explaingit

ghost9887/datasea

Analysis updated 2026-05-18

1C++Audience · developerComplexity · 2/5LicenseSetup · moderate

TLDR

A command-line tool with its own simple language for generating realistic fake SQL test data with random values and formatting rules.

Mindmap

mindmap
  root((datasea))
    What it does
      Generates SQL data
      Fake test records
      Custom column rules
    Language Features
      Variables
      String formatting
      Random generators
      Increment IDs
    Data Types
      Names and locales
      Integers and doubles
      Booleans
      Dates
    Setup
      CMake build
      CLI command
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filefunction / class

What do people build with it?

USE CASE 1

Populate a test database with hundreds of realistic fake user records including names, emails, and ages.

USE CASE 2

Generate SQL INSERT statements with auto-incrementing IDs and formatted composite fields like usernames.

USE CASE 3

Create weighted or range-bounded random data for load testing a database schema before production.

USE CASE 4

Script repeatable test data generation so your development team always starts with the same dataset.

What is it built with?

C++CMake

How does it compare?

ghost9887/dataseabenagastov/bindweb-nim-wasm-compilerdavid19p/custom-llm-kernel-2080
Stars111
LanguageC++C++C++
Setup difficultymoderateeasyhard
Complexity2/55/55/5
Audiencedeveloperdeveloperresearcher

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · moderate Time to first run · 30min

Requires CMake and a C++ compiler to build from source before use.

MIT license: use, modify, and distribute freely for any purpose, including commercial use, as long as you keep the copyright notice.

In plain English

This is a command-line tool that helps developers generate fake SQL data for testing databases. Instead of writing custom scripts or using online tools, you write a small file in Datasea's own simple language, run the command, and it produces SQL INSERT statements filled with realistic-looking fake values. The language is designed to be easy to read and write. A typical Datasea file defines a table name, the number of rows to generate, and a list of columns, each with a rule for what value to put in it. You can use built-in generators for common types like first names, last names, and city names, or combine them with string formatting to produce composite values such as email addresses or usernames. The tool also supports random integers, random decimal numbers, random booleans, and incrementing IDs, all with optional range limits. Beyond random values, the language has basic programming features: you can declare variables, reuse them in multiple columns, call string methods like substring and character access, and format values with padding or decimal truncation. This makes it possible to express realistic relationships between columns. For example, you can build a username from a generated first name plus a random number without writing any separate code. Installation requires building the tool from source using CMake, which is a standard approach for C++ projects. Once built, it installs as a system command called datasea and takes a file path as input. The tool is MIT-licensed, meaning it can be used freely for any purpose including commercial projects. The README is mostly an annotated example that walks through most of the language's features in a single sample table definition. The project is small and focused, aimed at developers who need predictable but flexible control over their test data generation without reaching for a heavier tool.

Copy-paste prompts

Prompt 1
Write a Datasea script that generates 50 rows for an orders table with columns: id (increment), customer_name (full name), amount (random double 1.00..999.99), and status (random from a fixed list of strings).
Prompt 2
I built Datasea from source with CMake. Now I want to generate data for a users table with email and username columns derived from the same first name. Show me how to reuse a variable across multiple columns.
Prompt 3
Explain how Datasea's format() function works, including padding and decimal truncation, with examples I can paste directly into a .datasea file.
Prompt 4
How do I set the locale in Datasea to use US-style fake names and city names, and what locale options are available?

Frequently asked questions

What is datasea?

A command-line tool with its own simple language for generating realistic fake SQL test data with random values and formatting rules.

What language is datasea written in?

Mainly C++. The stack also includes C++, CMake.

What license does datasea use?

MIT license: use, modify, and distribute freely for any purpose, including commercial use, as long as you keep the copyright notice.

How hard is datasea to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is datasea for?

Mainly developer.

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