leecode_CN#177:第N高的薪水

#177

• 中等
• 考察點：PROC、if、176升級版、語法
• 總結：語法不熟悉，喫虧

138ms
CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
BEGIN
    DECLARE P INT ;
    IF(N<=0) THEN
        set P=0;
    else 
        set P=N-1;
    END IF;
    RETURN (
        # Write your MySQL query statement below.
        
        select DISTINCT Salary
        from Employee
        order by Salary DESC
        limit 1 OFFSET P
    );
END


138ms
CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
BEGIN
    DECLARE P INT default N-1;
    IF(P<0) THEN
        RETURN NULL;
    else 
        RETURN (
        # Write your MySQL query statement below.
        
            select DISTINCT Salary
            from Employee
            order by Salary DESC
            limit 1 OFFSET P
        );
    END IF;
END