Android SQLite简单语法错误

我决定为我的应用程序添加第二个表。我一直收到一个语法错误，尽管它的设置与第一个表创建字符串几乎完全相同

private static final String BUDGET_TABLE = "budgets";
private static final String KEY_ROW_ID_BUDGET = "_id";
private static final String KEY_BUDGET_LIMIT = "limit";
private static final String KEY_BUDGET_CURRENT_AMOUNT = "current_amount";

此字符串在“limit”附近抛出语法错误

private static final String BUDGET_CREATE =
        "create table "+ BUDGET_TABLE +" ( "+ KEY_ROW_ID_BUDGET+" integer primary key autoincrement, "
        + KEY_BUDGET_LIMIT+" text not null, "+ KEY_BUDGET_CURRENT_AMOUNT+" text);";


db.execSQL(BUDGET_CREATE);

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很简单，您可以/不应该在创建表时使用关键字。您正在使用

limit

作为列，这是无效的，因此它会给您带来运行时错误，我建议您将其更改为类似下面这样的

budget\u limit

，然后重试

private static final String BUDGET_TABLE = "budgets";
private static final String KEY_ROW_ID_BUDGET = "_id";
private static final String KEY_BUDGET_LIMIT = "budget_limit";
private static final String KEY_BUDGET_CURRENT_AMOUNT = "current_amount";

private static final String BUDGET_CREATE =
        "create table "+ BUDGET_TABLE +" ( "+ KEY_ROW_ID_BUDGET+" integer primary key autoincrement, "
        + KEY_BUDGET_LIMIT+" text not null, "+ KEY_BUDGET_CURRENT_AMOUNT+" text);";


db.execSQL(BUDGET_CREATE);

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作为预先警告，请尝试使用limit以外的其他列名，因为“limit”实际上是一个限制返回行数的sql命令。