Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Combine two MySQL fields and update a third one with result?
Following is the syntax to combine two fields in MySQL −
alter table yourTableName add column yourColumnName dataType; update yourTableName set yourAddedColumnName =concat(yourColumnName1,' ',yourColumnName2);
Let us first create a table −
mysql> create table DemoTable1590 -> ( -> FirstName varchar(20), -> LastName varchar(20) -> ); Query OK, 0 rows affected (0.57 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1590 values('Adam','Smith');
Query OK, 1 row affected (0.45 sec)
mysql> insert into DemoTable1590 values('John','Doe');
Query OK, 1 row affected (0.42 sec)
mysql> insert into DemoTable1590 values('David','Miller');
Query OK, 1 row affected (0.16 sec)Display all records from the table using select statement −
mysql> select * from DemoTable1590;
This will produce the following output −
+-----------+----------+ | FirstName | LastName | +-----------+----------+ | Adam | Smith | | John | Doe | | David | Miller | +-----------+----------+ 3 rows in set (0.00 sec)
Following is the query to combine two MySQL fields and update third field after concatenation −
mysql> alter table DemoTable1590 add column FullName varchar(40); Query OK, 0 rows affected (0.54 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> update DemoTable1590 set FullName=concat(FirstName,' ',LastName); Query OK, 3 rows affected (0.56 sec) Rows matched: 3 Changed: 3 Warnings: 0
Let us check the table records once again −
mysql> select * from DemoTable1590;
This will produce the following output −
+-----------+----------+--------------+ | FirstName | LastName | FullName | +-----------+----------+--------------+ | Adam | Smith | Adam Smith | | John | Doe | John Doe | | David | Miller | David Miller | +-----------+----------+--------------+ 3 rows in set (0.00 sec)
Updated on: 16-Dec-2019
409 Views
Advertisements