select student.name,student.score from student;下面我们在SQL练习网站上测试一下我们的结果，首先进入测试网站SQL Fiddle 然后新建SQL表，最后写入执行语句。
SELECT LastName,FirstName INTO Persons_backup FROM Persons SQL SELECT INTO 实例 - 带有 WHERE 子句 我们也可以添加 WHERE 子句。下面的例子通过从 "Persons" 表中提取居住在 "Beijing" 的人的信息，创建了一个带有两个列的名为 "Persons_backup" 的表：SELECT LastName,Firstname INTO Persons_backup FROM ...
mysql> select p.firstname, p.lastname, f.history from Persons as p JOIN Family as f ON p.lastName = f.lastName ORDER BY f.history; 解析:Persons INNER JOIN Family ON p.lastName = f.lastName 完全等同于 select Persons, Family where p.lastName = f.lastName 其核心思想是: 找到 两个...
A.SELECT*FROMPersonsWHEREFirstNameLIKE'Thomas'ANDLastNameLIKE'Carter';B.SELECTFirstName='Thomas',LastName='Carter'FROMPersons;C.SELECT*FROMPersonsWHEREFirstName='Thomas'ANDLastName='Carter'; 相关知识点: 试题来源: 解析 C 反馈 收藏
SELECT LastName,Firstname INTO Persons_backup FROM Persons WHERE City='Beijing'实例 从一个以上的表中选取数据也是可以做到的。下面的例子会创建一个名为 "Persons_Order_Backup" 的新表，其中包含了从 Persons 和 Orders 两个表中取得的信息：SELECT Persons.LastName,Orders.OrderNo INTO Persons_Order_...
SELECT column_name(s) INTO new_table_name [IN externaldatabase] FROM old_tablename SQL SELECT INTO 实例 - 制作备份复件 下面的例子会制作 "Persons" 表的备份复件: SELECT * INTO Persons_backup FROM Persons IN 子句可用于向另一个数据库中拷贝表: ...
A. SELECT * FROM Persons WHERE FirstName LIKE 'Thomas' AND LastName LIKE 'Carter' B. SELECT FirstName='Thomas', LastName='Carter' FROM Persons C. SELECT * FROM Persons WHERE FirstName='Thomas' AND LastName='Carter' D. SELECT * FROM Persons WHERE FirstName='Thomas' OR LastName='...
选择EmployeeID, LastName, FirstName 相关内容 a刘凡齐 Liu Fanqi [translate] aCity, State Zip 城市,状态邮编 [translate] a重新开始 走自己的路 [translate] a希望你今天不会很忙 Hoped you cannot be very busy today [translate] a可是,今天奢侈品的范围远远超出了当初意大利人给它的定义,有着更为深刻...
2.SELECT INTO FROM语句 语句形式为:SELECT vale1, value2 into Table2 from Table1 要求目标表Table2不存在,因为在插入时会自动创建表Table2,并将Table1中指定字段数据复制到Table2中。示例如下: view plaincopy to clipboardprint? --1.创建测试表