sqlkit

sqlkit

sqlkit is a zero-dependency lightweight and expressive SQL query builder and repository layer for TypeScript with PostgreSQL support.

🔧 Installation

npm install sqlkit

API Documentation

🚀 Usage Examples

Define Your Domain Model

interface User {
  id: string;
  name: string;
  email: string;
  age?: number;
}

1. Query Builder (Build Mode)

import { SelectQueryBuilder } from "sqlkit";

const builder = new SelectQueryBuilder<User>("users");

const { sql, values } = builder
  .select(["id", "name"])
  .where({ key: "age", operator: ">", value: 18 })
  // OR .where(eq("age", 18))
  .build();

console.log(sql);
// SELECT "users"."id","users"."name" FROM "users" WHERE "users"."age" > $1
console.log(values); // [18]

2. Query Execution (Commit Mode)

import { PostgresAdapter, SelectQueryBuilder } from "sqlkit";
import { Pool } from "pg";

const pool = new Pool({
  /* your config */
});
const executor = new PostgresAdapter(pool);

const builder = new SelectQueryBuilder<User>("users", executor);

const users = await builder
  .select(["id", "name"])
  .where({ key: "age", operator: ">", value: 18 })
  // OR .where(eq("age", 18))
  .commit();

console.log(users);
// => [{ id: "1", name: "John Doe" }, ...]

3. Repository API 🔥

import { Repository, gt, like, and } from "sqlkit";
import { PostgresAdapter } from "sqlkit";
import { Pool } from "pg";

const pool = new Pool({
  /* your config */
});
const executor = new PostgresAdapter(pool);
const userRepo = new Repository<User>("users", executor);

// Find many
const users = await userRepo.find({
  where: and(gt("age", 25), like("name", "%Doe%")),
});

// Paginate
const result = await userRepo.paginate({
  page: 1,
  limit: 10,
  offset: 2,
  where: gt("age", 18),
  columns: ["age", "email"],
  orderBy: [asc("age")],
});

console.log(result.nodes); // array of users
console.log(result.meta);
/*
{
  totalCount: 100,
  currentPage: 2,
  totalPages: 10,
  hasNextPage: true
}
*/

// Find one
const user = await userRepo.find(like("email", "[e-mail]"));

// Count
const count = await userRepo.count(gt("age", 30));

// Insert
const newUser = await userRepo.insert({
  name: "Rayhan",
  email: "[e-mail]",
});

// Update
const updated = await userRepo.update(
  { name: "Ray" },
  like("email", "%ray%"),
);

// Delete
const deleted = await userRepo.delete(like("name", "Ray%"));

🔍 Supported Operators

Comparison

• eq("field", value) – Equal (=)
• neq("field", value) – Not Equal (!=)
• gt("field", value) – Greater Than (>)
• gte("field", value) – Greater Than or Equal (>=)
• lt("field", value) – Less Than (<)
• lte("field", value) – Less Than or Equal (<=)
• between("field", min, max) – BETWEEN
• like("field", pattern) – LIKE
• ilike("field", pattern) – ILIKE (case-insensitive)
• regexp("field", pattern) – REGEXP
• iregexp("field", pattern) – Case-insensitive REGEXP
• inArray("field", [a, b, c]) – IN
• notInArray("field", [a, b]) – NOT IN
• isNull("field") – IS NULL
• isNotNull("field") – IS NOT NULL

Logical

• and(...conditions)
• or(...conditions)
• not(condition)
• xor(condA, condB) [⚠️ -- Not tested properly]

Sorting

• asc("field")
• desc("field")
• nullsFirst("field")
• nullsLast("field")