スギデータベースSequoiaDBの一般的な操作

          。      nosql           ，        sql         。     sql     ，     ：
1.      ，   as    ， select a._id as id from xx.xx as a，  as    。
2.       ，          。
3.       
 ：db.exec("select a.* from scott.person as a")  --a.*  
    db.exec("select a.name,a.age from scott.person as a,scott.personNameAge as b where a.name=b.name")   --  a,b  
4.        。

--             
root@iZwz91f71l9kck30hh2hkoZ:~# sdb
> db = new Sdb('localhost',11810) --    
> db.createCS("scott")  --      
> db.scott.createCL("person")  --    

> db.help()   --  
> db.scott.help()  
> db.scott.person.help()  

-- 
> db.scott.person.insert({name:"hadoop",age:10})
> db.scott.person.insert({name:"spark",age:5})
> db.execUpdate("insert into scott.person (name,value) values ('sdb',3)")    --sql  


-- 
> db.scott.person.find()
> db.scott.person.find({},{name:1})  --select name from xx.xx
> db.scott.person.find({name:"hadoop"},{name:1})   --select name from xx.xx where name='hadoop'
> db.exec("select * from scott.person")     --sql  


-- 
> db.scott.person.update({$set:{age:11}},{name:"hadoop"})  --update xx.xx set age=11 where name='hadoop'
> db.scott.person.update({$unset:{age:""}},{name:"hadoop"})  --   name='hadoop'   ， drop age  
> db.execUpdate("update scott.person set age=11 where name='hadoop'")  --sql  

-- 
> db.scott.person.remove({name:"hadoop"})  --delete from table xx.xx where name='hadoop'
> db.scott.person.remove()    --delete from table xx.xx
> db.scott.person.truncate()    --truncate table xx.xx
> db.dropCL("person")   --drop table xx
> db.execUpdate("delete from scott.person where name='hadoop'")   --sql  


--drop  
> db.scott.person.update({$unset:{age:""}})    --alter table scott.person drop column age;
Takes 0.1191s.

--insert...select
db.execUpdate("insert into scott.person select * from scott.personNameAge")   --      ，objectid    
db.execUpdate("insert into scott.person select id,name from scott.personNameScore")  --      

--insert（for  ）
for(var i=0; i<=7; i++) db.scott.rq.insert({rq:i})
for(var i=1; i<=100; i++) db.scott.test.insert({id:i,name:"name"+i,rq:i%7})

--limit n offset m     m  ， n   
> db.exec("select bsfwtmc from scott.t_yjd order by _id limit 3 offset 3")
{
  "bsfwtmc": "             "
}
{
  "bsfwtmc": "           "
}
{
  "bsfwtmc": "          "
}
Return 3 row(s).


--  _id   
db.scott.t_bsfwt.find({_id:{"$oid":"589bcbf01a7edd1f1b000000"}})

> db.exec("select max(_id) as id from scott.t_bsfwt")
{
  "id": {
    "$oid": "589bcbf01a7edd1f1b00020d"
  }
}
Return 1 row(s).
Takes 0.9621s.
> db.exec("select min(_id) as id from scott.t_bsfwt")
{
  "id": {
    "$oid": "589bcbf01a7edd1f1b000000"
  }
}

--exists null   
     bar       age    
> db.foo.bar.find({age:{$exists:1}})
     bar       content     name      
> db.foo.bar.find({"content.name":{$exists:0}})


--like  ，     Regex  0 9     
db.exec("select gzzkb from scott.t_bsfwt  where gzzkb like '^[0-9]' ")
db.scott.t_bsfwt.find({bsfwt_dm:{$regex:'24419.*',$options:'i'}})
> db.scott.person.find({name:Regex("b","i")})         --like '%b%'
> db.scott.person.find({name:Regex("^.bc$","i")})     --like '_bc%'
> db.scott.person.find({name:Regex("^.bb$","i")})     --like '_bb%'

--    
import org.bson.BasicBSONObject;
import com.sequoiadb.base.CollectionSpace;
import com.sequoiadb.base.DBCollection;
import com.sequoiadb.base.DBCursor;
import com.sequoiadb.base.Sequoiadb;

public class TestSdb_page{
        public static void main(String[] args) {
                String connString="iZ94ps2ghdsZ:11810";
                String username="";
                String password="";
                Sequoiadb db = new Sequoiadb(connString, username, password);
               
                CollectionSpace scott = db.getCollectionSpace("scott");
                DBCollection cl = scott.getCollection("cl");
                //cl.query(matcher, selector, orderBy, hint, skipRows, returnRows)
                cl.query("", "", "", "", 0, 20)
               
        }
}