溫馨提示×

基礎的mysql命令語句有哪些

小億
243
2023-07-28 16:41:57
欄目: 云計算

常見的MySQL命令語句包括:

  1. 創建數據庫:

CREATE DATABASE database_name;

  1. 刪除數據庫:

DROP DATABASE database_name;

  1. 使用數據庫:

USE database_name;

  1. 創建表:

CREATE TABLE table_name (

column1 datatype,

column2 datatype,

);

  1. 刪除表:

DROP TABLE table_name;

  1. 插入數據:

INSERT INTO table_name (column1, column2, …)

VALUES (value1, value2, …);

  1. 更新數據:

UPDATE table_name

SET column1 = value1, column2 = value2, …

WHERE condition;

  1. 刪除數據:

DELETE FROM table_name

WHERE condition;

  1. 查詢數據:

SELECT column1, column2, …

FROM table_name

WHERE condition;

  1. 排序數據:

SELECT column1, column2, …

FROM table_name

ORDER BY column1 ASC/DESC;

  1. 連接表:

SELECT column1, column2, …

FROM table1

INNER JOIN table2

ON table1.column_name = table2.column_name;

  1. 聚合函數:

SELECT COUNT(column_name)

FROM table_name

WHERE condition;

  1. 分組數據:

SELECT column1, COUNT(column2)

FROM table_name

GROUP BY column1;

  1. 修改表結構:

ALTER TABLE table_name

ADD column_name datatype;

  1. 創建索引:

CREATE INDEX index_name

ON table_name (column1, column2, …);

這些只是一些基礎的MySQL命令語句,實際使用中還有更多命令和語法可以掌握。

0
亚洲午夜精品一区二区_中文无码日韩欧免_久久香蕉精品视频_欧美主播一区二区三区美女