313 lines
7.2 KiB
Vue
313 lines
7.2 KiB
Vue
|
<script setup>
|
|||
|
|
import { ref } from 'vue'
|
|||
|
|
|
|||
|
|
const activeTab = ref('excel') // 'excel' or 'db'
|
|||
|
|
|
|||
|
|
// Excel Data (Flat, Redundant)
|
|||
|
|
const excelData = [
|
|||
|
|
{
|
|||
|
|
id: 1,
|
|||
|
|
date: '2023-10-01',
|
|||
|
|
book: 'AI 入门',
|
|||
|
|
price: 59,
|
|||
|
|
user: '张三',
|
|||
|
|
phone: '13800138000'
|
|||
|
|
},
|
|||
|
|
{
|
|||
|
|
id: 2,
|
|||
|
|
date: '2023-10-02',
|
|||
|
|
book: 'Python 编程',
|
|||
|
|
price: 89,
|
|||
|
|
user: '李四',
|
|||
|
|
phone: '13900139000'
|
|||
|
|
},
|
|||
|
|
{
|
|||
|
|
id: 3,
|
|||
|
|
date: '2023-10-03',
|
|||
|
|
book: '算法导论',
|
|||
|
|
price: 120,
|
|||
|
|
user: '张三',
|
|||
|
|
phone: '13800138000'
|
|||
|
|
},
|
|||
|
|
{
|
|||
|
|
id: 4,
|
|||
|
|
date: '2023-10-03',
|
|||
|
|
book: '数据库原理',
|
|||
|
|
price: 45,
|
|||
|
|
user: '王五',
|
|||
|
|
phone: '13700137000'
|
|||
|
|
},
|
|||
|
|
{
|
|||
|
|
id: 5,
|
|||
|
|
date: '2023-10-04',
|
|||
|
|
book: 'Vue.js 实战',
|
|||
|
|
price: 78,
|
|||
|
|
user: '张三',
|
|||
|
|
phone: '13800138000'
|
|||
|
|
}
|
|||
|
|
]
|
|||
|
|
|
|||
|
|
// DB Data (Normalized)
|
|||
|
|
const usersTable = [
|
|||
|
|
{ id: 101, name: '张三', phone: '13800138000' },
|
|||
|
|
{ id: 102, name: '李四', phone: '13900139000' },
|
|||
|
|
{ id: 103, name: '王五', phone: '13700137000' }
|
|||
|
|
]
|
|||
|
|
|
|||
|
|
const ordersTable = [
|
|||
|
|
{ id: 1, date: '2023-10-01', book: 'AI 入门', price: 59, user_id: 101 },
|
|||
|
|
{ id: 2, date: '2023-10-02', book: 'Python 编程', price: 89, user_id: 102 },
|
|||
|
|
{ id: 3, date: '2023-10-03', book: '算法导论', price: 120, user_id: 101 },
|
|||
|
|
{ id: 4, date: '2023-10-03', book: '数据库原理', price: 45, user_id: 103 },
|
|||
|
|
{ id: 5, date: '2023-10-04', book: 'Vue.js 实战', price: 78, user_id: 101 }
|
|||
|
|
]
|
|||
|
|
|
|||
|
|
const hoveredUserId = ref(null)
|
|||
|
|
|
|||
|
|
const setHover = (id) => {
|
|||
|
|
hoveredUserId.value = id
|
|||
|
|
}
|
|||
|
|
</script>
|
|||
|
|
|
|||
|
|
<template>
|
|||
|
|
<div class="relational-demo">
|
|||
|
|
<div class="tabs">
|
|||
|
|
<div
|
|||
|
|
class="tab"
|
|||
|
|
:class="{ active: activeTab === 'excel' }"
|
|||
|
|
@click="activeTab = 'excel'"
|
|||
|
|
>
|
|||
|
|
Excel 模式 (单表)
|
|||
|
|
</div>
|
|||
|
|
<div
|
|||
|
|
class="tab"
|
|||
|
|
:class="{ active: activeTab === 'db' }"
|
|||
|
|
@click="activeTab = 'db'"
|
|||
|
|
>
|
|||
|
|
数据库模式 (多表关联)
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
<div class="content-area">
|
|||
|
|
<!-- Excel Mode -->
|
|||
|
|
<div v-if="activeTab === 'excel'" class="excel-view">
|
|||
|
|
<div class="table-wrapper">
|
|||
|
|
<table>
|
|||
|
|
<thead>
|
|||
|
|
<tr>
|
|||
|
|
<th>订单号</th>
|
|||
|
|
<th>日期</th>
|
|||
|
|
<th>书名</th>
|
|||
|
|
