In SQL Server Management Studio
List the employees whose last names begin with an "L". Both first name and last name appear in the same column called employeename and the last name is the second word.
This is what I came up with but only works for first name since is the first word:
SELECT employeename
FROM employee_T
WHERE employeename LIKE 'L%'
So what can I add to make it work?
You can add a ' ' before the 'L%' meaning that it is after a previous words:
select employeename
from employee_T
where employeename LIKE ' L%'
This option won't work if you have records with more than 2 words
Or use substring by last index of ' ' and do Like on that
Or use this to get the last part of your name and compare to what you want:
select employeename
from employee_T
where SUBSTRING_INDEX(employeename, ' ', -1) LIKE 'L%'
Assuming every entry you want to match will look like this:
FirstName LastName
then all you need to do is add a space to your LIKE condition:
SELECT employeename
FROM employee_T
WHERE employeename LIKE ' L%'
If some of your data might only have a single name, or three names, then all bets are off for the above.
Related
I have a NAME column and the data is stored like this in a MySql database:
Doe,John P
I would like to break it out into FNAME LNAME MNAME and FULLNAME.
If I don't want to tamper with the SQL table, should I create a view?
I know how to fix it in PHP with a function but I would rather the processing be done on the database server than the application server.
This is what I have so far. I thinking I need a compound query or something similar.
SELECT Name
, SUBSTRING_INDEX(Name,',',-1) As FNAME
, SUBSTRING_INDEX(Name,',',1) As LNAME
, SUBSTRING_INDEX(Name,' ',1) As MNAME
FROM people;
I'm having trouble grabbing the middle name and doing what I think should be CONCAT function to get FULLNAME.
It would be great if there was a way (maybe a conditional) to handle names in the database that didn't have middle names. (i.e. DOE,JOHN).
A view is a fine way to get the results you want for future queries. The defining query would be:
SELECT Name, SUBSTRING_INDEX(SUBSTRING_INDEX(Name, ',', -1), ' ', 1) As FNAME,
SUBSTRING_INDEX(Name, ',', 1) As LNAME,
SUBSTRING_INDEX(Name, ' ', -1) As MNAME
FROM people;
This will work assuming that the format is exactly correct as you describe it in the table. Small changes -- such as no middle name or a space after the comma -- would make the syntax more complicated.
I'm trying to query the first letter of a last name in MySQL. I want to skip the first name and query the a certain letter in the last name. Thanks
In SKU_data, which SKU has a buyer whose last name begins with 'M'?
*/
select *
from sku_data
where buyer ;
In your where clause, search on WHERE buyer.LastName LIKE 'M%'. This will return all results that start with M.
You need to use a combination of the substring method and the substring_index method in your sql query.
Your select query should look something like this
SELECT SUBSTRING(last_name,1,1)
I'm assuming that your name field has both first and last name in it, instead of separate fields for first and last name. Use the substring_index method to figure out what last_name should be:
SUBSTRING_INDEX(full_name,' ',-1)
Combining this SQL, we have:
SELECT SUBSTRING(SUBSTRING_INDEX(buyer,' ',-1),1,1) as first_letter
Now you can use the first_letter field in a where clause to get your desired result:
SELECT *, SUBSTRING(SUBSTRING_INDEX(buyer,' ',-1),1,1) as first_letter
from sku_data
where first_letter = 'M' ;
Assuming that you have a field like say "full_name" which has first name and last name in the same column.
Lets say the full_name in table employee has a value "JEFF MOSTI"
You can simply use the following statement to get what you need
select * from employee where full_name regexp ' M';
I am assuming you are looking for the last name to start with 'M' and that there is a space (' ') between the first and last name.
So the search would be like 'Ozzie Smith'
First table has (username, fname, lname) = osmith, ozzie, smith
Second table has (username, team) = osmith, cardinals
I need to concat the first and last name columns from the first table join it by username on the second table and return the team name.
I have been trying and trying...brain melted. I need your help!
Thanks!
Since it's MySQL, you need to use CONCAT, not the + sign. I also added a LOWER() function to avoid capital letter mismatch problem :
select team
from table1
join table2 on table2.username = table1.username
where lower(concat(fname,' ',lname)) like lower('%Ozzie Smith%')
You're probably doing something like
WHERE fname LIKE '%Ozzie Smith%'
which will not work. fname will contain only Ozzie, and will never match against Ozzie Smith. It would also not match if the user enters Smith, Ozzie, or any other dual-name variant. You'll have to preprocess the search terms and do something like
WHERE (fname LIKE '%Ozzie%') or (fname LIKE '%Smith%')
OR (lname LIKE '%ozzie%') or (lname LIKE %Smith%')
This will get VERY painful as the number of search terms and fields being search goes up. You'd be better off using a FULLTEXT index, where it'll be a simple matter of
WHERE MATCH(fname, lname) AGAINST ('Ozzie Smith')
Why doesn't this work?
select
lname + ', ' + fname as playerName
, team as teamName
from table1
join table2 on table2.username = table1.username
Update:
where (fname + ' ' + lname) like '%Ozzie Smith%'
I was wondering if you have two columns for lets say
first name.
last name.
what you store in the database.
