Question

我正在尝试创建两个表，其中一个表的键是另一个表上的键，这样我就可以创建一行到多个表。这是我的oncreate代码。

private static final String MESSAGE_TABLE_CREATE =
        "CREATE TABLE " + MESSAGE_HISTORY + " (" +
                MSG_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
                TASK_ID + " INTEGER, " +
                RECEIVER + " TEXT, " +
                SENDER + " TEXT, " +
                CHAT_MSG + " TEXT, " +
                SHOWUTCDATE + " TEXT, " +
                FLAG + " TEXT, " +
                NEWTIMESTAMP + " TEXT, " +
                LAT + " TEXT, " +
                LON + " TEXT, " +
                IMAGE_URL + " TEXT, " +
                DESTINATION + " TEXT, " +
                ATTACHMENT_ID + " TEXT, " +
                MIME + " TEXT, " +
                SIZE + " TEXT, " +
                EXTENSION + " TEXT, " +
                IS_ACCEPTED + " TEXT, " +
                USER_ID + " TEXT " +
                ")";

private static final String VENDOR_TABLE_CREATE =
        "CREATE TABLE " + VENDORS + " (" +
                VENDOR_ID + " INTEGER PRIMARY KEY, " +
                TASK_ID + "INTEGER, " +
                RECEIVER + " TEXT, " +
                SENDER + " TEXT, " +
                VENDOR_NAME + " TEXT, " +
                VENDOR_CONTENT + " TEXT, " +
                VENDOR_STAR + " TEXT, " +
                VENDOR_ADDRESS + " TEXT, " +
                VENDOR_COMMENTS + " TEXT, " +
                VENDOR_DISTANCE + " TEXT, " +
                MOBILE + " TEXT, " +
                PHONE + " TEXT, " +
                LAT + " TEXT, " +
                LON + " TEXT, " +
                JUDESAYS + " TEXT " +
                ")";


public TasksDBOpenHelper (Context context){
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
}

@Override
public void onCreate(SQLiteDatabase db){
    db.execSQL(CURRENT_TABLE_CREATE);
    db.execSQL(HISTORY_TABLE_CREATE);
    db.execSQL(MESSAGE_TABLE_CREATE);
    db.execSQL(VENDOR_TABLE_CREATE);
}

出于某种原因，在供应商表上列＃34; TASK_ID＆＃34;没有创建。

Answer 1

你错过了TASK_ID＆amp;之间的空格。单词INTEGER。

应为TASK_ID + " INTEGER, " +

Android SQLite，数据库多个表，未创建列

1 个答案: