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sqlite-sql

Write SQLite queries demonstrating patterns for strings, dates, types, and aggregation.

475|25|Updated Mar 31, 2026
Search Tags:#sqlite#sql-patterns#null-handling#string-ops#date-functions#type-coercion#group-concat
One-click install
npx skills add https://github.com/SignalPilot-Labs/SignalPilot --skill sqlite-sql
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: sqlite-sql
Source: https://github.com/SignalPilot-Labs/SignalPilot/tree/main/benchmark/signalpilot-plugin/skills/sqlite-sql
Command: npx skills add https://github.com/SignalPilot-Labs/SignalPilot --skill sqlite-sql

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

SQLite lacks many advanced operators; this guide consolidates essential patterns to write robust, portable SQLite queries for common data tasks.

Core Features & Use Cases

  • Substr and instr usage for string extraction and search
  • Concatenation with || and proper null handling
  • Case-insensitive matching with LIKE (and Unicode considerations)
  • Date handling with date(), datetime(), and strftime()
  • Type coercion with CAST() and related approaches
  • No FULL OUTER JOIN and workarounds; using GROUP_CONCAT for aggregation
  • Runtime type checking with typeof()
  • Null handling with COALESCE/IFNULL, NULLIF
  • Formatted output with printf()
  • Practical use cases across data cleaning, reporting, and transformation in SQLite

Quick Start

Run a couple of sample queries to demonstrate substr, instr, and date-style patterns on your SQLite tables.

Frequently Asked Questions about sqlite-sql

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I handle null values and type coercion in SQLite queries?▼

Concatenate strings with null handling in SQLite using the || operator alongside COALESCE or IFNULL. Use substr and instr for extraction and search, as SQLite lacks many built-in string manipulation alternatives found in other databases.

What's the best way to format dates and concatenate strings in SQLite?▼

Format dates in SQLite using date, datetime, and strftime functions. For string concatenation, use the || operator combined with COALESCE to properly handle nulls, while printf enables formatted output.

How do I perform case-insensitive matching in SQLite without ILIKE?▼

Aggregate data in SQLite using GROUP_CONCAT to concatenate values from multiple rows into a single string. This function serves as a key alternative when working around the lack of FULL OUTER JOIN support for complex data transformations.

Does SQLite support FULL OUTER JOIN for data transformation tasks?▼

SQLite does not support FULL OUTER JOIN. For data transformation tasks, you must implement workarounds using LEFT JOIN combined with UNION, or leverage GROUP_CONCAT for aggregating data across related tables.

How do I aggregate multiple rows into a single string in SQLite?▼

Check data types at runtime in SQLite using the typeof function. This allows you to inspect column storage classes before applying CAST operations, preventing type coercion errors during lightweight ETL tasks.

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