SQL作为IF语句的结果返回一个字符串

Question

我的数据库中有以下表格：

我想编写一个具有以下逻辑的SQL查询：

IF QUIZZES<3, RETURN 'INCOMPLETE' ELSE 'COMPLETE'

如何制定查询？

由于

Answer 1

您可以使用CASE...ELSE...END或IF Statement。

试试这个：

SELECT (CASE WHEN QUIZZES < 3 THEN 'INCOMPLETE' ELSE 'COMPLETE' END) QuizStatus 
FROM tableA;

或

SELECT IF(QUIZZES < 3, 'INCOMPLETE', 'COMPLETE') QuizStatus 
FROM tableA;

Answer 2

select Name,STUDENT_ID,if(QUIZZES<3,'INCOMPLETE','COMPLETE') AS Status from table