SQL Server 2014 Management Studio - PRINT問題

Question

我無法理解print的工作原理，我沒有找到好的信息。 Stackoverflow問一些更多的細節，但我可以寫更多？

declare @count int, 
     @experience varchar(30), 
     @date date, 
     @salary_old int, 
     @salary_new int, 
     @first_name varchar(30), 
     @second_name varchar(30), 
     @last_name varchar(30), 
     @i int=0 

set @count = (select count(*) from cadre) 

print ('-----------------------------------------------------------------------------------\n') 
print ('id\tfirst_name\tsecond_name\tlast_name\told_salary\tnew_salary\texperience(years)\n') 
WHILE @i < @count 
BEGIN 
    set @date = (select date_of_start_work from cadre where id_cadre=@i) 
    set @first_name = rtrim((select first_name from cadre where id_cadre=@i)) 
    set @second_name = rtrim((select @second_name from cadre where id_cadre=@i)) 
    set @last_name = rtrim((select @last_name from cadre where id_cadre=@i)) 
    set @experience = rtrim(cast(((select year((SELECT GETDATE()))) - (select year(@date))) as varchar(30))) 
    set @salary_old = rtrim(cast((select salary from cadre where id_cadre=@i) as varchar(30))) 
    set @salary_new = @salary_old*(@experience/100+1); 

    update cadre 
    set salary = @salary_new 
    where id_cadre = @i 

    print(rtrim(cast(@i as varchar(10)))+'\t'+@first_name+'\t'+@second_name+'\t'+@last_name+'\t'+@salary_old+'\t'+rtrim(cast(@salary_new as varchar(10)))+'\t'+@experience+N'\t') 

    set @i=@i+1 
END 

print(@count) 

錯誤：

Msg 245, Level 16, State 1, Line 28
Ошибка преобразования значения varchar "\t" в тип данных int.

Error converting varchar "\ t" value to data type int.

Answer 1

你需要轉換@salary_old也可以使用STR（@salary_old）