我正在从数据库中删除,但不是连接表的工作删除,我选择costume_id(主键)和尝试删除这种方式,但它似乎只从一个表中删除,而不是全部表。我曾尝试在主键之前删除外键,但这不起作用。我是否必须加入表格然后删除或按照我的方式工作?选择,然后从数据库中
$select = $mysqli->query("SELECT * FROM costumes WHERE $q");
while ($row = $select->fetch_assoc())
$db_id = $row["costume_id"];
$costume = $mysqli->query("DELETE FROM costumes WHERE costume_id='$db_id'");
$costume_row = $costume->fetch_assoc();
$history = $mysqli->query("DELETE FROM history WHERE history_id='$db_id'");
$history_row = $history->fetch_assoc();
$location = $mysqli->query("DELETE FROM location WHERE location_id='$db_id'");
$location_row = $location->fetch_assoc();
$state = $mysqli->query("DELETE FROM state WHERE state_id='$db_id'");
$state_row = $state->fetch_assoc();
$ q是一个子流。在我的表有:
costumes (
costume_id varchar(10) primary key,
name varchar(50),
is_seperate bool,
is_onepeice bool,
description text,
color varchar(25),
material varchar(50),
genre varchar(25),
gender char(1),
size varchar(5)
);
state (
state_id varchar(10),
in_use bool,
fixed bool,
condition text,
foreign key (state_id) references costume(costume_id)
);
history (
history_id varchar(10),
previous_user varchar(20),
profession varchar(20),
previous_play varchar(50),
date date, fixed_previous bool,
comments text,
foreign key (history_id) references costume (costume_id)
);
location (
location_id varchar(10),
loc_no varchar(10) primary key,
room_no varchar(3),
foreign key (location_id) references costumes (costume_id)
);
我对删除新的查询是:
$delete = $mysqli->query("DELETE costumes,history,status,location FROM costumes join history on costumes.costume_id = history.history_id join status on status.status_id join location on location.location_id where costume_id='$db_id'");
查询是给我的限制问题
您是否有现有的SELECT查询可以向我们展示不基于我们的某个查询。什么能够显示你过去如何加入你所有的餐桌? – Andrew
我还没有加入任何表格。当我做选择时,我只编辑了一个表 – Meredith