Splitting name column with multiple delimiters - mysql

I'm trying to split a name column (fullname) with the format lastname, firstname into two separate columns in MySQL using:
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(fullname, ',', 1), ' ', -1) as firstname, SUBSTRING_INDEX(SUBSTRING_INDEX(fullname, ',', 2), ' ', -1) as lastname FROM tablename;
This works on most names. However, a name like "Del Torres Jr, Marcelo" shows up as
--------------------
lastname | firstname
--------------------
JR | Marcelo
--------------------
How to I need to alter my statement to capture all of a name after the comma?


Can you not just use:
SELECT SUBSTRING_INDEX(fullname, ',', 1) AS firstname
,SUBSTRING_INDEX(fullname, ',', -1) AS lastname
FROM table
SQLFiddle
I can't tell what you're trying to do with the match against ' ' but if you're just trying to trim whitespace you can use TRIM() on those values.


is this what you want ?
SELECT
SUBSTRING_INDEX(value, ' ,', 1) as lastname ,
SUBSTRING_INDEX(value, ' ,', -1) as firstname
FROM event;
demo
and in your query you should change -1 to 1 like that
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(fullname,',', 1),' ', -1) as firstname,
SUBSTRING_INDEX(SUBSTRING_INDEX(fullname,',', 2),' ', 1) as lastname
^--this should be 1
FROM tablename;

Related

Change position of last name and rest of name in MySQL query

My 'name' column has names stored like this
Lastname Firstname Middlename
I want to display it like this in my query:
Firstname Middlename Lastname
Not all records have a middle name, so they may be 1 or 2 spaces in the column
I have tried this :
SELECT CONCAT ( SUBSTRING_INDEX(`name`, ' ', 1) , ' ' , SUBSTRING_INDEX(`name`, ' ', -1) ) AS nicename`
But this only gives the last name. The "-1" part is not working...
Thanks for all help.

To start with, that's a bad design, Now, since your middlename part may be empty, you may bear with it and just select the name saying select name from tbl1.
Else, consider re-designing your table to have separate columns for Lastname, Firstname and Middlename and then You don't need all of this. You can just get data from all 3 columns saying
select concat(Firstname, Middlename, Lastname ) as nicename
from tbl1;

Found a solution :
SELECT concat ( TRIM( SUBSTR(`name`, LOCATE(' ', `name`)) ), ' ', SUBSTRING_INDEX(SUBSTRING_INDEX(`name`, ' ', 1), ' ', -1) ) as nicename
Source: How to split the name string in mysql?

Extract email id from a field having multiple words in mysql

I have a table in mysql -mytable.
Column Name:ResidenceAddress1
It has values like this:
sap3200#gmail.com,Rourkela
sap3212#gmail.com 2nd street,7 hils
2nd street, sap3212#gmail.com
I've tried this way:
select (case when substring_index(Residence_Address1, ' ', 1) like '%#%'
then substring_index(Residence_Address1, ' ', 1)
else substring_index(Residence_Address1, ' ', -1)
end) as email, Residence_Address1
from mytable
where Residence_Address1 like '%gmail%' and Email_Personal1=""
But its not giving me only email ids. How do I get only email ids from multiple words?

For your sample data, here is a solution:
select
concat(trim(substring_index(substring_index(ResidenceAddress1, '#', '1'), ' ', -1)), '#gmail.com') as mail
,ResidenceAddress1
from mytable
This answer is based on your email is all gmail.com and your separator is space.
Edited:
substring_index(ResidenceAddress1, '#', '1') will get you this:
sap3200
sap3212
2nd street, sap3212
then
substring_index('sap3200', ' ', -1) => sap3200
substring_index('sap3212', ' ', -1) => sap3212
substring_index('2nd street, sap3212', ' ', -1) => sap3212
Demo Here

Is there a way for switch 2 words in MySQL row field

I would want to switch 2 words (firstName lastName) in a mysql row's fields
example :
I have a column 'persons' with a field :
Jonh Smith
I would want to switch to : Smith Jonh
I searched a lot for a MySQL function or snippet but found no way.

Try this update if the field has only two words
UPDATE tablename
SET persons = CONCAT(SUBSTRING_INDEX(SUBSTRING_INDEX(persons, ' ', 2), ' ', -1),' ',
SUBSTRING_INDEX(SUBSTRING_INDEX(persons, ' ', 1), ' ', -1))

Splitting a single column (name) into two (forename, surname) in SQL

Currently I'm working on a database redesign project. A large bulk of this project is pulling data from the old database and importing it into the new one.
One of the columns in a table from the old database is called 'name'. It contains a forename and a surname all in one field (ugh). The new table has two columns; forenames and surname. I need to come up with a clean, efficient way to split this single column into two.
For now I'd like to do everything in the same table and then I can easily transfer it across.
3 columns:
Name (the forename and surname)
Forename (currently empty, first half of name should go here)
Surname (currently empty, second half of name should go here)
What I need to do: Split name in half and place into forename and surname
If anyone could shed some light on how to do this kind of thing I would really appreciate it as I haven't done anything like this in SQL before.
Database engine: MySQL
Storage engine: InnoDB

A quick solution is to use SUBSTRING_INDEX to get everything at the left of the first space, and everything past the first space:
UPDATE tablename
SET
Forename = SUBSTRING_INDEX(Name, ' ', 1),
Surname = SUBSTRING_INDEX(Name, ' ', -1)
Please see fiddle here. It is not perfect, as a name could have multiple spaces, but it can be a good query to start with and it works for most names.

