

response = client.operation(
    Parameter1=value,
    Parameter2=value
)

Example: Basic DynamoDB Request

import boto3

client = boto3.client(
    "dynamodb",
    endpoint_url="http://localhost:8000",
    region_name="us-east-1"
)

response = client.get_item(
    TableName="Users",
    Key={
        "user_id": {"S": "1"}
    }
)

print(response)

⭐ boto3 Resource Style (Most Used)

Professional projects usually use resource API:

import boto3

dynamodb = boto3.resource(
    "dynamodb",
    endpoint_url="http://localhost:8000",
    region_name="us-east-1"
)

table = dynamodb.Table("Users")

response = table.get_item(
    Key={"user_id": "1"}
)

print(response)

✅ Cleaner
✅ Pythonic
✅ Recommended

🔥 Universal DynamoDB Request Pattern

CLI

aws dynamodb OPERATION --table-name TABLE --params

Python

table.operation(params)

🚀 Most Important DynamoDB Operations

Operation	Purpose
put_item	insert
get_item	read one
scan	read all
query	filtered read
update_item	update
delete_item	delete

🧠 Senior Engineer Mental Model

Think DynamoDB like this:

HTTP Request → DynamoDB API → Table → Item

You are basically sending JSON request to AWS service.

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