我可以从2个表中查询吗？

我可以从2个表中查询吗？我可以从2个表中查询吗？

public Cursor getSen_List(long id_thsen) { 
    String strTmp = "select " 
     +SENS_TABLE+"."+KEY_SEN_ID+"," 
     +SENS_TABLE+"."+KEY_SEN_ID_TH_SEN+"," 
     +SENS_TABLE+"."+KEY_SEN_ID_LANG+"," 
     +SENS_TABLE+"."+KEY_SEN+"," 
     +SENS_TABLE+"."+KEY_SEN_READING+","  
     +LANGS_TABLE+"."+KEY_LANG 
     +" from "+SENS_TABLE+ ","+LANGS_TABLE 
     +" where "+SENS_TABLE+"."+KEY_SEN_ID_TH_SEN + "=" + id_thsen+ " and " 
     +SENS_TABLE+"."+KEY_LANG+"= " +("select" 
            +LANGS_TABLE+"."+KEY_LANG 
            +"from"+LANGS_TABLE 
            +"where"+LANGS_TABLE+"."+KEY_ACT+"=1"); 


        return db.rawQuery(strTmp,null);}

这是我的logcat

02-11 02:45:02.814: ERROR/AndroidRuntime(625): FATAL EXCEPTION: main 
02-11 02:45:02.814: ERROR/AndroidRuntime(625): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.proj/com.android.proj.Sens_Show}: android.database.sqlite.SQLiteException: no such column: Sentences.lang: , while compiling: select Sentences._id,Sentences.id_thsen,Sentences.id_lang,Sentences.sen,Sentences.reading,Languages.lang from Sentences,Languages where Sentences.id_thsen=1 and Sentences.lang= (select Languages.lang from Languages where Languages.active_status=1) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.os.Handler.dispatchMessage(Handler.java:99) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.os.Looper.loop(Looper.java:123) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at java.lang.reflect.Method.invoke(Method.java:521) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at dalvik.system.NativeStart.main(Native Method) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625): Caused by: android.database.sqlite.SQLiteException: no such column: Sentences.lang: , while compiling: select Sentences._id,Sentences.id_thsen,Sentences.id_lang,Sentences.sen,Sentences.reading,Languages.lang from Sentences,Languages where Sentences.id_thsen=1 and Sentences.lang= (select Languages.lang from Languages where Languages.active_status=1) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:80) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:46) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:42) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1345) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1315) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at com.android.proj.DBAdapter.getSen_List(DBAdapter.java:881) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at com.android.proj.Sens_Show.listData(Sens_Show.java:89) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at com.android.proj.Sens_Show.onCreate(Sens_Show.java:64) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
02-11 02:45:02.814: ERROR/AndroidRuntime(625):  ... 11 more

语句表

语言table`

private static final String CREATE_TABLE_3 = 
    " create table " + LANGS_TABLE + 
    " (_id integer primary key autoincrement," + 
    " lang text not null," + 
    " active_status integer not null);";

正确的语言，但出现5次类似

public Cursor getSen_List(long id_thsen) { 
    String strTmp = "select " 
     +SENS_TABLE+"."+KEY_SEN_ID+"," 
     +SENS_TABLE+"."+KEY_SEN_ID_TH_SEN+"," 
     +SENS_TABLE+"."+KEY_SEN_ID_LANG+"," 
     +SENS_TABLE+"."+KEY_SEN+"," 
     +SENS_TABLE+"."+KEY_SEN_READING+","  
     +LANGS_TABLE+"."+KEY_LANG 
     +" from "+SENS_TABLE+ ","+LANGS_TABLE 
     +" where "+SENS_TABLE+"."+KEY_SEN_ID_TH_SEN + "=" + id_thsen+ " and " 
     +SENS_TABLE+"."+KEY_LANG_ID+"= " +("(select " 
            +LANGS_TABLE+"."+KEY_LANG_ID 
            +" from "+LANGS_TABLE 
            +" where "+LANGS_TABLE+"."+KEY_ACT+"=1)"); 


        return db.rawQuery(strTmp,null);}

来源

2011-02-10 praew_z

当你尝试时会发生什么？ – 2011-02-10 19:28:18

强制关闭....我认为也许是因为小错误，但我找不到，请你帮忙... – 2011-02-10 19:36:16

你在你的子查询需要大约select，from和where空间languages`量。您可能也应该在()中包含该子查询。

public Cursor getSen_List(long id_thsen) { 
    String strTmp = "select " 
     +SENS_TABLE+"."+KEY_SEN_ID+"," 
     +SENS_TABLE+"."+KEY_SEN_ID_TH_SEN+"," 
     +SENS_TABLE+"."+KEY_SEN_ID_LANG+"," 
     +SENS_TABLE+"."+KEY_SEN+"," 
     +SENS_TABLE+"."+KEY_SEN_READING+","  
     +LANGS_TABLE+"."+KEY_LANG 
     +" from "+SENS_TABLE+ ","+LANGS_TABLE 
     +" where "+SENS_TABLE+"."+KEY_SEN_ID_TH_SEN + "=" + id_thsen+ " and " 
     +SENS_TABLE+"."+KEY_LANG+"= " +("(select " 
            +LANGS_TABLE+"."+KEY_LANG 
            +" from "+LANGS_TABLE 
            +" where "+LANGS_TABLE+"."+KEY_ACT+"=1)"); 


        return db.rawQuery(strTmp,null);}

编辑：

现在你已经发布的日志，你可以看到这行

Caused by: android.database.sqlite.SQLiteException: no such column: Sentences.lang:

指向错误。在Sentences表中没有列lang

来源

2011-02-10 19:43:21 Damp

我可以从2个表中查询吗？

回答

相关问题