<th>价格</th>
|
|||
|
|
<th class="highlight-col">购买者</th>
|
|||
|
|
<th class="highlight-col">电话</th>
|
|||
|
|
</tr>
|
|||
|
|
</thead>
|
|||
|
|
<tbody>
|
|||
|
|
<tr v-for="row in excelData" :key="row.id">
|
|||
|
|
<td>{{ row.id }}</td>
|
|||
|
|
<td>{{ row.date }}</td>
|
|||
|
|
<td>{{ row.book }}</td>
|
|||
|
|
<td>{{ row.price }}</td>
|
|||
|
|
<td class="highlight-cell">{{ row.user }}</td>
|
|||
|
|
<td class="highlight-cell">{{ row.phone }}</td>
|
|||
|
|
</tr>
|
|||
|
|
</tbody>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
<div class="note error">
|
|||
|
|
<p>❌ <strong>问题：</strong> "张三"的信息重复存储了 3 次。</p>
|
|||
|
|
<p>如果张三换了电话，你需要修改 3 行数据，很容易漏改！</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
<!-- DB Mode -->
|
|||
|
|
<div v-else class="db-view">
|
|||
|
|
<div class="db-layout">
|
|||
|
|
<!-- Users Table -->
|
|||
|
|
<div class="db-table users-table">
|
|||
|
|
<div class="table-title">用户表 (Users)</div>
|
|||
|
|
<table>
|
|||
|
|
<thead>
|
|||
|
|
<tr>
|
|||
|
|
<th>ID (主键)</th>
|
|||
|
|
<th>姓名</th>
|
|||
|
|
<th>电话</th>
|
|||
|
|
</tr>
|
|||
|
|
</thead>
|
|||
|
|
<tbody>
|
|||
|
|
<tr
|
|||
|
|
v-for="u in usersTable"
|
|||
|
|
:key="u.id"
|
|||
|
|
:class="{ active: hoveredUserId === u.id }"
|
|||
|
|
@mouseenter="setHover(u.id)"
|
|||
|
|
@mouseleave="setHover(null)"
|
|||
|
|
>
|
|||
|
|
<td>{{ u.id }}</td>
|
|||
|
|
<td>{{ u.name }}</td>
|
|||
|
|
<td>{{ u.phone }}</td>
|
|||
|
|
</tr>
|
|||
|
|
</tbody>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
<!-- Connection Lines (Visual only, simplified) -->
|
|||
|
|
<div class="connector">
|
|||
|
|
<div class="arrow">⬅️ 关联 (Join) ➡️</div>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
<!-- Orders Table -->
|
|||
|
|
<div class="db-table orders-table">
|
|||
|
|
<div class="table-title">订单表 (Orders)</div>
|
|||
|
|
<table>
|
|||
|
|
<thead>
|
|||
|
|
<tr>
|
|||
|
|
<th>订单号</th>
|
|||
|
|
<th>书名</th>
|
|||
|
|
<th>价格</th>
|
|||
|
|
<th class="highlight-col">用户 ID (外键)</th>
|
|||
|
|
</tr>
|
|||
|
|
</thead>
|
|||
|
|
<tbody>
|
|||
|
|
<tr
|
|||
|
|
v-for="o in ordersTable"
|
|||
|
|
:key="o.id"
|
|||
|
|
:class="{ active: hoveredUserId === o.user_id }"
|
|||
|
|
@mouseenter="setHover(o.user_id)"
|
|||
|
|
@mouseleave="setHover(null)"
|
|||
|
|
>
|
|||
|
|
<td>{{ o.id }}</td>
|
|||
|
|
<td>{{ o.book }}</td>
|
|||
|
|
<td>{{ o.price }}</td>
|
|||
|
|
<td class="highlight-cell">{{ o.user_id }}</td>
|
|||
|
|
</tr>
|
|||
|
|
</tbody>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="note success">
|
|||
|
|
<p>✅ <strong>优势：</strong> 订单表只存 "用户 ID"。</p>
|
|||
|
|
<p>
|
|||
|
|
鼠标悬停在某一行，看看它们是如何自动关联的。修改用户表一次，所有订单都会自动更新！
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</template>
|
|||
|
|
|
|||
|
|
<style scoped>
|
|||
|
|
.relational-demo {
|
|||
|
|
