sql.js is a port of SQLite to Webassembly, by compiling the SQLite C code with Emscripten. It uses a virtual database file stored in memory, and thus doesn't persist the changes made to the database.
AlaSQL.js a JavaScript SQL database that handles both traditional relational tables and nested JSON data (NoSQL).
You can export, store, and import data from localStorage, IndexedDB, or Excel.
Sqorn is a Javascript library for building SQL queries.
Features
QueryBuilder can be used on advanced search engine pages, administration backends, etc. to build complex queries or filters. It is highly customisable and can be used with many jQuery widgets like autocompleters and sliders.
It outputs a structured JSON of rules which can be easily parsed to create SQL/NoSQL/whatever queries. It can also directly create a SQL WHERE statement.
