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我正在尝试在数据库中创建多个表，但第一个表仅创建成功，另外两个给我错误我想知道如何确保创建表 

04-18 17:20:45.343: E/AndroidRuntime(956): android.database.sqlite.SQLiteException: no such table: squares: , while compiling: SELECT _squareid, squarename, squarelatitude, squarelongitude FROM squares

这是我的代码

public class Dbinfo {

    public static final String KEY_RAWID = "_id";
    public static final String KEY_RAWNAME = "name";
    public static final String KEY_PASSWORD = "password";
    public static final String KEY_EMAIL = "email";
    public static final String KEY_SQUAREID = "_squareid";
    public static final String KEY_SQUARENAME = "squarename";
    public static final String KEY_SQUARELATITUDE = "squarelatitude";
    public static final String KEY_SQUARELONGITUDE = "squarelongitude";
    private static final String KEY_STREETID = "streetid";
    private static final String KEY_STREETNAME = "streetname";
    private static final String KEY_STREETLATITUDE="streetlatitude";
    private static final String KEY_STREETLONGTIUDE="streetlongtiude";
    private static final String KEY_STREETCAPACITY = "streetcapacity";
    private static final String KEY_STREETFOREIGN = "streetforegin";

    private static final String DATABASE_NAME = "users_DB";
    private static final String DATABASE_TABLE = "users";
    private static final String DATABASE_TABLESQUARES = "squares";
    private static final String DATABASE_TABLE_STREETS = "streets";
    private static final int DATABASE_VERSION = 1;

    private dbusers ourhelper;
    private final Context ourcontext;
    private static SQLiteDatabase ourDatabase;

    private static class dbusers extends SQLiteOpenHelper {

        public dbusers(Context context) {
            super(context, DATABASE_TABLE, null, DATABASE_VERSION);
            // TODO Auto-generated constructor stub
        }

        @Override
        public void onCreate(SQLiteDatabase db) {
            // TODO Auto-generated method stub

            db.execSQL("CREATE TABLE " + DATABASE_TABLE + "(" + KEY_RAWID
                    + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_RAWNAME
                    + " TEXT NOT NULL, " + KEY_PASSWORD + " TEXT NOT NULL, "
                    + KEY_EMAIL + " TEXT NOT NULL);");

            db.execSQL("CREATE TABLE " + DATABASE_TABLESQUARES + "("
                    + KEY_SQUAREID + "INTEGER PRIMARY KEY AUTOINCREMENT, "
                    + KEY_SQUARENAME + "TEXT NOT NULL, " + KEY_SQUARELATITUDE
                    + "TEXT NOT NULL, " + KEY_SQUARELONGITUDE
                    + "TEXT NOT NULL);");

            final String STREET = "CREATE TABLE " + DATABASE_TABLE_STREETS
                    + " (" + KEY_STREETID
                    + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_STREETNAME+
                    " TEXT NOT NULL"+KEY_STREETLATITUDE+"TEXT NOT NULL"+KEY_SQUARELONGITUDE
                    + " TEXT NOT NULL, " + KEY_STREETCAPACITY
                    + " text not null, FOREIGN KEY (" + KEY_STREETFOREIGN
                    + ") REFERENCES " + DATABASE_TABLESQUARES + " ("
                    + KEY_SQUAREID + "));";
            db.execSQL(STREET);

有什么帮助吗？？

4

2 回答 2

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首先使用 SQLite 浏览器检查您的数据库。
如果没有找到表，那么您在创建表时遇到问题。请检查以下代码以创建
表。 

private static final String DATABASE_CREATE3 = "create table IF NOT EXISTS "
        + TABLE_EXAM + "( " + COLUMN_EXAM_ID
        + " integer primary key autoincrement, " 
        + COLUMN_SUBCHAWISE + " text not null, "
        + COLUMN_EXAM_TYPE + " text not null, "
        + COLUMN_EXAM_DETAILS + " text not null, "
        + COLUMN_MARKS + " number not null);";
于 2012-04-18T15:52:43.280 回答
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在您的sql创建中的列名之后放置一些空格String（对于 table DATABASE_TABLESQUARES）：

db.execSQL("CREATE TABLE " + DATABASE_TABLESQUARES + "("
                    + KEY_SQUAREID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
                    + KEY_SQUARENAME + " TEXT NOT NULL, " + KEY_SQUARELATITUDE
                    + " TEXT NOT NULL, " + KEY_SQUARELONGITUDE
                    + " TEXT NOT NULL);");

进行上述修改后，您必须卸载应用程序并重新运行它，以便再次调用 的onCreate方法SQLiteOpenHelper以根据新的 sql 初始化数据库String。String此外，正如 Sam 的评论，还要修改表的 sql 创建DATABASE_TABLE_STREETS并在列声明之间添加一些逗号（就像您之前对其他两个表所做的那样），否则当您尝试访问该表时会再次遇到麻烦。

于 2012-04-18T15:39:44.340 回答