Update a table in MySQL and display only the initials name in a new column
To get the initial, use the concept of left() along with substring_index().
Let us create a table −
mysql> create table demo13
−> (
−> full_name varchar(100),
−> short_name varchar(20)
−> );
Query OK, 0 rows affected (1.18 sec)
Insert some records into the table with the help of insert command −
mysql> insert into demo13(full_name) values('John Smith');
Query OK, 1 row affected (0.27 sec)
mysql> insert into demo13(full_name) values('David Miller');
Query OK, 1 row affected (0.13 sec)
mysql> insert into demo13(full_name) values('Chris Brown');
Query OK, 1 row affected (0.28 sec)Display records from the table using select statement −
mysql> select *from demo13;
This will produce the following output −
+--------------+------------+
| full_name | short_name |
+--------------+------------+
| John Smith | NULL |
| David Miller | NULL |
| Chris Brown | NULL |
+--------------+------------+
3 rows in set (0.00 sec)
Following is the query to update table and get the initials name −
mysql> update demo13
−> set short_name= concat(
−> left(full_name, 1),
−> left(substring_index(full_name, ' ', −1), 1)
−> );
Query OK, 3 rows affected (0.14 sec)
Rows matched: 3 Changed: 3 Warnings: 0
Display records from the table using select statement −
mysql> select *from demo13;
This will produce the following output −
+--------------+------------+
| full_name | short_name |
+--------------+------------+
| John Smith | JS |
| David Miller | DM |
| Chris Brown | CB |
+--------------+------------+
3 rows in set (0.00 sec)
Published on 19-Nov-2020 15:46:54