border: 1px solid #e4e7ed;
|
|||
|
|
border-radius: 8px;
|
|||
|
|
background: #fff;
|
|||
|
|
overflow: hidden;
|
|||
|
|
margin: 20px 0;
|
|||
|
|
font-family: sans-serif;
|
|||
|
|
}
|
|||
|
|
.tabs {
|
|||
|
|
display: flex;
|
|||
|
|
background: #f5f7fa;
|
|||
|
|
border-bottom: 1px solid #e4e7ed;
|
|||
|
|
}
|
|||
|
|
.tab {
|
|||
|
|
padding: 12px 24px;
|
|||
|
|
cursor: pointer;
|
|||
|
|
font-size: 14px;
|
|||
|
|
color: #606266;
|
|||
|
|
border-right: 1px solid #e4e7ed;
|
|||
|
|
transition: all 0.2s;
|
|||
|
|
}
|
|||
|
|
.tab.active {
|
|||
|
|
background: #fff;
|
|||
|
|
color: #409eff;
|
|||
|
|
font-weight: bold;
|
|||
|
|
border-bottom: 2px solid #409eff;
|
|||
|
|
margin-bottom: -1px;
|
|||
|
|
}
|
|||
|
|
.content-area {
|
|||
|
|
padding: 20px;
|
|||
|
|
}
|
|||
|
|
.table-wrapper {
|
|||
|
|
overflow-x: auto;
|
|||
|
|
}
|
|||
|
|
table {
|
|||
|
|
width: 100%;
|
|||
|
|
border-collapse: collapse;
|
|||
|
|
font-size: 13px;
|
|||
|
|
}
|
|||
|
|
th,
|
|||
|
|
td {
|
|||
|
|
border: 1px solid #ebeef5;
|
|||
|
|
padding: 8px 12px;
|
|||
|
|
text-align: left;
|
|||
|
|
}
|
|||
|
|
th {
|
|||
|
|
background: #fafafa;
|
|||
|
|
font-weight: bold;
|
|||
|
|
color: #303133;
|
|||
|
|
}
|
|||
|
|
.highlight-col {
|
|||
|
|
background: #ecf5ff;
|
|||
|
|
color: #409eff;
|
|||
|
|
}
|
|||
|
|
.highlight-cell {
|
|||
|
|
background: #f0f9eb;
|
|||
|
|
color: #67c23a;
|
|||
|
|
font-weight: bold;
|
|||
|
|
}
|
|||
|
|
.excel-view .highlight-cell {
|
|||
|
|
background: #fef0f0;
|
|||
|
|
color: #f56c6c;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
.db-layout {
|
|||
|
|
display: flex;
|
|||
|
|
gap: 20px;
|
|||
|
|
align-items: flex-start;
|
|||
|
|
flex-wrap: wrap;
|
|||
|
|
}
|
|||
|
|
.db-table {
|
|||
|
|
flex: 1;
|
|||
|
|
min-width: 280px;
|
|||
|
|
border: 1px solid #ebeef5;
|
|||
|
|
border-radius: 4px;
|
|||
|
|
overflow: hidden;
|
|||
|
|
}
|
|||
|
|
.table-title {
|
|||
|
|
background: #f2f6fc;
|
|||
|
|
padding: 8px 12px;
|
|||
|
|
font-weight: bold;
|
|||
|
|
font-size: 13px;
|
|||
|
|
color: #606266;
|
|||
|
|
border-bottom: 1px solid #ebeef5;
|
|||
|
|
}
|
|||
|
|
.connector {
|
|||
|
|
display: flex;
|
|||
|
|
align-items: center;
|
|||
|
|
justify-content: center;
|
|||
|
|
padding-top: 50px;
|
|||
|
|
font-size: 12px;
|
|||
|
|
color: #909399;
|
|||
|
|
}
|
|||
|
|
tr.active {
|
|||
|
|
background: #ecf5ff;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
.note {
|
|||
|
|
margin-top: 15px;
|
|||
|
|
padding: 12px;
|
|||
|
|
border-radius: 4px;
|
|||
|
|
font-size: 13px;
|
|||
|
|
line-height: 1.6;
|
|||
|
|
}
|
|||
|
|
.note.error {
|
|||
|
|
background: #fef0f0;
|
|||
|
|
color: #f56c6c;
|
|||
|
|
}
|
|||
|
|
.note.success {
|
|||
|
|
background: #f0f9eb;
|
|||
|
|
color: #67c23a;
|
|||
|
|
}
|
|||
|
|
</style>
|