queryBuilder.js

console.clear();

const fieldsQuery = (fields) => fields
  .map(field => field
      .split(' as ')
      .map(each => each.trim())
      .join(' as ')
  ).join(', ');


const select = (sql) => (...fields) => (
  query({
    ...sql,
    select: `SELECT \n\t ${fieldsQuery(fields)}`
  })
);

const table = (sql) => (table) => (
  query({
    ...sql,
    table: `FROM \n\t ${table}`
  })
)

const where = (sql) => (fields) => {
  return 
}

const build = (sql) => () => {
  return sql
}

const query = (sql = {}) => ({
  select: select(sql),
  table: table(sql),
  build: build(sql)
})


console.log(query().table('TBL_OFERTAS').select('id', 'NAME as name ', 'email').build());