Question

我在sqlite数据库中有一个列，以这种格式存储日期和时间（YYYY-MM-DD HH：MM）。当我尝试将此列与另一个日期和时间值进行比较时，我的应用程序崩溃了。我猜它是因为（HH：MM）中存在冒号。我该如何进行比较？

查询：

public Cursor fetchrDatetime(String dati) throws SQLException {

       String query = "SELECT * FROM reminders WHERE reminder_date_time=" + dati;
       Cursor cursor = mDb.rawQuery(query, null);

       return cursor;
   }

logcat的：

android.database.sqlite.SQLiteException: near "16": syntax error (code 1): , while compiling: SELECT * FROM reminders WHERE reminder_date_time=2015-01-09 16:14
           at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
           at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:882)
           at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:493)
           at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
           at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
           at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
           at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
           at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314)
           at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1253)
           at apps.rwx.doctorremainder.RemindersDbAdapter.fetchrDatetime(RemindersDbAdapter.java:248)
           at apps.rwx.doctorremainder.ReminderEditActivity.saveState(ReminderEditActivity.java:306)
           at apps.rwx.doctorremainder.ReminderEditActivity.access$300(ReminderEditActivity.java:40)
           at apps.rwx.doctorremainder.ReminderEditActivity$5.onClick(ReminderEditActivity.java:203)
           at android.view.View.performClick(View.java:4091)
           at android.view.View$PerformClick.run(View.java:17072)
           at android.os.Handler.handleCallback(Handler.java:615)
           at android.os.Handler.dispatchMessage(Handler.java:92)
           at android.os.Looper.loop(Looper.java:153)
           at android.app.ActivityThread.main(ActivityThread.java:4987)
           at java.lang.reflect.Method.invokeNative(Native Method)
           at java.lang.reflect.Method.invoke(Method.java:511)
           at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
           at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
           at dalvik.system.NativeStart.main(Native Method)

Answer 1

WHERE的值应介于'之间。

String query = "SELECT * FROM reminders WHERE reminder_date_time='" + dati + "'";

如何比较存储为文本的sqlite中的日期和时间？

1 个答案: