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正在做一個小項目來存儲員工的詳細信息並進行修改。我成功了，直到我添加名爲EmpID的員工ID列。並且數據沒有在表中插入顯示錯誤：數據庫表員工沒有名爲EmpID的列？
android.database.sqlite.SQLiteException: table Employees has no column named EmpID:
while compiling: INSERT INTO Employees(Mobile, Age, EmpID, Dept, EmployeeName) VALUES(?, ?, ?, ?, ?);
我不能夠得到的問題是什麼。這裏是一個用於創建數據庫表我databasehelper代碼..任何人都可以請幫我..
public class DatabaseHelper extends SQLiteOpenHelper {
static final String dbName="demoDB";
static final String employeeTable="Employees";
static final String colID="EmployeeID";
static final String colName="EmployeeName";
static final String colempId="EmpID";
static final String colAge="Age";
static final String colMobile="Mobile";
static final String colDept="Dept";
static final String deptTable="Dept";
static final String colDeptID="DeptID";
static final String colDeptName="DeptName";
static final String viewEmps="ViewEmps";
public DatabaseHelper(Context context) {
super(context, dbName, null,33);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL("CREATE TABLE "+deptTable+" ("+colDeptID+ " INTEGER PRIMARY KEY , "+
colDeptName+ " TEXT)");
db.execSQL("CREATE TABLE "+employeeTable+" ("+colID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+colName+" TEXT,"+colempId+" TEXT, "+
colAge+" Integer,"+colMobile+" TEXT, "+colDept+" INTEGER NOT NULL ,FOREIGN KEY ("+colDept+") REFERENCES "+deptTable+" ("+colDeptID+"));");
db.execSQL("CREATE TRIGGER fk_empdept_deptid " +
" BEFORE INSERT "+
" ON "+employeeTable+
" FOR EACH ROW BEGIN"+
" SELECT CASE WHEN ((SELECT "+colDeptID+" FROM "+deptTable+" WHERE "+colDeptID+"=new."+colDept+") IS NULL)"+
" THEN RAISE (ABORT,'Foreign Key Violation') END;"+
" END;");
db.execSQL("CREATE VIEW "+viewEmps+
" AS SELECT "+employeeTable+"."+colID+" AS _id,"+
" "+employeeTable+"."+colName+","+
" "+employeeTable+"."+colempId+","+
" "+employeeTable+"."+colAge+","+
" "+employeeTable+"."+colMobile+","+
" "+deptTable+"."+colDeptName+""+
" FROM "+employeeTable+" JOIN "+deptTable+
" ON "+employeeTable+"."+colDept+" ="+deptTable+"."+colDeptID
);
//Inserts pre-defined departments
InsertDepts(db);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS "+employeeTable);
db.execSQL("DROP TABLE IF EXISTS "+deptTable);
db.execSQL("DROP TRIGGER IF EXISTS dept_id_trigger");
db.execSQL("DROP TRIGGER IF EXISTS dept_id_trigger22");
db.execSQL("DROP TRIGGER IF EXISTS fk_empdept_deptid");
db.execSQL("DROP VIEW IF EXISTS "+viewEmps);
onCreate(db);
}
void AddEmployee(Employee emp)
{
SQLiteDatabase db= this.getWritableDatabase();
ContentValues cv=new ContentValues();
cv.put(colName, emp.getName());
cv.put(colempId, emp.getempID());
cv.put(colAge, emp.getAge());
cv.put(colMobile, emp.getMobile());
cv.put(colDept, emp.getDept());
//cv.put(colDept,2);
db.insert(employeeTable, colName, cv);
db.close();
}
int getEmployeeCount()
{
SQLiteDatabase db=this.getWritableDatabase();
Cursor cur= db.rawQuery("Select * from "+employeeTable, null);
int x= cur.getCount();
cur.close();
return x;
}
Cursor getAllEmployees()
{
SQLiteDatabase db=this.getWritableDatabase();
//Cursor cur= db.rawQuery("Select "+colID+" as _id , "+colName+", "+colAge+" from "+employeeTable, new String [] {});
Cursor cur= db.rawQuery("SELECT * FROM "+viewEmps,null);
return cur;
}
Cursor getAllDepts()
{
SQLiteDatabase db=this.getReadableDatabase();
Cursor cur=db.rawQuery("SELECT "+colDeptID+" as _id, "+colDeptName+" from "+deptTable,new String [] {});
return cur;
}
void InsertDepts(SQLiteDatabase db)
{
ContentValues cv=new ContentValues();
cv.put(colDeptID, 1);
cv.put(colDeptName, "Sales");
db.insert(deptTable, colDeptID, cv);
cv.put(colDeptID, 2);
cv.put(colDeptName, "IT");
db.insert(deptTable, colDeptID, cv);
cv.put(colDeptID, 3);
cv.put(colDeptName, "HR");
db.insert(deptTable, colDeptID, cv);
db.insert(deptTable, colDeptID, cv);
}
public String GetDept(int ID)
{
SQLiteDatabase db=this.getReadableDatabase();
String[] params=new String[]{String.valueOf(ID)};
Cursor c=db.rawQuery("SELECT "+colDeptName+" FROM"+ deptTable+" WHERE "+colDeptID+"=?",params);
c.moveToFirst();
int index= c.getColumnIndex(colDeptName);
return c.getString(index);
}
public Cursor getEmpByDept(String Dept)
{
SQLiteDatabase db=this.getReadableDatabase();
String [] columns=new String[]{"_id",colName,colempId,colAge,colMobile,colDeptName};
Cursor c=db.query(viewEmps, columns, colDeptName+"=?", new String[]{Dept}, null, null, null);
return c;
}
public int GetDeptID(String Dept)
{
SQLiteDatabase db=this.getReadableDatabase();
Cursor c=db.query(deptTable, new String[]{colDeptID+" as _id",colDeptName},colDeptName+"=?", new String[]{Dept}, null, null, null);
//Cursor c=db.rawQuery("SELECT "+colDeptID+" as _id FROM "+deptTable+" WHERE "+colDeptName+"=?", new String []{Dept});
c.moveToFirst();
return c.getInt(c.getColumnIndex("_id"));
}
public int UpdateEmp(Employee emp)
{
SQLiteDatabase db=this.getWritableDatabase();
ContentValues cv=new ContentValues();
cv.put(colName, emp.getName());
cv.put(colempId, emp.getempID());
cv.put(colAge, emp.getAge());
cv.put(colMobile, emp.getMobile());
cv.put(colDept, emp.getDept());
return db.update(employeeTable, cv, colID+"=?", new String []{String.valueOf(emp.getID())});
}
public void DeleteEmp(Employee emp)
{
SQLiteDatabase db=this.getWritableDatabase();
db.delete(employeeTable,colID+"=?", new String [] {String.valueOf(emp.getID())});
db.close();
}
}
，當我查看頁面上點擊錯誤信息正在逐漸被..
android.database.sqlite.sqlexception: no such column EmpID:, while compiling: select_id, EmployeeName, EmpID, Age, Mobile,DeptName FROM ViewEmps WHERE DeptName=?
在此先感謝....
請列這真的存在於DDMS中的表.. – OnkarDhane 2012-02-10 10:04:11
使用工具來查看手機上的SQLite數據庫，並檢查沒有任何問題升級... http://stackoverflow.com/questions/2149438/tool-to-請參閱-Android-database-tables-and-data – joshhendo 2012-02-10 10:14:13
@Smith ..我已經檢查過它，列不在表中。 – Nama 2012-02-10 10:15:16