SQL查询排除值

Question

我有一个查询，要在其中排除特定值（在此示例中为“垫子”）

该查询在没有子查询的情况下完美运行：

SELECT test.SAME , test.Nationality, test.Name, coalesce(test2.Job,'')jobb
  FROM test
  LEFT JOIN test2
  ON test.noID=test2.noID
  WHERE test.SAME = 555 and test.Name NOT IN (
                                              SELECT *
                                              FROM test
                                              WHERE test.NAME = "Mat"
                                              )
  group by SAME , name
  order by same desc  

这里的例子：

http://www.sqlfiddle.com/#!2/1f1fb/28

Answer 1

如果要将确切名称与Mat匹配，则可以执行以下操作：

SELECT test.SAME , test.Nationality, test.Name, coalesce(test2.Job,'')jobb
  FROM test
  LEFT JOIN test2
  ON test.noID=test2.noID
  WHERE test.SAME = 555 and test.Name != "Mat"

group by SAME , name
  order by same desc 

如果要排除所有包含Mat的内容，则：

SELECT test.SAME , test.Nationality, test.Name, coalesce(test2.Job,'')jobb
      FROM test
      LEFT JOIN test2
      ON test.noID=test2.noID
      WHERE test.SAME = 555 and test.Name NOT LIKE '%Mat%'

    group by SAME , name
      order by same desc 

如果要排除以Mat开头的内容，则：

SELECT test.SAME , test.Nationality, test.Name, coalesce(test2.Job,'')jobb
          FROM test
          LEFT JOIN test2
          ON test.noID=test2.noID
          WHERE test.SAME = 555 and test.Name NOT LIKE 'Mat%'

        group by SAME , name
          order by same desc 

Answer 2

您可以使用NOT LIKE 语句 ：

SELECT test.SAME , test.Nationality, test.Name, coalesce(test2.Job,'')jobb
  FROM test
  LEFT JOIN test2
  ON test.noID=test2.noID
  WHERE test.SAME = 555 and test.Name not like 'Mat'
  group by SAME , name
  order by same desc

SQLFiddle

或<>或!= 运算符 ：

SELECT test.SAME , test.Nationality, test.Name, coalesce(test2.Job,'')jobb
  FROM test
  LEFT JOIN test2
  ON test.noID=test2.noID
  WHERE test.SAME = 555 and test.Name <> 'Mat'
  group by SAME , name
  order by same desc

SQLFiddle

Answer 3

您的查询应为：-

SELECT test.SAME , test.Nationality, test.Name, coalesce(test2.Job,'')jobb
  FROM test
  LEFT JOIN test2
  ON test.noID=test2.noID
  WHERE test.SAME = 555 and test.Name NOT IN (
                                          SELECT NAME
                                          FROM test
                                          WHERE test.NAME = "Mat"
                                          )
  group by SAME , name
  order by same desc

Answer 4

子查询将不起作用，因为您在子查询中给了select *，但是在外部查询中，只有一个要匹配的列是test.Name。 如果您可以将子查询放入（SELECT test.Name FROM test WHERE test.NAME =“ Mat”）之类的子查询中，则整个查询都可以使用。 但顺便说一下，这里不需要子查询本身即可获得所需的结果。