SQL to SequoiaDB shell to PHP

SequoiaDB 的查询用json（bson）对象表示，下表以例子的形式显示了SQL语句，SequoiaDB shell语句和SequoiaDB PHP驱动程序语法之间的对照关系。

SQL	SequoiaDB shell	PHP Driver
insert into bar(a,b) values(1,-1)	db.foo.bar.insert({a:1,b:-1})	$bar->insert("{a:1,b:-1}")
select a,b from bar	db.foo.bar.find(null,{a:"",b:""})	$bar->find(NULL, '{a:"",b:""}')
select from bar	db.foo.bar.find()	$bar->find()
select from bar where age=20	db.foo.bar.find({age:20})	$bar->find("{age:20}")
select from bar where age=20 order by name	db.foo.bar.find({age:20}).sort({name:1})	$bar->find("{'age':20}", NULL, "{'name':1}")
select from bar where age > 20 and age < 30	db.foo.bar.find({age:{$gt:20,$lt:30}})	$bar->find('{age:{$gt:20,$lt:30}}')
create index testIndex on bar(name)	db.foo.bar.createIndex("testIndex",{name:1},false)	$bar->createIndex("{name:1}", "testIndex", false)
select from bar limit 20 offset 10	db.foo.bar.find().limit(20).skip(10)	$bar->find(NULL, NULL, NULL, NULL, 10, 20)
select count() from bar where age > 20	db.foo.bar.find({age:{$gt:20}}).count()	$bar->count('{age:{$gt:20}}')
update bar set a=a+2 where b=-1	db.foo.bar.update({$inc:{a:2}},{b:-1})	$bar->update('{$inc:{a:2}}', "{b:-1}")
delete from bar where a=1	db.foo.bar.remove({a:1})	$bar->remove("{a:1}")