# SQL

Browse 43 online SQL tools for working with SQL queries and database-related data. Use them in your browser; text inputs are not stored and uploaded files are deleted after 6 hours.

> Canonical page: https://elysiatools.com/en/tags/sql

## Overview

Explore 43 browser-based tools for working with SQL queries, database-related data, and common SQL tasks. No software installation is needed; processing runs on Elysia Tools servers.

## Frequently asked questions

### What can I do with these SQL tools?

These tools help you work with SQL queries and database-related data through browser-based interfaces. Available operations vary by tool.

### Do I need to install software to use an SQL tool?

No. You can use the tools through your browser without installing software. Processing runs on Elysia Tools servers.

### How is SQL data handled?

Text inputs are not stored. Uploaded files are automatically deleted after 6 hours.

## Tools

- [AI RAG Chunk Quality Scorer](https://elysiatools.com/en/tools/ai-rag-chunk-quality-scorer): Score candidate RAG chunk-splitting schemes for a document across four metrics — coherence (clean sentence/paragraph boundaries), coverage (topic focus / key-term concentration), context overlap health, and chunk-size consistency — then compare up to three schemes side by side and recommend the best. Pure offline heuristics, no model calls.
- [API Request Code Snippet Generator](https://elysiatools.com/en/tools/api-request-code-snippet-generator): Generate cURL and common language code snippets from a request URL, method, headers, query parameters, and body
- [CSV Filter](https://elysiatools.com/en/tools/csv-filter): Filter CSV data by column values with multiple conditions and operators. Supports 12 filter operators including equals, contains, greater_than, less_than, and empty value checks. Additional Filters examples: \[{"column": "age", "operator": "greater_than", "value": "25"}\] \[{"column": "status", "operator": "equals", "value": "active"}, {"column": "score", "operator": "greater_equal", "value": "80"}\] \[{"column": "name", "operator": "contains", "value": "john"}, {"column": "email", "operator": "is_not_empty"}\]
- [CSV to Database Migration Planner](https://elysiatools.com/en/tools/csv-to-database-migration-planner): Infer a relational schema from CSV data and generate create-table plus ALTER migration plans for PostgreSQL, MySQL, SQLite, or SQL Server
- [Data Boundary Processor](https://elysiatools.com/en/tools/data-boundary-processor): Advanced boundary value processing tool that identifies and handles minimum/maximum values in numerical data. Perfect for data validation, range checking, statistical analysis, and data preprocessing. Features: - Multiple boundary detection methods (absolute, percentile, standard deviation) - Flexible handling strategies (clip, remove, replace, transform) - Custom range validation - Asymmetric boundary handling - Batch processing capabilities - Comprehensive boundary statistics - Data quality assessment - Visual boundary reports Common Use Cases: - Data validation and quality control - Sensor data range checking - Financial data limit enforcement - Statistical data preprocessing - Machine learning feature engineering - Database constraint validation
- [Data Deduplicator](https://elysiatools.com/en/tools/data-deduplicator): Remove duplicate rows from CSV files based on multiple column combinations. Perfect for cleaning customer lists, survey responses, and database exports. Features: - Multi-column combination deduplication - Fuzzy matching for similar records - Custom deduplication strategies (keep first, last, or most complete record) - Case-insensitive matching option - Whitespace trimming - Detailed duplicate statistics Common Use Cases: - Remove duplicate customer records - Clean email marketing lists - Eliminate redundant survey responses - Prepare data for analysis
- [Foreign Key Validator](https://elysiatools.com/en/tools/data-foreign-key-validator): Validate foreign key relationships between multiple datasets. Perfect for checking data integrity, finding orphaned records, and ensuring referential consistency across related tables. Features: - Validate foreign key relationships - Find orphaned records - Check referential integrity - Support multiple key formats - Cross-table validation - Missing key detection - Duplicate key analysis - Relationship mapping Common Use Cases: - Database integrity checks - Data migration validation - ETL process verification - Referential consistency checks - Data quality assurance - Relationship analysis
- [Database Backup Generator](https://elysiatools.com/en/tools/database-backup-generator): Generate SQL backup scripts for database tables
