php - MySQL-添加商店在休息后每天营业两次的营业时间

Question

餐厅周一上午 10 点至周二凌晨 03 点营业，周二上午 10 点至周三凌晨 03 点再次营业。

例如:
表:business_hour

id | weedDay | openDay | openTime | closeDay | closeTime
-----------------------------------------------------------
1  | Monday  | Monday  | 10:00:00 | Tuesday  | 03:00:00 
2  | Tuesday | Tuesday | 10:00:00 | Wednday  | 03:00:00

如何使 MySQL SELECT 语句显示餐厅是否营业？

<?php 

require_once "pdo/pdo.php";

    try {
    $stmt = $pdo->prepare("
            SELECT 
             CASE WHEN
                exists (
                  SELECT 1 FROM business_hour WHERE
                  (openday = dayname(now()) AND opentime <= time(now()))
                  OR
                  (closeday = dayname(now()) AND closetime >= time(now()))               
                )
                THEN 'Open'
                ELSE 'Closed'
              END status
            ");
    $stmt->execute();
    while ($row = $stmt->fetch(PDO::FETCH_ASSOC))
    {
        echo $row['status'];
    }


    } catch( PDOException $e ) {
        echo $e.'Not selected'; // error message
    }    
?>

Answer 1

我猜您想知道餐厅现在是否营业:

select 
  case when
    exists (
      select 1 from business_hour where
      (openday = dayname(now()) and opentime <= time(now()))
      or
      (closeday = dayname(now()) and closetime >= time(now()))               
    )
    then 'Open'
    else 'Closed'
  end status;

请参阅demo
仅当表 business_hour 中存在有效的日期名称时，此功能才有效，
因此像 Wednday 而不是 Wednesday 这样的拼写错误会导致该错误失败。