我是否可以覆盖列';选择案例SQL中的s值
我是否可以重写列中的值,以便如果大小写为true,它会告诉值x等于查询中的另一个动态值。这是伪代码。我知道这行不通我是否可以覆盖列';选择案例SQL中的s值,sql,case,Sql,Case,我是否可以重写列中的值,以便如果大小写为true,它会告诉值x等于查询中的另一个动态值。这是伪代码。我知道这行不通 Select jobTitle, managerTitle, bigBossTitle, CASE WHEN jobtitle like '%DEVELOP%' THEN managerTitle = bigBossTitle END From PeopleTable inner join... other tables... 谢谢。试试这样: Select j
Select jobTitle, managerTitle, bigBossTitle,
CASE WHEN jobtitle like '%DEVELOP%' THEN managerTitle = bigBossTitle
END
From PeopleTable
inner join... other tables...
谢谢。试试这样:
Select jobTitle, managerTitle, bigBossTitle, IF(jobtitle like '%DEVELOP%', bigBossTitle, OTHER_VALUE_IF_FALSE) AS managerTitle
From PeopleTable
inner join... other tables...
试试这个:
Select
jobTitle,
CASE WHEN jobtitle like '%DEVELOP%'
THEN bigBossTitle
ELSE managerTitle
END as managerTitle,
bigBossTitle,
From PeopleTable
inner join... other tables...
Select jobTitle,
CASE
WHEN jobtitle like '%DEVELOP%'
THEN bigBossTitle
ELSE managerTitle
END as managerTitle,
bigBossTitle
From PeopleTable
inner join... other tables...
您只需将case语句放在managertile列所在的位置,然后将结果别名为managertile。这种逻辑有效地为您提供了所需的信息。要真正“替换”一个值,您需要执行更高级的T-SQL,而这并不是必须的
在连接谓词中使用case语句的示例:
...
inner join otherTable
on otherTable.bossTitle =
CASE WHEN jobtitle like '%DEVELOP%'
THEN bigBossTitle
ELSE managerTitle
END
试试这个:
Select
jobTitle,
CASE WHEN jobtitle like '%DEVELOP%'
THEN bigBossTitle
ELSE managerTitle
END as managerTitle,
bigBossTitle,
From PeopleTable
inner join... other tables...
Select jobTitle,
CASE
WHEN jobtitle like '%DEVELOP%'
THEN bigBossTitle
ELSE managerTitle
END as managerTitle,
bigBossTitle
From PeopleTable
inner join... other tables...
你很接近。您的
案例将如下所示:
Select jobTitle, bigBossTitle,
CASE
WHEN jobtitle like '%DEVELOP%'
THEN bigBossTitle
ELSE managerTitle
END as managerTitle
From PeopleTable
inner join... other tables...
干杯我现在要试一试。我是非常亲密的伙伴。在一个相当长的查询结束时,我有一个内部连接,现在我需要managertile的新值来连接到另一个表。表2上的内部联接表2=managertile。有可能吗?@Sean:是的,有可能。在最简单的形式中,只需在连接谓词/子句中使用case语句,但请删除别名as managerTitle
)@Sean:我更新了答案,以包含在连接谓词中使用case语句的示例。感谢您花时间,Paul。我很感激。我试试看。