Question

我是SQL查询的初学者。我需要在表中找到尚未成功的Error1记录。

我的表格如下：

select * 
from Table1 
where not exists (select success.ImportID, success.LineNumber 
                  from Table1 success 
                  join 
                      (select ImportID, LineNumber
                       from Table1 
                       where status = 'Error1') overlap on overlap.linenumber = success.LineNumber 
                                                        and overlap.ImportID = success.ImportID
                  where success.status = 'success')

此查询不返回包含importId 195和linenumber 7

的行

{{1}}

Answer 1

这是一种更简单的方法，INSERT INTO Specialization ( Specialization_name, Specialization_id, Specialty_id ) VALUES( 'Network technologies','(SELECT Max(Specialization_id) FROM Specialization WHERE Specialty_id = '2')+1', '2');：

EXCEPT

注意：SELECT ImportID, LineNumber FROM Table1 WHERE Status = 'Error1' EXCEPT SELECT ImportID, LineNumber FROM Table1 WHERE Status = 'Success'与EXCEPT一样，会创建一个不同的结果集。如果您不需要或想要不同的结果，那么UNION会表现得更好。

Answer 2

你已经过度复杂了，只需选择那些有错误但不存在相同记录的人

'OPTIONS':  {
                    'ssl': {'ssl-ca': '<PATH TO CA CERT>',

                            }
                      }

Answer 3

我认为这可以满足您的需求：

List<Person> allSearch = dataContext
    .User
    .Where(n => n.FirstName.Contains(search))
    .ToList();

Answer 4

您可以使用[error1 table]左连接[success table]的简单左连接，并选择[success table]中找不到的记录。检查以下查询。

SELECT E.IMPORTID, E.LINENUMBER, E.STATUS
FROM
(SELECT IMPORTID, LINENUMBER FROM TABLE1 WHERE STATUS = 'Error1') E
LEFT JOIN
(SELECT IMPORTID, LINENUMBER FROM TABLE1 WHERE STATUS = 'Success') S
ON E.IMPORTID = S.IMPORTID AND E.LINENUMBER = S.LINENUMBER
WHERE S.IMPORTID IS NULL AND S.LINENUMBER IS NULL;

Answer 5

select ImportID, LineNumber
from Table1 t1
where Status in ('Success', 'Error1')
group by ImportID
having max(Status) = 'Error1'

查找不成功的记录

5 个答案: