TaylorDB Basic Queries & Filtering

This document covers core read operations using the TaylorDB query builder:

Basic select queries
Ordering
Filtering with where clauses
Date filters
Array and select field filters
Simple text search

Basic Queries

Get All Records

export async function getAllUsers() {
  return await queryBuilder
    .selectFrom("users")
    .select(["id", "name", "email", "createdAt"])
    .execute();
}

Get All Records (All Fields)

export async function getAllUsers() {
  return await queryBuilder.selectFrom("users").execute();
}

Get Single Record by ID

export async function getUserById(id: number) {
  return await queryBuilder
    .selectFrom("users")
    .where("id", "=", id)
    .executeTakeFirst();
}

Note: .executeTakeFirst() returns a single record or undefined.

Get Records with Ordering

// Descending order (newest first)
export async function getRecentUsers() {
  return await queryBuilder
    .selectFrom("users")
    .orderBy("createdAt", "desc")
    .execute();
}

// Ascending order (oldest first)
export async function getOldestUsers() {
  return await queryBuilder
    .selectFrom("users")
    .orderBy("createdAt", "asc")
    .execute();
}

Filtering & Conditions

Basic Where Clauses

// Exact match
.where("status", "=", "active")

// Not equal
.where("status", "!=", "deleted")

// Greater than / Less than
.where("age", ">", 18)
.where("age", ">=", 18)
.where("age", "<", 65)
.where("age", "<=", 65)

Multiple Conditions (AND logic)

export async function getActiveAdults() {
  return await queryBuilder
    .selectFrom("users")
    .where("status", "=", "active")
    .where("age", ">=", 18)
    .execute();
}

Date Filtering

// Exact date
export async function getUsersForDate(date: string) {
  return await queryBuilder
    .selectFrom("users")
    .where("createdAt", "=", ["exactDay", date])
    .execute();
}

// Date range
export async function getUsersInRange(startDate: string, endDate: string) {
  return await queryBuilder
    .selectFrom("users")
    .where("createdAt", ">=", ["exactDay", startDate])
    .where("createdAt", "<=", ["exactDay", endDate])
    .execute();
}

// Before/After a date
.where("dueDate", "<", ["exactDay", "2024-01-01"])
.where("startDate", ">", ["exactDay", "2024-12-31"])

Array/Multi-Select Filtering

// Check if array contains any of the values
export async function getUsersByTags(tags: string[]) {
  return await queryBuilder
    .selectFrom("users")
    .where("tags", "hasAnyOf", tags)
    .execute();
}

// Example: Get users tagged with "admin" OR "moderator"
const adminUsers = await getUsersByTags(["admin", "moderator"]);

Select Field Filtering

Single Select

For single-select fields, the query builder now returns a single string value.

export async function getUsersByRole(role: string) {
  return await queryBuilder
    .selectFrom("users")
    .where("role", "=", role)
    .execute();
}

Multi Select

For multi-select fields, the query builder returns and accepts multiple values.

export async function getUsersByInterests(interests: string[]) {
  return await queryBuilder
    .selectFrom("users")
    .where("interests", "hasAnyOf", interests)
    .execute();
}

Text Search (Contains)

export async function searchUsersByName(query: string) {
  return await queryBuilder
    .selectFrom("users")
    .where("name", "contains", query)
    .execute();
}

For more topics, see:

TAYLORDB_WRITE_OPERATIONS.md for inserts, updates, and deletes
TAYLORDB_ADVANCED_PATTERNS.md for aggregations, pagination, and conditional queries
TAYLORDB_FIELD_TYPES.md for field type handling and enums
TAYLORDB_PITFALLS_BEST_PRACTICES.md for pitfalls and best practices

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