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xuthus / 数据库SQL实战SQLMIT

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50.将employees表中的所有员工的last_name和first_name通过连接起来.md 678 Bytes
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xuthus authored 2019-08-12 23:23 . add:all

将employees表中的所有员工的last_name和first_name通过(')连接起来

题目描述

将employees表中的所有员工的last_name和first_name通过(')连接起来。

CREATE TABLE `employees` (
`emp_no` int(11) NOT NULL,
`birth_date` date NOT NULL,
`first_name` varchar(14) NOT NULL,
`last_name` varchar(16) NOT NULL,
`gender` char(1) NOT NULL,
`hire_date` date NOT NULL,
PRIMARY KEY (`emp_no`));

答案

select last_name || "'" || first_name name from employees

题解

牛客网OJ使用sqlite,无法使用concat进行字段拼接。MySQL格式:

select concat(last_name,'\'',first_name) name from employees

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