正常運行,我有這樣的SQLITE3查詢未在Android
SELECT value1 FROM mytable where (value1 > value2) AND category = 1 ;
此查詢不能在Android的正確執行。雖然如果我手動去
/data/data/packagename/databases/mydatabase.db
這裏是代碼
try {
SQLiteDatabase sqdb = _context.openOrCreateDatabase(_DB_NAME, 0,
null);
String sql = null;
sql = "SELECT value1 FROM mytable where (value1 > value2) AND category = " + category
+"; ";
Cursor c = sqdb.rawQuery(sql, null);
Log.i("sql = ", sql);
if (c.moveToFirst()) {
while (!c.isAfterLast()) {
categoryValue = c.getString(0);
c.moveToNext();
}
}
Log.i("categoryValue", categoryValue);
sqdb.close();
c.close();
} catch (Exception e) {
e.printStackTrace();
}
然後執行它。然後它完美地工作。
發生了什麼事?
它是如何表現?什麼是錯誤?說點什麼? – 2012-03-16 10:54:55
如果條件爲真,它不會檢索到value1的值..... – 2012-03-16 10:58:19
向我們展示如何在代碼中執行? – waqaslam 2012-03-16 10:58:20