WHERE clause return incorrect result

Question

I want return all the records that have as team_id a certain number and have a specific round_id, so I wrote this query:

SELECT * FROM `match` WHERE home_team_id = 68 OR away_team_id = 68 AND round_id = 70

this will return:

{
    "id": "61032",
    "round_id": "70",
    "home_team_id": "68",
    "away_team_id": "76",
},
{
    "id": "61052",
    "round_id": "75",
    "home_team_id": "68",
    "away_team_id": "74",
},

why I get also the record with round_id = 75?

Answer 1

You probably just need some parentheses to group your logic statements:

SELECT * 
FROM match 
WHERE home_team_id = 68 
    OR (
        away_team_id = 68 
        AND 
        round_id = 70
        )

Answer 2

我认为你想要的逻辑是：

where 68 in (home_team_id, away_team_id) and round_id = 70

您还可以通过调整括号来修复逻辑。