小编Jeo*_*era的帖子

create table pilot (
emp_num int,
pl_license varchar (3),
pl_ratings varchar (30),
pl_med_type int,
pl_med_date date,
pl_pt135_date date,
constraint PK_pilot primary key (emp_num)
)

insert into pilot(emp_num,pl_license,pl_ratings,pl_med_type,pl_med_date,pl_pt135_date)
values (101,'ATP','SEL/MEL/instr/CFII',1,12-4-2005,15-6-2005)
insert into pilot(emp_num,pl_license,pl_ratings,pl_med_type,pl_med_date,pl_pt135_date)
values (104,'ATP','SEL/MEL/instr',1,10-5-2005,23-3-2006)
insert into pilot(emp_num,pl_license,pl_ratings,pl_med_type,pl_med_date,pl_pt135_date)
values (105,'COM','SEL/MEL/instr/CFI',2,25-2-2006,12-2-2005)
insert into pilot(emp_num,pl_license,pl_ratings,pl_med_type,pl_med_date,pl_pt135_date)
values (106,'COM','SEL/MEL/instr',2,02-4-2006,24-12-2005)
insert into pilot(emp_num,pl_license,pl_ratings,pl_med_type,pl_med_date,pl_pt135_date)
      values (109,'COM','SEL/MEL/instr/CFII',1,14-4-2006,21-4-2006)

我的问题是每个插页都有错误

操作数类型冲突:int与日期不兼容

如何解决这个问题？

也在这里 ...

create table employee (
emp_num int,
constraint PK_employee primary key (emp_num),
foreign key(emp_num) references pilot(emp_num),
emp_title varchar (4),
emp_lname varchar (20),
emp_fname varchar (30),
emp_initial varchar …

我希望MDI父项自动调整子表单的大小,使其适合内部而不需要滚动条.有人能提供一些代码吗？

我已经用它来区分父级和子级的大小,并将其添加到父级的大小,这样我就可以得到一个合适的大小.但它是如此手动,需要很长时间才能完成.

void MDICentertoScreen(Form z,Size addedsize)
{
        foreach (Form f in this.MdiChildren)
        {
            f.Close();
        }
        z.StartPosition = FormStartPosition.CenterScreen;
        z.MdiParent = this;

        //  this.Size = Size.Add(z.Size, addedsize);
        this.CenterToScreen();
        z.Show();
}

create database Exer4

use Exer4

create table customer ( 
    cus_code int,
    constraint PK_customer primary key (cus_code),
    cus_Lname varchar(20),
    cus_Fname varchar (30),
    cus_intial varchar (2),
    cus_areacode int,
    cus_phone int,
    cus_balance float
     )

create table charter (
    char_trip int,
    constraint PK_charter primary key (char_trip),
    char_date date,
    ac_number varchar(5),
    foreign key(ac_number) references aircraft,
    char_destination varchar(5),
    char_distance float,
    char_hours_flown float,
    char_hours_wait float,
    char_fuel_gallons float,
    cus_code int,
    foreign key(cus_code) references customer
    )


    create table aircraft(

    ac_number varchar(5),
    constraint PK_aircraft primary key(ac_number),
    mod_code varchar(10),
    foreign key(mod_code) …