SQL - 保持出错错误关键字'AS'附近的语法错误

Question

不断出现错误关键字'AS'附近的语法不正确

下面是否有错误？

SELECT AVG(salary) AS [Average_Salary], 
CONCAT('$',FORMAT(MIN(salary),2) AS [Minimum_salary], 
concat('$',format (MAX(salary),2) AS [Maximum_salary] 
FROM Salaries 
WHERE (yearID = 1991); 

Answer 1

必须关闭concat括号：

SELECT AVG(salary) AS [Average_Salary], 
CONCAT('$',FORMAT(MIN(salary),2)) AS [Minimum_salary], 
concat('$',format (MAX(salary),2)) AS [Maximum_salary] 
FROM Salaries 
WHERE (yearID = 1991);