[sql] Operand type clash: int is incompatible with date + The INSERT statement conflicted with the FOREIGN KEY constraint

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)

My question is there is an error in every insert

Operand type clash: int is incompatible with date

How to fix this?

Also here ...

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 (2),
emp_dob date,
emp_hire_date date, 
)
insert into employee(emp_num,emp_title,emp_lname,emp_fname,emp_initial,emp_dob,emp_hire_date)
values (100,'Mr.','Kolmycz','George','D',15-5-1942,15-3-1987)
insert into employee(emp_num,emp_title,emp_lname,emp_fname,emp_initial,emp_dob,emp_hire_date)
values (101,'Ms.','Lewis','Rhonda','G',19-3-1965,25-4-1988)
insert into employee(emp_num,emp_title,emp_lname,emp_fname,emp_initial,emp_dob,emp_hire_date)
values (102,'Mr.','Vandam','Rhett',' ',14-11-1958,20-12-1992)
insert into employee(emp_num,emp_title,emp_lname,emp_fname,emp_initial,emp_dob,emp_hire_date)
values (103,'Ms.','Jones','Anne','M',16-10-1974,28-8-2005)
insert into employee(emp_num,emp_title,emp_lname,emp_fname,emp_initial,emp_dob,emp_hire_date)
values (104,'Mr.','Lange','John','P',08-11-1971,20-10-1996)
insert into employee(emp_num,emp_title,emp_lname,emp_fname,emp_initial,emp_dob,emp_hire_date)
values (105,'Mr.','williams','Robert','D',14-3-1975,08-1-2006)
insert into employee(emp_num,emp_title,emp_lname,emp_fname,emp_initial,emp_dob,emp_hire_date)
values (106,'Mrs.','Duzak','Jeanine','K',12-2-1968,05-1-1991)
insert into employee(emp_num,emp_title,emp_lname,emp_fname,emp_initial,emp_dob,emp_hire_date)
values (107,'Mr.','Diante','Jorge','D',21-8-1974,05-1-1991)
insert into employee(emp_num,emp_title,emp_lname,emp_fname,emp_initial,emp_dob,emp_hire_date)
values (108,'Mr.','Wlesenbach','Paul','R',14-2-1966,18-11-1994)
insert into employee(emp_num,emp_title,emp_lname,emp_fname,emp_initial,emp_dob,emp_hire_date)
values (109,'Ms.','Travis','Elizabeth','K',18-6-1961,14-4-1991)
insert into employee(emp_num,emp_title,emp_lname,emp_fname,emp_initial,emp_dob,emp_hire_date)
values (110,'Mrs.','Genkazi','Leighla','W',19-5-1970,01-12-1992)        

Msg 547, Level 16, State 0, Line 1 The INSERT statement conflicted with the FOREIGN KEY constraint "FK__crew__emp_num__0F975522". The conflict occurred in database "melisa", table "dbo.employee", column 'emp_num'. error on this table

create table earndrating(
emp_num int,
constraint PK_earndarating primary key(emp_num, rtg_code),
rtg_code varchar(6),
foreign key (emp_num) references pilot(emp_num),
foreign key(rtg_code) references rating(rtg_code),
earningth_date varchar(20),
)
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(101,'CFI','18-Feb-98' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(101,'CFII','14-Dec-05' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(101,'INSTR','08-Nov-93' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(101,'MEL','23-Jun-94' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(101,'SEL','21-Apr-93' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(104,'INSTR','14-Jul-96' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(104,'MEL','29-Jan-97' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(104,'SEL','12-Mar-95' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(105,'CFI','18-Nov-97' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(105,'INSTR','17-Apr-95' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(105,'MEL','12-Aug-95' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(105,'SEL','23-Sep-94' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(106,'INSTR','20-Dec-95' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(106,'MEL','02-Apr-95' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(105,'SEL','10-Mar-94' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(109,'CFI','05-Nov-98' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(109,'CFII','21-Jun-03' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(109,'INSTR','23-Jul-96' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(109,'MEL','15-Marc-97' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(109,'SEL','05-Feb-96' )
    insert into earndrating(emp_num,rtg_code,earningth_date)
    values(109,'SES','12-May-96' )

Try wrapping your dates in single quotes, like this:

'15-6-2005'

It should be able to parse the date this way.

I had the same problem. I tried 'yyyy-mm-dd' format i.e. '2013-26-11' and got rid of this problem...

FYI this turned out to be an issue for me where I had two tables in a statement like the following:

SELECT * FROM table1
UNION ALL
SELECT * FROM table2

It worked, but then somewhere along the line the order of columns in one of the table definitions got changed. Changing the * to SELECT column1, column2 fixed the issue. No idea how that happened, but lesson learned!