MySQL是一個(gè)開源的關(guān)系型數(shù)據(jù)庫管理系統(tǒng),廣泛用于Web應(yīng)用程序的開發(fā)。在使用MySQL的過程中,一些常用的命令是必不可少的。本文將為您提供MySQL的常用命令大全,以便更高效地操作MySQL數(shù)據(jù)庫。
1. 連接數(shù)據(jù)庫 mysql -u root -p 2. 顯示數(shù)據(jù)庫 show databases; 3. 進(jìn)入數(shù)據(jù)庫 use database; 4. 顯示數(shù)據(jù)表 show tables; 5. 創(chuàng)建數(shù)據(jù)庫 create database database_name; 6. 刪除數(shù)據(jù)庫 drop database database_name; 7. 創(chuàng)建數(shù)據(jù)表 create table table_name(column_name data_type); 8. 刪除數(shù)據(jù)表 drop table table_name; 9. 插入數(shù)據(jù) insert into table_name(column_name) values(value); 10. 查詢數(shù)據(jù) select column_name from table_name where condition; 11. 更新數(shù)據(jù) update table_name set column_name = value where condition; 12. 刪除數(shù)據(jù) delete from table_name where condition; 13. 查看表結(jié)構(gòu) desc table_name; 14. 修改表結(jié)構(gòu) alter table table_name add column_name data_type; 15. 查看表中數(shù)據(jù)量 select count(*) from table_name; 16. 排序查詢 select column1,column2 from table_name order by column1 asc/desc; 17. 連表查詢 select column1, column2 from table_name1, table_name2 where condition; 18. 分組查詢 select column_name1, column_name2 from table_name group by column_name1; 19. 計(jì)算列總和 select sum(column_name) from table_name; 20. 計(jì)算列平均值 select avg(column_name) from table_name;
以上就是MySQL的常用命令大全,希望能對您在操作MySQL數(shù)據(jù)庫時(shí)提供幫助。