- [Database Migration Generator](https://elysiatools.com/en/tools/database-migration-generator): Generate SQL migration scripts for database schema changes
- [Database Schema Diff](https://elysiatools.com/en/tools/database-schema-diff): Compare two database schemas and generate migration-oriented change reports
- [DNS Query Tool](https://elysiatools.com/en/tools/dns-query): Query DNS records and domain resolution information including A, AAAA, MX, TXT, NS, and CNAME records
- [Env File Secret Rotation Planner](https://elysiatools.com/en/tools/env-file-secret-rotation-planner): Paste a .env file and get a staged secret-rotation plan. Detects database URLs, API keys, auth tokens, private keys, cloud credentials, payment keys and encryption secrets, scores each by exposure and age, and schedules them across a 4-week rotation timeline with a dual-key checklist and a generated .env.example. Optional last-rotated dates and a configurable cadence (30/90/180/365 days) drive compliance scoring.
- [GraphQL Playground](https://elysiatools.com/en/tools/graphql-playground): An in-browser GraphQL client: write queries and variables, send them to any GraphQL endpoint, and inspect formatted JSON results or error arrays — perfect for iterating on schemas during development
- [GraphQL to JSON Converter](https://elysiatools.com/en/tools/graphql-to-json): Convert GraphQL query or response data to JSON format
- [Header Adder](https://elysiatools.com/en/tools/header-adder): Add headers to CSV data that lacks column names. Perfect for data import from databases, API responses, or numeric datasets that need proper column identification. Features: - Add custom headers to header-less data - Auto-generate intelligent headers - Support for various header naming conventions - Preview headers before applying - Multiple header format options - Support for existing data detection - Batch processing capabilities Common Use Cases: - Fix database exports without headers - Process API response data - Prepare numeric datasets for analysis - Standardize data column naming - Create proper CSV structures - Data format normalization
- [Header Remover](https://elysiatools.com/en/tools/header-remover): Remove headers from CSV data to create clean header-less files. Perfect for database imports, data processing pipelines, API integrations, and systems that require header-less CSV format. Features: - Remove first row (header) from CSV data - Remove multiple header rows - Skip empty lines before removing headers - Preserve data integrity - Support various CSV separators - Preview before removal - Data validation options - Batch processing capabilities Common Use Cases: - Prepare data for database imports - Clean up API response data - Remove metadata from exported files - Create header-less data for machine learning - Prepare data for systems that don't use headers - Extract pure data values from structured files
- [IP Info](https://elysiatools.com/en/tools/ip-info): Get real information about IP addresses including location and ISP details using geolocation database
- [JSON Path Extractor](https://elysiatools.com/en/tools/json-path-extractor): Query JSON with JSONPath or JMESPath-style expressions, inspect matched paths, and highlight extracted values in the original document
- [JSON Pointer Tool](https://elysiatools.com/en/tools/json-pointer): Navigate and extract values from JSON using JSON Pointer (RFC 6901)
- [JSON to GraphQL Converter](https://elysiatools.com/en/tools/json-to-graphql): Convert JSON data to GraphQL query format
- [JSONata Query & Transform Studio](https://elysiatools.com/en/tools/jsonata-query-transform-studio): Preview JSONata-style queries and transformations, compare results across sample payloads, and export the transformed output as JSON, CSV, YAML, or Markdown
- [JSONPath Query Tool](https://elysiatools.com/en/tools/jsonpath-query-tool): Query arbitrary JSON with JSONPath expressions, preview matches, switch output modes, and save reusable query templates
- [JSONPath REPL Playground](https://elysiatools.com/en/tools/jsonpath-repl-playground): An interactive JSONPath REPL that runs multi-step query pipelines against any JSON. Write one JSONPath expression per line (e.g. $..book\[?(@.price<10)\] then $\[0:5\]) and see each step's matches with counts, paths, and values — plus a shareable URL that encodes your data and pipeline. Supports recursive descent ($..), wildcards (\[*\]), filters (\[?(@.price<10)\]), slices (\[0:5:2\]), and negative indices.
- [MAC OUI Vendor Lookup](https://elysiatools.com/en/tools/mac-oui-vendor-lookup): Look up the manufacturer of a MAC address from the IEEE OUI database, or reverse-search a company name to list all its OUI blocks — fully offline

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