--插入語句（新增）
--INSERT INTO 表名 ([欄位名1,欄位名2]) VALUES ('值'),('值'),('值')
INSERT INTO `student` (`name`) VALUES ('一葉知秋')
INSERT INTO student (`id`) VALUES (3)
INSERT INTO student (`id` ,`name`,`pwd`) VALUES (2,'夜雨聲煩','aaaaa')
INSERT INTO student (`sex`) VALUES ('男'),('男')
INSERT INTO student VALUES (6,'大漠孤煙
 
','bbbbbb','男','1999-09-02','[email protected]')

--修改  UPDATE
--UPDATE 表名 SET colnum_name = VALUE,[colnum_name = VALUE] WHERE [條件]
--不指定條件的情況下，會改動所有的資訊
UPDATE student SET `name` = '一槍穿雲' WHERE id=3
UPDATE student SET `name` = '沐雨橙風',`sex` = '女'WHERE id=4

UPDATE student SET `name` = '索克薩爾' WHERE pwd=123456
 
 AND sex='男'                

<>和這個！=都是不等於的意思

--刪除  DELETE
DELETE FROM student WHERE id=1

--DELETE 與 TRUNCATE 的區別
DELETE FROM student --不會影響自增
TRUNCATE TABLE `student`  --自增歸零