sql [sql]将多行合并并组合成一个，同时用其他数据替换NULL值。

Posted 2021-05-14

SELECT
  [Email], 
  max([FirstName]),
  max([LastName]),
  max(CAST([RegisteredVoter] AS INT)),
  max([ZipCode])
FROM [Contacts] 
GROUP BY [Email]
HAVING COUNT([Email]) > 1