Android SQLite，数据库多个表，未创建列

Question

我正在尝试创建两个 table，其中一个 table 的键是另一个 table 的键，这样我就可以将一行变成多行。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 table 上未创建列 "TASK_ID"。

Answer 1

您在 TASK_ID 和单词 INTEGER 之间缺少一个 space。

应该是TASK_ID + " INTEGER, " +

Android SQLite，数据库多个表，未创建列

Android SQLite, database multiple tables, column not being created

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