android.database.sqlite.SQLiteException：近 「答案」：語法錯誤（代碼1）：在編譯：SELECT * FROM聯繫人那裏ANS答案

Question

我面對的錯誤是

android.database .sqlite.SQLiteException：接近「答案」：語法錯誤 （代碼1），編譯時：SELECT * from聯繫人答案。

public Cursor getData() { 
     SQLiteDatabase db = this.getReadableDatabase(); 
     Cursor res = db.rawQuery("SELECT * from contacts where ans " + CONTACTS_COLUMN_ANS, null); 
     return res; 

Answer 1

如果你的功能是正確的，然後整頓查詢。缺少設置=的標誌。

您可以

Cursor res = db.rawQuery("SELECT * FROM "+ contacts + " WHERE " + ans + " = '"+ CONTACTS_COLUMN_ANS +"'" , null); 

Answer 2

試試這個，

public Cursor getData() 
    { 
    SQLiteDatabase db = this.getReadableDatabase(); 
    Cursor res = db.rawQuery("SELECT * FROM "+ contacts + " WHERE " + ans + " = '"+ CONTACTS_COLUMN_ANS +"'" , null); 
    return res; 
    } 

Answer 3

更新與此

public Cursor getData() { 
    SQLiteDatabase db = this.getReadableDatabase(); 
    Cursor res = db.rawQuery("SELECT * from contacts where ans='" +CONTACTS_COLUMN_ANS + "'", null); 
    return res; 
} 

Answer 4

您的代碼，你可以使用像..

String[] params = new String[]{ contact_no }; 
Cursor c = db.rawQuery("SELECT * FROM contacts WHERE ans = ?", 
        params);