Expression Web中的查询语句

Question

主席先生，Expression Web中的以下声明适用于第一个标准 SELECT COUNT(Rly) AS CR FROM SPAD WHERE Rly='CR'。

现在的问题是，如果同一列中需要多个条件，例如Count(Rly) AS ER FROM SPAD WHERE Rly='ER'

需要什么声明？ 请帮忙。

Answer 1

计算两个值：

SELECT COUNT(Rly) AS TheCount FROM SPAD WHERE Rly IN ('CR', 'ER')

一次性分开计算：

SELECT COUNT(Rly) AS TheCount, Rly 
FROM SPAD
WHERE Rly IN ('CR', 'ER')
GROUP BY Rly