尝试从数据库中获取两个字段时出现SQLite错误

Question

这是我的数据库代码

public ArrayList<SubCatInfo> getSubCatByCatIdAndtypeName(int id,
            String typeName) {

ArrayList<SubCatInfo> list = new ArrayList<SubCatInfo>();
        Cursor c = this.db.rawQuery("SELECT * FROM " + TB_SUBCAT
                + " WHERE cat_id='" + id + " AND typeName='" + typeName,null);

logcat显示，

01-28 12:28:46.693: ERROR/AndroidRuntime(260): Caused by: android.database.sqlite.SQLiteException: near "1": syntax error: , while compiling: SELECT * FROM tbl_subcategories WHERE cat_id='11 AND typeName='1

Answer 1

这是错误，因为您可能错误地格式化查询。

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Cursor c = this.db.rawQuery("SELECT * FROM " + TB_SUBCAT + " WHERE cat_id='" + id + " AND typeName='" + typeName,null);

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使用下面的代码代替上面的

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Cursor c = this.db.rawQuery("SELECT * FROM " + TB_SUBCAT + " WHERE cat_id=" + id + " AND typeName=" + typeName,null);