mysql> select * from for_delete; +---+---+ | id | name | +---+---+ | 1 | A | | 2 | B | | 3 | C | +---+---+ 3 rows in set (0.00 sec) mysql> delete from for_delete; Query OK, 3 rows affected (0.04 sec) mysql> insert for_delete (name) values ('D'); ...
mysql> CREATE TABLE test_create_tab4 ( -> id INT PRIMARY KEY, -> val VARCHAR(10) NOT NULL, -> val2 INT -> CHECK(val2 >= 0 AND val2 <= 100) -> ); -> //Query OK, 0 rows affected (0.06 sec)mysql> INSERT INTO test_create_tab4(id, val2) VALUES(1, 100);...
7 创建完成后,可以看到Tables下名为"createtable"的表,如下图所示。 END
mysql> create table student( -> id int, -> name char(16), -> born_year year, -> birth date, -> study_time time, -> reg_time datetime -> ); Query OK, 0 rows affected (0.05 sec) mysql> insert into student values(1,'egon','2019','2019-05-09','11:11:00','2019-11-11 ...
3 rows in set (0.00 sec) mysql>DROP INDEX name_on_student ON student;#删除student表中的索引name_on_student Query OK, 0 rows affected (0.04 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql>CREATE INDEX name_on_student ON student (Name(5) DESC);#为student表以Name字段 ...
3 rows in set (0.00 sec) mysql> DROP INDEX name_on_student ON student;#删除student表中的索引name_on_student Query OK, 0 rows affected (0.04 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> CREATE INDEX name_on_student ON student (Name(5) DESC);#为student表以Name字段 ...
mysql测试语句 insert create http://www.weiruoyu.cn/?p=451 创建一个表 create table student(id int, name varchar(20),age int); 1. 添加数据 insert into student values (1,2,3);
There are two main ways to create a temporary table in MySQL: Basic temporary table creation. Temporary table creation from SELECT query. However, before we begin, we create a dummy dataset to work with. Here we create a table, student_details, along with a few rows in it. -- create ...
create table student(id int primary key,name varchar(20),age int);这样就可以了，把尖括号<>换成圆括号()就可以了。语法
外键列必须具有与主键列完全相同的数据类型和大小。如果不匹配,就会出现错误150。例如,在下面的代码中,Student表的外键列“Course_Id”的数据类型是INT(11),而Course表的主键列数据类型是VARCHAR(10)。 “`mysql CREATE TABLE Student ( Id int PRIMARY KEY, ...