在Android数据库下能建多张表吗？

请问在数据库下能建多张表吗？我建了两个表，然后在命令行里查看，结果数据库中只有第一张表，第二张表不存在。。求高人指点！

下面是我的数据库代码：

package com.Login2.db;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteDatabase.CursorFactory;

public class MyHelper extends SQLiteOpenHelper{
    private static final int VERSION=1;
        public MyHelper(Context context, String name, CursorFactory factory,
                        int version) {
                super(context, name, factory, version);
                // TODO Auto-generated constructor stub
        }
        public MyHelper(Context context,String name){
                this(context,name,VERSION);
        }
        public MyHelper(Context context,String name,int version){
                this(context, name,null,version);
        }
        @Override
        public void onCreate(SQLiteDatabase db){
                db.execSQL("create table information(_id int primary key,name varchar,admin varchar,code varchar,power varchar)");
                db.execSQL("create table equipment(_id int primary key,kinds vachar,equip vachar,tempreture vachar,state vachar,on/off vachar)");                
        }
        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
                // TODO Auto-generated method stub
                System.out.println("update a Database");
        }
}

在上面那两个建表语句中，似乎只有第一句执行了，因为第二张表在命令行里查询结果不存在。。。

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