mysql插入多條數據時間復雜度比較，mysql插入多條數據

mysql插入多條數據時間復雜度比較，mysql插入多條數據

• SQL腳本

select * from users;

• 方式一：

insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");
insert into users(name, age, course_id) VALUES("test",1, "0");

• 方式二：

insert into users(name, age, course_id) VALUES("test",1, "0"),("test",1, "0"),("test",1, "0"),("test",1, "0"),

("test",1, "0"),("test",1, "0"),("test",1, "0"),("test",1, "0"),
("test",1, "0"),("test",1, "0"),("test",1, "0"),("test",1, "0"),
("test",1, "0"),("test",1, "0"),("test",1, "0"),("test",1, "0"),
("test",1, "0"),("test",1, "0"),("test",1, "0"),("test",1, "0"),
("test",1, "0"),("test",1, "0"),("test",1, "0"),("test",1, "0")

• 時間損耗

在插入上面24條數據的時候發現兩者的執行效率相差比較大（近10倍的）

　　方式一：

　　方式二：

•  擴展：

那麼jdbc中的批處理的內部實現是不是采用方式二的形式來實現呢？感興趣的朋友可以查看下該部分的源碼...