데이터 중심 애플리케이션이 뭘까?

CREATE TABLE User (
	id BIGINT NOT NULL PRIMARY KEY,
	name VARCHAR(255) NOT NULL,
	age INT NOT NULL
);

ALTER TABLE User
MODIFY COLUMN age VARCHAR(255);

ALTER TABLE User ADD COLUMN first_name TEXT;
UPDATE users SET first_name = split_part(name, '', 1);

SELECT * FROM animals WHERE family = 'Sharks';

{
  "user_id": 251,
  "first_name": "Bill",
  "last_name": "Gates",
  "summary": "Co-chair of the Bill & Melinda Gates...Active blogger.",
  "region_id": "us:91",
  "industry_id": 131,
  "positions": [
    { "job_title": "Co-chair", "organization": "Bill Foundation" },
    { "job_title": "Co-founder, Chairman", "organization": "Microsoft" }
  ],
  "education": [
    { "school_name": "Harvard University", "start": 1973 },
    { "school_name": "Lakeside School", "start": null }
  ]
}

function getSharks() {
  let sharks = [];
  for (let i = 0; i < animals.length; i++) {
    if (animals[i].family === "Sharks") {
      sharks.push(animals[i]);
    }
  }
  return shaks;
}

li.selectd > p {
  background-color: blue;
}

{
  "users": [
    {
      "id": "254",
      "school": "Bill"
    },
    {
      "id": "255",
      "school": "Bill"
    },
    {
      "id": "256",
      "school": "Bill"
    }
  ]
}

{
  "school_id": 24,
  "name": "Bill",
  "location": "NoWhere"
}

const schoolName = users.find((data) => data.id === id).school;
const schoolLocation = school.find((info) => info.name === schoolName).location;