Question

我是使用SQLite的新手，因此构建select查询就是我认为的问题。

无论如何，我正在尝试准备一份声明，它将根据当天的情况（在MainActivity中确定）给出模块名称，模块演讲时间和模块研讨会时间

以下是返回列表的方法的 getModuleTime

public List<tableModules> getModuleTime(String module1, String module2, String module3, String day) {
    List<tableModules> moduleList = new ArrayList<tableModules>();
    // Select All Query     
    SQLiteDatabase db = this.getWritableDatabase();
    Cursor cursor = db.rawQuery("SELECT modulename, modulelecturetime, moduleseminartime FROM " + Table2 + " WHERE modulename=? OR modulename=? OR modulename=? AND WHERE modulelecturedate=? OR moduleseminardate=?", new String[]{module1, module2, module3, day, day});  
    // looping through all rows and adding to list
    if (cursor.moveToFirst()) {
        do {
            tableModules module = new tableModules();
            module.modulename = cursor.getString(1);
            module.modulelecturedate = cursor.getString(2);
            module.moduleseminardate = cursor.getString(3);
            moduleList.add(module);
        } while (cursor.moveToNext());
    }
    // return contact list
    return moduleList;      
}

这是logcat：

02-23 01:18:27.177: E/SQLiteLog(3050): (1) near "WHERE": syntax error
02-23 01:18:27.192: D/AndroidRuntime(3050): Shutting down VM
02-23 01:18:27.217: E/AndroidRuntime(3050): FATAL EXCEPTION: main
02-23 01:18:27.217: E/AndroidRuntime(3050): Process: com.example.project, PID: 3050
02-23 01:18:27.217: E/AndroidRuntime(3050): java.lang.RuntimeException: Unable to resume activity {com.example.project/com.example.project.MainActivity}: android.database.sqlite.SQLiteException: near "WHERE": syntax error (code 1): , while compiling: SELECT modulename, modulelecturetime, moduleseminartime FROM Modules WHERE modulename=? OR modulename=? OR modulename=? AND WHERE modulelecturedate=? OR moduleseminardate=?
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2989)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3020)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2395)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.app.ActivityThread.access$800(ActivityThread.java:151)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.os.Handler.dispatchMessage(Handler.java:102)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.os.Looper.loop(Looper.java:135)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.app.ActivityThread.main(ActivityThread.java:5257)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at java.lang.reflect.Method.invoke(Native Method)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at java.lang.reflect.Method.invoke(Method.java:372)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
02-23 01:18:27.217: E/AndroidRuntime(3050): Caused by: android.database.sqlite.SQLiteException: near "WHERE": syntax error (code 1): , while compiling: SELECT modulename, modulelecturetime, moduleseminartime FROM Modules WHERE modulename=? OR modulename=? OR modulename=? AND WHERE modulelecturedate=? OR moduleseminardate=?
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1316)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1255)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at com.example.project.DB.getModuleTime(DB.java:134)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at com.example.project.MainActivity.onResume(MainActivity.java:106)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1257)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.app.Activity.performResume(Activity.java:6076)
02-23 01:18:27.217: E/AndroidRuntime(3050):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2978)
02-23 01:18:27.217: E/AndroidRuntime(3050):     ... 11 more

Answer 1

您的SQL有3个错误。

1）你需要把你的字符串常量放在引号中 - 'DIGITAL SECURITY'

2）你的where子句错了。它不是“WHERE x = 7 OR 10 OR 11”。它的“WHERE x = 7 OR x = 10 OR x = 11”。

3）下半场也是错的。你不能去“foo OR bar = 7”你需要去“foo = 7 OR bar = 7”

E / SQLiteLog（2082）:( 1）接近“安全”：语法错误

1 个答案: