当前位置:网站首页>[insert, modify and delete data in the headsong educator data table]
[insert, modify and delete data in the headsong educator data table]
2022-07-06 13:53:00 【Fu Ying ('▿')】
1、 Our mission : stay library Database reader Insert a piece of data into the data table
full name xm For Lin tuantuan , Phone number dhhm by 13507311234, The other fields take the default value
Display all data of the data table
use library;
# Code start
insert into reader (xm,dhhm) values(' Lin tuantuan ',13507311234);
select * from reader;
# Code end
2、 Our mission :
stay reader Insert a reader into the data table
The reader ID number is 2, The name is Chen Jie , Gender is female , Identity is teaching and research staff , The phone number is 13319551234
Tips :reader The order of each field in the data table is dzzh,xm,xb,sf,dhhm
use library;
# Code start
insert into reader (dzzh,xm,xb,sf,dhhm) values(2,' Chen Jie ',' Woman ',' academic staff ',13319551234);
# Code end
select * from reader;
3、 Our mission : stay reader Insert multiple pieces of data into the data table
The name is Huang Xiaoxiao , Gender is male , Identity is graduate , The phone is 13316789987
His name is Liu Daren , Gender is male , Identity is staff , Telephone 18012341234
The name is dengchaoyang , Gender is female , Identity is graduate , The phone is 17716554432
Tips : Data sheet reader The name of 、 Gender 、 identity 、 The phone number field is xm,xb,sf,dhhm
The reader ID is a self incrementing field , Its value will be automatically generated
use library;
# Code start
insert into reader (xm,xb,sf,dhhm) values(' Huang Xiaoxiao ',' male ',' Graduate student ',13316789987);
insert into reader (xm,xb,sf,dhhm) values(' Liu Daren ',' male ',' Personnel ',18012341234);
insert into reader (xm,xb,sf,dhhm) values(' Chao Yang Deng ',' Woman ',' Graduate student ',17716554432);
# Code end
select * from reader;
4、 Our mission : take reader Lin tuantuan in the data sheet xm The phone number of dhhm It is amended as follows 17718991989
use library;
# Code start
update reader set dhhm=17718991989 where xm=' Lin tuantuan ';
# Code end
select * from reader;
5、 Our mission : Modify the reader table reader Chen Jie xm The phone number of dhhm by 13315667745
As a staff member
use library;
# Code start
update reader set dhhm=13315667745,sf=' Personnel ' where xm=' Chen Jie ';
# Code end
select * from reader;
6、 Our mission : Put every reader reader Your reader card dzzh Number plus ten
use library;
# Code start
update reader set dzzh=dzzh+10;
# Code end
select * from reader;
7、 Our mission : Delete readers reader Chen Jie in the data sheet xm
use library;
# Code start
delete from reader where xm=' Chen Jie ';
# Code end
select * from reader;
8、 Our mission : Delete readers reader All graduate students in sf
use library;
# Code start
delete from reader where sf=' Graduate student ';
# Code end
select * from reader;
9、 Our mission : Delete all readers reader
use library;
# Code start
Truncate reader;
# Code end
select * from reader;
边栏推荐
- (原创)制作一个采用 LCD1602 显示的电子钟,在 LCD 上显示当前的时间。显示格式为“时时:分分:秒秒”。设有 4 个功能键k1~k4,功能如下:(1)k1——进入时间修改。
- Callback function ----------- callback
- Service ability of Hongmeng harmonyos learning notes to realize cross end communication
- FAQs and answers to the imitation Niuke technology blog project (II)
- 简述xhr -xhr的基本使用
- 实验九 输入输出流(节选)
- Record a penetration of the cat shed from outside to inside. Library operation extraction flag
- 撲克牌遊戲程序——人機對抗
- Beautified table style
- canvas基础1 - 画直线(通俗易懂)
猜你喜欢
canvas基础1 - 画直线(通俗易懂)
强化学习基础记录
Poker game program - man machine confrontation
(原创)制作一个采用 LCD1602 显示的电子钟,在 LCD 上显示当前的时间。显示格式为“时时:分分:秒秒”。设有 4 个功能键k1~k4,功能如下:(1)k1——进入时间修改。
Intensive literature reading series (I): Courier routing and assignment for food delivery service using reinforcement learning
Nuxtjs quick start (nuxt2)
Write a program to simulate the traffic lights in real life.
FAQs and answers to the imitation Niuke technology blog project (III)
ABA问题遇到过吗,详细说以下,如何避免ABA问题
仿牛客技术博客项目常见问题及解答(三)
随机推荐
Callback function ----------- callback
Mode 1 two-way serial communication is adopted between machine a and machine B, and the specific requirements are as follows: (1) the K1 key of machine a can control the ledi of machine B to turn on a
使用Spacedesk实现局域网内任意设备作为电脑拓展屏
Principles, advantages and disadvantages of two persistence mechanisms RDB and AOF of redis
PriorityQueue (large root heap / small root heap /topk problem)
The latest tank battle 2022 full development notes-1
Mixlab unbounded community white paper officially released
强化学习基础记录
3. Input and output functions (printf, scanf, getchar and putchar)
关于双亲委派机制和类加载的过程
C语言入门指南
Service ability of Hongmeng harmonyos learning notes to realize cross end communication
[during the interview] - how can I explain the mechanism of TCP to achieve reliable transmission
[modern Chinese history] Chapter 9 test
. How to upload XMIND files to Jinshan document sharing online editing?
[the Nine Yang Manual] 2019 Fudan University Applied Statistics real problem + analysis
Miscellaneous talk on May 14
FAQs and answers to the imitation Niuke technology blog project (II)
Canvas foundation 2 - arc - draw arc
String abc = new String(“abc“),到底创建了几个对象