joelmukuthu/sql-bricks

Transparent, Schemaless SQL Generation

SQL Bricks.js

SQL Bricks.js is a transparent, schemaless library for building and composing SQL statements.

• Supports all SQL-92 clauses for select/insert/update/delete with the exception of asc/desc/collate options for orderBy(), see #73 (postgres extensions are at https://github.com/Suor/sql-bricks-postgres, sqlite extensions are at https://github.com/CSNW/sql-bricks-sqlite)
• Over 200 tests
• Easy-to-use, comprehensive docs
• Single straightforward source file (~1,100 lines), easy to understand & debug

Comparison with popular SQL-generation libraries:

library	lines	files	schema	language	other notes
Knex	3500	30	schema	javascript	transactions, migrations, promises, connection pooling
Squel	1000	3	schemaless	coffeescript
node-sql	2600	59	schema	javascript
mongo-sql	1700	49	schemaless	javascript
gesundheit	1600	21	schemaless	coffeescript	uses Any-DB to wrap the DB driver
sql-bricks	1100	1	schemaless	javascript

Related Libraries

• sql-bricks-postgres adds postgres-dialect extensions:
  • LIMIT and OFFSET
  • RETURNING
  • UPDATE ... FROM
  • DELETE ... USING
  • FROM VALUES
• pg-bricks adds:
  • connections
  • transactions
  • query execution
  • data accessors
• sql-bricks-sqlite adds sqlite-dialect extensions:
  • LIMIT and OFFSET
  • OR REPLACE, OR ABORT, OR ROLLBACK, OR FAIL

Use

SQLBricks' only dependency is Underscore.js.

In the browser:

var select = SqlBricks.select;

In node:

var select = require('sql-bricks').select;

A simple select via .toString() and .toParams():

select().from('person').where({last_name: 'Rubble'}).toString();
// "SELECT * FROM person WHERE last_name = 'Rubble'"

select().from('person').where({last_name: 'Rubble'}).toParams();
// {"text": "SELECT * FROM person WHERE last_name = $1", "values": ["Rubble"]}

While toString() is slightly easier, toParams() is recommended because:

• It provides robust protection against SQL injection attacks (toString() just does basic escaping)
• It provides better support for complex data types (objects, arrays, etc, are passed directly to your database driver instead of being "stringified")
• It provides more helpful error messages (see Suor/sql-bricks-postgres#10)

Examples

The SQLBricks API is comprehensive, supporting all of SQL-92 for select/insert/update/delete. It is also quite flexible; in most places arguments can be passed in a variety of ways (arrays, objects, separate arguments, etc). That said, here are some of the most common operations:

// convenience variables (for node; for the browser: "var sql = SqlBricks;")
var sql = require('sql-bricks');
var select = sql.select, insert = sql.insert, update = sql.update;
var or = sql.or, like = sql.like, lt = sql.lt;

// WHERE: (.toString() is optional; JS will call it automatically in most cases)
select().from('person').where({last_name: 'Rubble'}).toString();
// SELECT * FROM person WHERE last_name = 'Rubble'

// JOINs:
select().from('person').join('address').on({'person.addr_id': 'address.id'});
// SELECT * FROM person INNER JOIN address ON person.addr_id = address.id

// Nested WHERE criteria:
select('*').from('person').where(or(like('last_name', 'Flint%'), {'first_name': 'Fred'}));
// SELECT * FROM person WHERE last_name LIKE 'Flint%' OR first_name = 'Fred'

// GROUP BY / HAVING
select('city', 'max(temp_lo)').from('weather')
  .groupBy('city').having(lt('max(temp_lo)', 40))
// SELECT city, max(temp_lo) FROM weather
// GROUP BY city HAVING max(temp_lo) < 40

// INSERT
insert('person', {'first_name': 'Fred', 'last_name': 'Flintstone'});
// INSERT INTO person (first_name, last_name) VALUES ('Fred', 'Flintstone')

// UPDATE
update('person', {'first_name': 'Fred', 'last_name': 'Flintstone'});
// UPDATE person SET first_name = 'Fred', last_name = 'Flintstone'


// Parameterized SQL
update('person', {'first_name': 'Fred'}).where({'last_name': 'Flintstone'}).toParams();
// {"text": "UPDATE person SET first_name = $1 WHERE last_name = $2", "values": ["Fred", "Flintstone"]}

// SQLite-style params
update('person', {'first_name': 'Fred'}).where({'last_name': 'Flintstone'}).toParams({placeholder: '?%d'});
// {"text": "UPDATE person SET first_name = ?1 WHERE last_name = ?2", "values": ["Fred", "Flintstone"]}

// MySQL-style params
update('person', {'first_name': 'Fred'}).where({'last_name': 'Flintstone'}).toParams({placeholder: '?'});
// {"text": "UPDATE person SET first_name = ? WHERE last_name = ?", "values": ["Fred", "Flintstone"]}

Documentation: http://csnw.github.io/sql-bricks

License: MIT