[MySQL/MSSQL] 1667. Fix Names in a Table

목차

문제

SQL Schema

Create table If Not Exists Users (user_id int, name varchar(40))
Truncate table Users
insert into Users (user_id, name) values ('1', 'aLice')
insert into Users (user_id, name) values ('2', 'bOB')

Table: Users

+----------------+---------+
| Column Name    | Type    |
+----------------+---------+
| user_id        | int     |
| name           | varchar |
+----------------+---------+
user_id is the primary key for this table.
This table contains the ID and the name of the user. The name consists of only lowercase and uppercase characters.

 

Write an SQL query to fix the names so that only the first character is uppercase and the rest are lowercase.

Return the result table ordered by user_id.

The query result format is in the following example.

 

Example 1:

Input: 
Users table:
+---------+-------+
| user_id | name  |
+---------+-------+
| 1       | aLice |
| 2       | bOB   |
+---------+-------+
Output: 
+---------+-------+
| user_id | name  |
+---------+-------+
| 1       | Alice |
| 2       | Bob   |
+---------+-------+

 

풀이

--MySql

# Write your MySQL query statement below
select
     user_id
    ,concat(upper(substr(name, 1, 1)), lower(substr(name, 2))) as name
    from Users
    order by user_id asc

--MSSQL

/* Write your T-SQL query statement below */
select 
     user_id
    ,concat(upper(substring(name, 1, 1)), lower(substring(name, 2, 40))) as name
    from Users
    order by user_id asc