我在SQLite中有一个语法错误

Question

代码

  db.execSQL("create table " + TABLE_WORKDETAILS + "( " + ID2 + " INTEGER PRIMARY KEY , Project TEXT, WorkDescription TEXT, Per Text, TimeIn DATETIME, TimeOut DATETIME, Twf_id INTEGER, FOREIGN KEY(Twf_id) REFERENCES "+TABLE_WORKFORCE+ "(ID))");
  db.execSQL("create table " + TABLE_STAFF_BENEFICT + "( "  + ID3 + " INTEGER PRIMARY KEY , Description TEXT , Amount TEXT, Twd_id INTEGER, FOREIGN KEY(Twd_id) REFERENCES + "+ TABLE_WORKDETAILS+ "(Twf_id))");

LogCat错误

  

    

java.lang.RuntimeException：无法启动活动ComponentInfo {com.example.project.project / com.example.project.project.CameraMain}：     android.database.sqlite.SQLiteException：near＆＃34; +＆＃34;：语法错误（代码     1）:,编译时：创建表StaffBenefict（_id INTEGER PRIMARY     KEY，描述文本，数量TEXT，Twd_id INTEGER，FOREIGN     KEY（Twd_id）REFERENCES + WorkDetails（Twf_id））                     在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2413）

  

Answer 1

只需在REFERENCES之后删除额外的 + ，此处

  db.execSQL("create table " + TABLE_STAFF_BENEFICT + "( "  + ID3 + " INTEGER PRIMARY KEY , Description TEXT , Amount TEXT, Twd_id INTEGER, FOREIGN KEY(Twd_id) REFERENCES + "+ TABLE_WORKDETAILS+ "(Twf_id))");

必须是

  db.execSQL("create table " + TABLE_STAFF_BENEFICT + "( "  + ID3 + " INTEGER PRIMARY KEY , Description TEXT , Amount TEXT, Twd_id INTEGER, FOREIGN KEY(Twd_id) REFERENCES "+ TABLE_WORKDETAILS+ "(Twf_id))");