Android Studio - 错误代码：1（SQLITE_ERROR）原因：SQL（查询）错误缺少数据库

Question

有以下错误信息：

操作失败：表 Medicine 没有名为 amount(code1): 的列，编译时：INSERT INTO drug(name,amount,type,info,registration_no)VALUES(?,?,?,?,?)

配置文件：

public class Config {
    public static final String COLUMN_MEDICINE_ID = "_id";
    public static final String COLUMN_MEDICINE_NAME = "name";
    public static final String COLUMN_MEDICINE_PRODUCT = "registration_no";
    public static final String COLUMN_MEDICINE_INFO = "info";
    public static final String COLUMN_MEDICINE_TYPE = "type";
    public static final String COLUMN_MEDICINE_AMOUNT = "amount";
}

帮助文件：

@Override
public void onCreate(SQLiteDatabase db) {


    String CREATE_MEDICINE_TABLE = "CREATE TABLE " + Config.TABLE_MEDICINE + "("
            + Config.COLUMN_MEDICINE_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
            + Config.COLUMN_MEDICINE_NAME + " TEXT NOT NULL, "
            + Config.COLUMN_MEDICINE_PRODUCT + " INTEGER NOT NULL UNIQUE, "
            + Config.COLUMN_MEDICINE_INFO + " TEXT, " //nullable
            + Config.COLUMN_MEDICINE_TYPE + " TEXT " //nullable
            + Config.COLUMN_MEDICINE_AMOUNT + " INTEGER UNIQUE, "
            + ")";

    Logger.d("Table create SQL: " + CREATE_MEDICINE_TABLE);
    db.execSQL(CREATE_MEDICINE_TABLE);
    Logger.d("DB created!");
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    db.execSQL("DROP TABLE IF EXISTS " + Config.TABLE_MEDICINE);
    onCreate(db);
}

Answer 1

您在创建 SQL 中忘记了类型和金额列之间的逗号。此外，金额列 def 后面还有一个杂散的逗号：

+ Config.COLUMN_MEDICINE_TYPE + " TEXT " //nullable
+ Config.COLUMN_MEDICINE_AMOUNT + " INTEGER UNIQUE, "
+ ")";

在那里修复 SQL 后，您可以卸载您的应用一次以重新触发 onCreate()。