android.database.sqlite.SQLiteException : 해당 열 없음 : aa :, 컴파일 중 : Select name from stud 여기서 Address = aa

Question

안드로이드 sqlite 데이터베이스에서 데이터를 검색하려고하지만 해당 열이 없다는 givine 예외가 있습니다.

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SQLite는 쿼리 선택입니다 - :

c=db.rawQuery("Select Name from stud Where Address="+a,null); 

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예외 : -

07-04 18:07:00.888: I/Database(648): sqlite returned: error code = 1, msg = no such column: aa 
07-04 18:07:00.910: D/AndroidRuntime(648): Shutting down VM 
07-04 18:07:00.910: W/dalvikvm(648): threadid=1: thread exiting with uncaught exception (group=0x40015560) 
07-04 18:07:00.948: E/AndroidRuntime(648): FATAL EXCEPTION: main 
07-04 18:07:00.948: E/AndroidRuntime(648): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.my.StudentInfoManagement/com.my.StudentInfoManagement.ListData}: android.database.sqlite.SQLiteException: no such column: aa: , while compiling: Select Name from stud Where Address=aa 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.os.Handler.dispatchMessage(Handler.java:99) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.os.Looper.loop(Looper.java:123) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.app.ActivityThread.main(ActivityThread.java:3683) 
07-04 18:07:00.948: E/AndroidRuntime(648): at java.lang.reflect.Method.invokeNative(Native Method) 
07-04 18:07:00.948: E/AndroidRuntime(648): at java.lang.reflect.Method.invoke(Method.java:507) 
07-04 18:07:00.948: E/AndroidRuntime(648): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
07-04 18:07:00.948: E/AndroidRuntime(648): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
07-04 18:07:00.948: E/AndroidRuntime(648): at dalvik.system.NativeStart.main(Native Method) 
07-04 18:07:00.948: E/AndroidRuntime(648): Caused by: android.database.sqlite.SQLiteException: no such column: aa: , while compiling: Select Name from stud Where Address=aa 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:92) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:65) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:83) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:49) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:42) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1356) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1324) 
07-04 18:07:00.948: E/AndroidRuntime(648): at com.my.StudentInfoManagement.DataHelper.show(DataHelper.java:86) 
07-04 18:07:00.948: E/AndroidRuntime(648): at com.my.StudentInfoManagement.ListData.onCreate(ListData.java:19) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
07-04 18:07:00.948: E/AndroidRuntime(648): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 
07-04 18:07:00.948: E/AndroidRuntime(648): ... 11 more 
07-04 18:07:03.140: I/Process(648): Sending signal. PID: 648 SIG: 9 

Answer 1

이것은 단순히 sql 쿼리가 잘못 되었기 때문입니다. 텍스트를 쿼리 할 때 쿼리 문자열 주위에 작은 따옴표를 추가해야합니다.

당신의 라인을 읽어야합니다 당신이 string를 사용하는 경우

c=db.rawQuery("Select Name from stud Where Address='"+a+"'",null); 

Answer 2

다음과 같은 단일 따옴표로 표현해야한다 :

Cursor cursor = db.rawQuery("SELECT '"+WINNER+"' FROM '"+TABLE.trim()+"' WHERE 
     country1='"+c1.trim()+"' AND Country2='"+c2.trim()+"'", null); 

당신이 다음 int 값 을 수행 할 수 있습니다 나타내는 경우 단순히 다음과 같이 사용하십시오 : +num+