39 lines
863 B
Markdown
39 lines
863 B
Markdown
+++
|
|
author = "FlintyLemming"
|
|
title = "数据库 insert into from 写到 values 里"
|
|
slug = "fa15f45394064c4db99e26f60de8411d"
|
|
date = "2020-05-31"
|
|
description = ""
|
|
categories = ["Coding"]
|
|
tags = ["SQL"]
|
|
+++
|
|
|
|
先来看个例子
|
|
|
|
Table1
|
|
No Name
|
|
1 Andy
|
|
2 Bob
|
|
3 Cathey
|
|
|
|
Table2
|
|
No Score(int)
|
|
1 85
|
|
2 98
|
|
3 95
|
|
|
|
在往 Table2 里写数据的话,最简单的可以这样:
|
|
|
|
```sql
|
|
insert into Table(No, Score) values ("1", 85);
|
|
insert into Table(No, Score) values ("2", 98);
|
|
insert into Table(No, Score) values ("3", 95);
|
|
```
|
|
|
|
那如果 Table2 中的 No 值想引用 Table 1 的值呢,除了在弄个临时表中转一下,也可以直接把 insert into from 写到 insert into values 里。比如第一条可以这样写:
|
|
|
|
```sql
|
|
insert into Table(No, Score) values ((select No from Table1 where NAME="Andy"), 85);
|
|
```
|
|
|
|
括号一定要加,这是一个小坑点。 |