MySQL是最廣泛使用的關系型數據庫管理系統之一,它支持大量的機構和開發者,也有許多論壇和社區可供學習和交流。
本文總結了MySQL最常用的語法,旨在幫助初學者能夠快速上手,同時作為大家的備忘錄,從而更加高效地使用MySQL。
創建表
CREATE TABLE table_name ( column1 datatype constraints, column2 datatype constraints, column3 datatype constraints, ... );
插入數據
INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);
更新數據
UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition;
刪除數據
DELETE FROM table_name WHERE condition;
選擇數據
SELECT column1, column2, ... FROM table_name WHERE condition;
使用聚合函數
SELECT COUNT(column_name) FROM table_name WHERE condition; SELECT SUM(column_name) FROM table_name WHERE condition; SELECT AVG(column_name) FROM table_name WHERE condition; SELECT MIN(column_name) FROM table_name WHERE condition; SELECT MAX(column_name) FROM table_name WHERE condition;
排序
SELECT column1, column2, ... FROM table_name ORDER BY column1 ASC, column2 DESC;
聯結
SELECT column1, column2, ... FROM table1 INNER JOIN table2 ON condition;
上述內容是MySQL語法的精華部分,不過MySQL遠遠不止這些,如果您想學習更多MySQL的用法,可以去參考一些關于MySQL的書籍,或者通過在線交流論壇向經驗豐富的人請教。