sql - 如何连接两个 SQL 查询？

Question

对同一个表进行两个 SQL 查询

SELECT FirstName,
       LastName,
       LEFT(FirstName, 1) + '.' + LEFT(LastName, 1) AS Initial
FROM   ContactUpdates

这输出：

FirstName    LastName    Initial

我希望这个在 Initial 结束的右侧加入另一个

SELECT LOWER(LEFT(FirstName, 1) + REPLACE(LastName,'''','' ) )
         + '@email.com' AS Email
FROM   ContactUpdates

最后我希望它成为

 FirstName    LastName    Initial    Email 

但我不知道如何让他们加入任何帮助？

Answer 1

SELECT FirstName, 
    LastName, 
    LEFT(FirstName,1) + '.' + LEFT(LastName,1) AS Initial, 
    LOWER(LEFT(FirstName, 1) + REPLACE(LastName, '''', '')) + '@email.com' AS Email
FROM ContactUpdates

Answer 2

然后只需将该列附加到查询中：

SELECT FirstName
     , LastName
     , LEFT(FirstName,1) + '.' + LEFT(LastName,1) AS Initial 
     , LOWER(LEFT(FirstName,1) + REPLACE(LastName,'''','' ) ) + '@email.com' AS Email
FROM ContactUpdates