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xuthus / 数据库SQL实战SQLMIT

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32.将employees表的所有员工的last_name和first_name拼接起来作为Name.md 636 Bytes
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xuthus authored 2019-08-12 23:23 . add:all

将employees表的所有员工的last_name和first_name拼接起来作为Name

题目描述

将employees表的所有员工的last_name和first_name拼接起来作为Name,中间以一个空格区分

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

MySQL语法:

select concat(last_name," ",first_name) Name from employees

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