比較2個表中的數據SQL

Question

幫助我是新手。 我正在嘗試提取可能在一個表中但不在另一個表中的數據。

這將返回相同信息的多行。

SELECT DISTINCT *
FROM Schools, Schools_Current
WHERE ([Schools].[School_ID]<>[Schools_Current].[School_ID]);

Answer 1

您可以嘗試以下方法：

SELECT DISTINCT * 
FROM Schools_Current
WHERE School_ID NOT IN (
  SELECT School_ID
  FROM Schools
)