php - 预订 session 室；选择给定时间段内的可用房间

Question

我正在制作一个 session 室预订系统，您可以在其中选择特定的时间段，然后您应该在那时获得可用的房间。 一些表的名称是法语，因此我将在需要时提供 () 之间的含义。 我的问题是，当我选择时间时，我什至没有找到可用的房间。我认为我的查询有一些问题。 所以，我有一张预订 table 、教授 table 和salle(法语的意思是房间) table 。 预约表有以下列:idReservation、dateReservation、hDebut( session 开始时间)、 hFin(结束时间),idSalle(房间id)

这里是创建表查询:如果您不明白某些列名可能是谁，请发表评论，就像我用法语所说的那样。

CREATE TABLE `reservation` (
  `idReservation` int(11) NOT NULL,
  `dateReservation` date DEFAULT NULL,
  `hDebut` time NOT NULL,
  `hFin` time NOT NULL,
  `dateModificationReservation` date DEFAULT NULL,
  `motifReservation` varchar(50) NOT NULL,
  `idSalle` int(11) NOT NULL,
  `idProf` int(11) NOT NULL,
  `etatreserv` int(10) NOT NULL
) 

etatreserv(2表示等待，1表示拒绝，0表示接受)代表房间的状态，因为用户发送预订房间一段时间的请求，并且管理员可以选择接受/拒绝，即使房间有空

INSERT INTO `reservation`(`idReservation`, `dateReservation`, `hDebut`, `hFin`, `dateModificationReservation`, `motifReservation`, `idSalle`, `idProf`, `etatreserv`) VALUES (1,'2019-06-14','15:00:00','18:00:00','2019-06-09','administrative meeting',1,12,2)

CREATE TABLE `salle` (
  `idSalle` int(11) NOT NULL,
  `intitule` varchar(40) NOT NULL,
  `NumeroSalle` int(255) NOT NULL
)

INSERT INTO `salle` (`idSalle`, `intitule`, `NumeroSalle`) VALUES
(1, 'salle de reunion 1', 1),
(10, 'salle 18', 18);

CREATE TABLE `professeur` (
  `idProf` int(11) NOT NULL,
  `nomProf` varchar(50) NOT NULL,
  `prenomProf` varchar(50) NOT NULL,
  `tel` int(10) UNSIGNED NOT NULL,
  `email` varchar(255) NOT NULL,
  `profpwd` varchar(255) NOT NULL,
  `dateAddProf` date NOT NULL,
  `dateModificationProf` date NOT NULL,
  `idDepart` int(11) NOT NULL
)

INSERT INTO `professeur` (`idProf`, `nomProf`, `prenomProf`, `tel`, `email`, `profpwd`, `dateAddProf`, `dateModificationProf`, `idDepart`) VALUES
(12, 'ddd', 'dd', 444, 'email@email.com', 'pwd', '2019-06-05', '2019-06-05', 5);

我已经尝试过:

SELECT * FROM reservation left OUTER JOIN salle on reservation.idSalle = salle.idSalle WHERE (
    (reservation.dateReservation IS NULL) 
    OR 
    (reservation.dateReservation != ':dateReservation')
     OR 
     ((reservation.dateReservation = ':dateReservation') AND (reservation.hDebut NOT BETWEEN ':hDebut' AND ':hFin') AND (reservation.hFin NOT BETWEEN ':hDebut' AND ':hFin'))
      OR
       ((reservation.dateReservation = ':dateReservation') AND (reservation.hDebut >':hDebut' AND  reservation.hFin <':hFin'))   
     )

然后我尝试了一个更简化的版本:

    dateReservation = ':dateReservation' AND
    (hDebut BETWEEN ':hDebut' AND ':hFin' OR hFin BETWEEN ':hDebut' AND ':hFin' OR
    (hDebut < ':hDebut' AND hFin > ':hFin'))))```

example : 
salle table 
idSalle | name
1       |salle de reunion 1
10      |salle18
3       |salle3 

reservation table 
idReservation|dateReservation|hDebut   |hFin     |idSalle
1            |2019-06-14     |15:00:00 |18:00:00 |1

if for example  i choose dateReservation = 2019-06-14, hDebut=16:00:00,
hFin = 17:00:00 then all i should see are : salle2 and salle3 

PS : I'm new to stackoverflow and the syntax highlighting confused me a bit, so I'm sorry if my code doesn't show up as it should.

Answer 1

    DROP TABLE IF EXISTS salle;

    CREATE TABLE salle 
    (salle_id SERIAL PRIMARY KEY
    ,name VARCHAR(12) UNIQUE
    );

    INSERT INTO salle VALUES
    (1,'salle1'),
    (2,'salle2'),
    (3,'salle3');


    DROP TABLE IF EXISTS reservation ;

    CREATE TABLE reservation 
    (reservation_id SERIAL PRIMARY KEY
    ,reservation_from DATETIME NOT NULL
    ,reservation_to DATETIME NULL
    ,salle_id INT NOT NULL
    );

    INSERT INTO reservation VALUES
    (1,'2019-06-14 15:00:00','2019-06-14 18:00:00',1);

    SELECT s.*
      FROM salle s
      LEFT 
      JOIN reservation r
        ON r.salle_id = s.salle_id
       AND reservation_from <= '2019-06-14 17:00:00'
       AND reservation_to  >= '2019-06-14 16:00:00'
     WHERE r.reservation_id IS NULL;

+----------+--------+
| salle_id | name   |
+----------+--------+
|        2 | salle2 |
|        3 | salle3 |
+----------+--------+