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What are the additions, deletions, changes, and lookups in mysql? In response to this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more small partners who want to solve this problem find a simpler and easier way.

1. Create db_shop database, if the database does not exist, create it

create database if not exists db_shop;

2. Delete the database, if the data exists, delete it

drop database if exists db_shop;

Create a data table for db_shop

use db_shop;drop table if exists tb_goods;CREATE TABLE tb_goods( `goodsId` int(11) NOT NULL AUTO_INCREMENT, PRIMARY KEY (`tb_goods`));

4. Create a new table from the old table

create table tb_goods01 like tb_goods;

5. Delete data table

drop table tb_goods01;

Add a column to a table (one field)

alter tb_goods add column goodsName varchar(255) after goodsId;

Note: If you don't write after or before, you will add it to the end by default.

7. Delete fields

alter table tb_goods drop column goodsName;

8. Insert data

insert into tb_goods (goodsId,goodsName) values (1002,'goods1');

9. Inquiry

query all

select * from tb_goods;

query for specific

select goodsName fromtb_goods;

fuzzy lookup

select * from tb_goods like '% goods %';

10. Update Data Sheet

update tb_goods set goodsName ='commodity 2'; about mysql which add, delete, change, check the answer to the sentence problem shared here, I hope the above content can have some help to everyone, if you still have a lot of doubts not solved, you can pay attention to the industry information channel to learn more related knowledge.

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