java - 插入数据库

Question

我已经编写了一个查询来将值插入到 Android 中的数据库中：

db.execSQL("CREATE TABLE " + TABLE_NAME + "( " + KEY_SITUATION_NAME
         + " TEXT NOT NULL, " + KEY_CATEGORY_NAME + " TEXT NOT NULL,"
         + KEY_LATTIUDE +" NOT NULL," + KEY_LONGITUDE + " NOT NULL," + " );");

但是，当我执行它时，会引发错误。谁能指出其中的错误？

Answer 1

db.execSQL("CREATE TABLE " + TABLE_NAME + "( " + KEY_SITUATION_NAME
     + " TEXT NOT NULL, " + KEY_CATEGORY_NAME + " TEXT NOT NULL,"
     + KEY_LATTIUDE +" INTEGER NOT NULL," + KEY_LONGITUDE + " INTEGER NOT NULL" + " );");

为 KEY_LATITUDE 和 KEY_LONGITUDE 提供数据类型。

而且你最后保留了一个（，），这是不需要的......

Answer 2

 db.execSQL("CREATE TABLE " + TABLE_NAME + "( " + KEY_SITUATION_NAME
             + " TEXT NOT NULL, " + KEY_CATEGORY_NAME + " TEXT NOT NULL,"
             + KEY_LATTIUDE +" NOT NULL," + KEY_LONGITUDE + " NOT NULL);");

Answer 3

正确的代码是：

db.execSQL("CREATE TABLE " + TABLE_NAME + "( " + KEY_SITUATION_NAME
        + " TEXT NOT NULL, " + KEY_CATEGORY_NAME + " TEXT NOT NULL," + KEY_LATTIUDE +" NOT NULL," + KEY_LONGITUDE + " NOT NULL," + " )");