Can you create a 'dynamic' column 'fullname' in the database that automatically creates the name out of the first and last name?
firstname |lastname |fullname (this goes automatically)
-----------------------------------------
foo |bar |foo bar
If you just want to select the full name, you can do just that:
select concat(firstname, ' ', lastname) as fullname from users
If you actually want a column (i.e. be able to perform updates against it), then it's not possible, AFAIK.
You can try something like this:
SELECT CONCAT(firstname, ' ', lastname) as firstlast FROM users
This one also makes sure that no empty spaces are added:
SELECT IF(ISNULL(firstname), lastname, CONCAT(firstname, ' ', lastname)) AS fullname FROM users
In my table I store first name in the fName column and last name in the lName column, now I need to search them with a query, but I don't know the SQL!
example
lName | fName
-----------------
Tendulkar| Sachin
Ganguly | Sourav
Khan | Zaheer
Dhoni | Mahendra Singh
The user should get MAHENDRA SINGH DHONI if he searches for Mahendra Dhoni!
select concat(fName,' ',lName) fullname
from tbl
where concat(' ',fName,' ',lName,' ') like '% Mahendra %'
and concat(' ',fName,' ',lName,' ') like '% dhoni %'
This will most certainly put to rest any hopes of a well performing query
A variation on the theme
select concat(fName,' ',lName) fullname
from tbl
where (concat(fName,' ',lName) like '%Mahendra%dhoni%'
or concat(lName,' ',fName) like '%Mahendra%dhoni%')
The 2nd version doesn't care about full part matching, e.g. dhoni will match madhonie
Both of these queries find the name correctly. Note that there are % before and after the name to match, as well as % for every space in the name.
create table tbl (fname varchar(100), lname varchar(100));
insert tbl select 'Mahendra singh', 'dhoni';
select concat(fName,' ',lName) fullname
from tbl
where (concat(fName,' ',lName) like '%Mahendra%dhoni%'
or concat(lName,' ',fName) like '%Mahendra%dhoni%');
select concat(fName,' ',lName) fullname
from tbl
where (concat(fName,' ',lName) like '%dhoni%Mahendra%'
or concat(lName,' ',fName) like '%dhoni%Mahendra%');
You are not clear on the nature of the search inputs and specifically the level of flexibility. First, is the user given two boxes for first and last name or only a single search box? If the former, then the fast solution would be:
Select concat( fname, ' ', lname)
From MyTable
Where lname Like 'dhoni%'
And fname Like 'mahendra%'
The above query only searches for where the first part of the column value begins with the search values. However, if the user can type anything into a single search box, that is harder. If it is presumed that the user has typed <name part> space <name part>, then one solution that solves that specific problem where the user enters only two words is to split on the space and run something like:
Select concat( fname, ' ', lname)
From MyTable
Where ( lname Like '%dhoni%' And fname Like '%mahendra%' )
Or ( lname Like '%mahendra%' And fname Like '%dhoni%' )
However, that query will perform awful because it forces the system to scan the entire table each time it is executed. Further, what happens when they enter a three part name like Mahendra Singh Dhoni in your search? There are simply too many edge cases for this to be workable IMO. The right solution is to get a full text indexing engine like Lucene that will create a index across both columns and rank the quality of the match.
Lucene
I'm guessing your inputs are from two different textboxes, and hopefully you are using a stored procedure :).
declare #input1 nvarchar(50)
declare #input2 nvarchar(5)
set #input1 = 'Mahendra'
set #input2 = 'Dhoni'
select upper((fname + ' ' + lname)) as 'FullName'
from customer
where fname like '%' + #input1 + '%'
or fname like '%' + #input1 + '%'
or lname like '%' + #input2 + '%'
or lname like '%' + #input2 + '%'
If you have 1 input box, you will want to split your search term by the space and loop over your search terms against fname and lname columns using the like '%term%' syntax.
Another way would be to make a stored procedure that added fname and lname together and did a soundex match. this is where you match your search term against the sound of the word in the table. Google it should help, its pretty easy.
I am assuming you have 2 inputs and you are only getting part of the first name. If this is true then the following would work:
select concat(fname, ' ', lname)
from yourtable
where substring(fname, 1, 5) = 'mahen'
and lname = 'dhoni'
The advantage of this approach is that it will use the indexes on the column(s) or a combined index whereas the like queries always do full table scans.
You might also check out a search engine like sphinx or solr when you truly do not know the data you are receiving as those are far more flexible that database queries.