Try this:
insert into new_table (forename, lastName, ...)
select
substring_index(name, ' ', 1),
substring(name from instr(name, ' ') + 1),
...
from old_table
This assumes the first word is the forename, and the rest the is lastname, which correctly handles multi-word last names like "John De Lacey"

For the people who wants to handle fullname: John -> firstname: John, lastname: null
SELECT
if( INSTR(`name`, ' ')=0,
TRIM(SUBSTRING(`name`, INSTR(`name`, ' ')+1)),
TRIM(SUBSTRING(`name`, 1, INSTR(`name`, ' ')-1)) ) first_name,
if( INSTR(`name`, ' ')=0,
null,
TRIM(SUBSTRING(`name`, INSTR(`name`, ' ')+1)) ) last_name
It works fine with John Doe. However if user just fill in John with no last name, SUBSTRING(name, INSTR(name, ' ')+1)) as lastname will return John instead of null and firstname will be null with SUBSTRING(name, 1, INSTR(name, ' ')-1).
In my case I added if condition check to correctly determine lastname and trim to prevent multiple spaces between them.

This improves upon the answer given, consider entry like this "Jack Smith Smithson", if you need just first and last name, and you want first name to be "Jack Smith" and last name "Smithson", then you need query like this:
-- MySQL
SELECT
SUBSTR(full_name, 1, length(full_name) - length(SUBSTRING_INDEX(full_name, ' ', -1)) - 1) as first_name,
SUBSTRING_INDEX(full_name, ' ', -1) as last_name
FROM yourtable

Just wanted to share my solution. It also works with middle names. The middle name will be added to the first name.
SELECT
TRIM(SUBSTRING(name,1, LENGTH(name)- LENGTH(SUBSTRING_INDEX(name, ' ', -1)))) AS firstname,
SUBSTRING_INDEX(name, ' ', -1) AS lastname

I had a similar problem but with Names containing multiple names, eg. "FirstName MiddleNames LastName" and it should be "MiddleNames" and not "MiddleName".
So I used a combo of substring() and reverse() to solve my problem:
select
SystemUser.Email,
SystemUser.Name,
Substring(SystemUser.Name, 1, instr(SystemUser.Name, ' ')) as 'First Name',
reverse(Substring(reverse(SystemUser.Name), 1, instr(reverse(SystemUser.Name), ' '))) as 'Last Name',
I do not need the "MiddleNames" part and maybe this is not the most efficient way to solve it, but it works for me.

Got here from google, and came up with a slightly different solution that does handle names with more than two parts (up to 5 name parts, as would be created by space character). This sets the last_name column to everything to the right of the 'first name' (first space), it also sets full_name to the first name part. Perhaps backup your DB before running this :-) but here it is it worked for me:
UPDATE users SET
name_last =
CASE
WHEN LENGTH(SUBSTRING_INDEX(full_name, ' ', 1)) = LENGTH(full_name) THEN ''
WHEN LENGTH(SUBSTRING_INDEX(full_name, ' ', 2)) = LENGTH(full_name) THEN SUBSTRING_INDEX(del_name, ' ', -1)
WHEN LENGTH(SUBSTRING_INDEX(full_name, ' ', 3)) = LENGTH(full_name) THEN SUBSTRING_INDEX(del_name, ' ', -2)
WHEN LENGTH(SUBSTRING_INDEX(full_name, ' ', 4)) = LENGTH(full_name) THEN SUBSTRING_INDEX(del_name, ' ', -3)
WHEN LENGTH(SUBSTRING_INDEX(full_name, ' ', 5)) = LENGTH(full_name) THEN SUBSTRING_INDEX(del_name, ' ', -4)
WHEN LENGTH(SUBSTRING_INDEX(full_name, ' ', 6)) = LENGTH(full_name) THEN SUBSTRING_INDEX(del_name, ' ', -5)
ELSE ''
END,
full_name = SUBSTRING_INDEX(full_name, ' ', 1)
WHERE LENGTH(name_last) = 0 or LENGTH(name_last) is null or name_last = ''

SUBSTRING_INDEX didn't work for me in SQL 2018, so I used this:
declare #fullName varchar(50) = 'First Last1 Last2'
declare #first varchar(50)
declare #last varchar(50)
select #last = right(#fullName, len(#fullName)-charindex(' ',#fullName, 1)), #first = left(#fullName, (charindex(' ', #fullName, 1))-1);
Yields #first = 'First', #last = 'Last1 Last2'

How do I add the results of a MySQL query which splits a column into two to a table?

I am running the following query on a table, which splits the first name and last name of each person in the Name column of the table into Firstname and Lastname:
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(Name, ' ', 1), ' ', -1) as Firstname,
SUBSTRING_INDEX(SUBSTRING_INDEX(Name, ' ', 2), ' ', -1) as Lastname
FROM conference;
This works fine. I would now like to add the results of this to two new columns in the table which I have called Firstname and Lastname.
I tried adding INSERT conference [Firstname, Lastname] to the start of the Query, but that generated an error. Could someone help with the correct way of doing this?
Thanks,
Nick

If your intent is to update existing rows with those new fields instead of inserting new records, this should work
UPDATE Conference
SET
Firstname = SUBSTRING_INDEX(SUBSTRING_INDEX(Name, ' ', 1), ' ', -1),
Lastname = SUBSTRING_INDEX(SUBSTRING_INDEX(Name, ' ', 2), ' ', -1)

have you tried:
select SUBSTRING_INDEX(SUBSTRING_INDEX(Name, ' ', 1), ' ', -1) as Firstname,
SUBSTRING_INDEX(SUBSTRING_INDEX(Name, ' ', 2), ' ', -1) as Surname
into conference
from conference