SequoiaDB 巨杉数据库的查询用 json（bson）对象表示，下表以示例的形式展示 SQL 语句、SDB Shell 语句和 SequoiaDB PHP 驱动程序语法之间的对照关系。
| SQL | SDB Shell | PHP Driver |
|---|---|---|
| insert into employee(a,b) values(1,-1) | db.sample.employee.insert({a:1,b:-1}) | $employee->insert("{a:1,b:-1}") |
| select a,b from employee | db.sample.employee.find(null,{a:"",b:""}) | $employee->find(NULL, '{a:"",b:""}') |
| select * from employee | db.sample.employee.find() | $employee->find() |
| select * from employee where age=20 | db.sample.employee.find({age:20}) | $employee->find("{age:20}") |
| select * from employee where age=20 order by name | db.sample.employee.find({age:20}).sort({name:1}) | $employee->find("{'age':20}", NULL, "{'name':1}") |
| select * from employee where age > 20 and age < 30 | db.sample.employee.find({age:{$gt:20,$lt:30}}) | $employee->find('{age:{$gt:20,$lt:30}}') |
| create index testIndex on employee(name) | db.sample.employee.createIndex("testIndex",{name:1},false) | $employee->createIndex("{name:1}", "testIndex", false) |
| select * from employee limit 20 offset 10 | db.sample.employee.find().limit(20).skip(10) | $employee->find(NULL, NULL, NULL, NULL, 10, 20) |
| select count(*) from employee where age > 20 | db.sample.employee.find({age:{$gt:20}}).count() | $employee->count('{age:{$gt:20}}') |
| update employee set a=a+2 where b=-1 | db.sample.employee.update({$inc:{a:2}},{b:-1}) | $employee->update('{$inc:{a:2}}', "{b:-1}") |
| delete from employee where a=1 | db.sample.employee.remove({a:1}) | $employee->remove("{a:1}") |
