Database query user mailbox

1938 · Query user mailbox

database

users Table records the user name (username)、 password (password) And mailbox (email), Now users "zhangsan" Log in by entering a user name and password
Please write SQL sentence , According to the user name (zhangsan) And password (zs789852), Query the user "zhangsan" The mailbox of .

The table definition : users ( User table )

Name	type	notes
username	varchar	user name ( Primary key )
password	varchar	User password
email	varchar	User mailbox

Tips ：
To return is username and email

Examples

Examples 1：

Table content : users

username	password	email
zhangsan	zs789852	[email protected]
lisi	ls654852	[email protected]
wanger	we951753	[email protected]
mazouri	mzr753951	[email protected]
xiangfeitian	xft159357	[email protected]

Running your SQL After statement , Table should return ：

username	email
zhangsan	[email protected]

Examples 2：

Table content : users

username	password	email
zhangsan	zs789852	[email protected]
lisi	ls654852	[email protected]
wanger	we951753	[email protected]

Running your SQL After statement , Table should return ：

username	email
zhangsan	[email protected]

 1. Create database

DROP DATABASE IF EXISTS judge;
CREATE DATABASE judge;
use judge;

DROP TABLE IF EXISTS users;

CREATE TABLE `users`(
    `username` VARCHAR(50) NOT NULL,
    `password` VARCHAR(16) NOT NULL,
    `email` VARCHAR(50) NOT NULL,
    PRIMARY KEY ( `username` )
);

2. insert data

 

3. Query data