php - 使用MAX选择mysql数据

Question

我有这样的测试数据:

DROP TABLE SELECT_PASS;
CREATE TABLE SELECT_PASS(ID INT(20),TESTCASE VARCHAR(20),RESULT VARCHAR(20));
INSERT INTO SELECT_PASS VALUES(1,"TC1","PASS");
INSERT INTO SELECT_PASS VALUES(2,"TC2","PASS");
INSERT INTO SELECT_PASS VALUES(3,"TC3","INCONC");
INSERT INTO SELECT_PASS VALUES(4,"TC1","FAIL");
INSERT INTO SELECT_PASS VALUES(5,"TC21","FAIL");
INSERT INTO SELECT_PASS VALUES(6,"TC4","PASS");
INSERT INTO SELECT_PASS VALUES(7,"TC3","PASS");
INSERT INTO SELECT_PASS VALUES(8,"TC2","PASS");
INSERT INTO SELECT_PASS VALUES(9,"TC1","TIMEOUT");


SELECT TESTCASE, MAX(RESULT) FROM SELECT_PASS  GROUP BY TESTCASE;

我得到的结果是:

TC1 TIMEOUT
TC2 PASS
TC21    FAIL
TC3 PASS
TC4 PASS

基本上我想看看那些从未通过的测试用例。

有什么办法吗？

谢谢。

Answer 1

这将为您提供所有没有通过结果的测试用例名称:

SELECT DISTINCT TESTCASE FROM SELECT_PASS
 WHERE TESTCASE NOT IN (SELECT TESTCASE FROM SELECT_PASS WHERE RESULT = 'PASS')