I'm trying to make a search feature that will search multiple columns to find a keyword based match. This query:
SELECT title FROM pages LIKE %$query%;
works only for searching one column, I noticed separating column names with commas results in an error. So is it possible to search multiple columns in mysql?
If it is just for searching then you may be able to use CONCATENATE_WS.
This would allow wild card searching.
There may be performance issues depending on the size of the table.
SELECT *
FROM pages
WHERE CONCAT_WS('', column1, column2, column3) LIKE '%keyword%'
You can use the AND or OR operators, depending on what you want the search to return.
SELECT title FROM pages WHERE my_col LIKE %$param1% AND another_col LIKE %$param2%;
Both clauses have to match for a record to be returned. Alternatively:
SELECT title FROM pages WHERE my_col LIKE %$param1% OR another_col LIKE %$param2%;
If either clause matches then the record will be returned.
For more about what you can do with MySQL SELECT queries, try the documentation.
If your table is MyISAM:
SELECT *
FROM pages
WHERE MATCH(title, content) AGAINST ('keyword' IN BOOLEAN MODE)
This will be much faster if you create a FULLTEXT index on your columns:
CREATE FULLTEXT INDEX fx_pages_title_content ON pages (title, content)
, but will work even without the index.
1)
select *
from employee em
where CONCAT(em.firstname, ' ', em.lastname) like '%parth pa%';
2)
select *
from employee em
where CONCAT_ws('-', em.firstname, em.lastname) like '%parth-pa%';
First is usefull when we have data like : 'firstname lastname'.
e.g
parth patel
parth p
patel parth
Second is usefull when we have data like : 'firstname-lastname'. In it you can also use special characters.
e.g
parth-patel
parth_p
patel#parth
Here is a query which you can use to search for anything in from your database as a search result ,
SELECT * FROM tbl_customer
WHERE CustomerName LIKE '%".$search."%'
OR Address LIKE '%".$search."%'
OR City LIKE '%".$search."%'
OR PostalCode LIKE '%".$search."%'
OR Country LIKE '%".$search."%'
Using this code will help you search in for multiple columns easily
SELECT * FROM persons WHERE (`LastName` LIKE 'r%') OR (`FirstName` LIKE 'a%');
Please try with above query.
Related
I have a table vehicles has a column 'name'
Values are stored like car/tesla, car/honda, truck/daimler (each value is stored as type/brand)
I want to query the table using only brand. If I look up tesla, it should return the row corresponding to car/tesla. How do I do it? I'm using postgres.
There is no need in regex in your case. Just use old good like:
select name
from vehicles
where name like '%/tesla'
2 solutions are available a select query with LIKE operand or a select query with contains operand.
select * from vehicles where name LIKE '%tesla%'
Select * from vehicles where Contains(name, "tesla");
How does wildcards works in sql. If I do select * from table it give all the fields. But if I do select a* from table it gives error. Shouldn't it give all fields which begins with a?
I am little confused.
SELECT * FROM tableName literally means "select all columns from tableName".
Philip Graham is right about his answer where he asked to use a.*
Wildcards help you search for strings about which you are not sure. These are almost always used with the LIKE keyword and put in WHERE clauses or searched CASE statements.
There are two wildcard characters - % and _.
% is used to find any string of 0 or more length.
E.g.,
SELECT firstName
FROM persons
WHERE UPPER(firstName) LIKE 'J%'
This will return all the firstName from the persons table where firstname starts with letter J. This would return "Jason", "James", "Josh", "Jessica" and much more.
Note that UPPER function was used to eliminate case sensitivity.
Next, you can have an _ character that looks for the presence of one single character.
SELECT firstName
FROM persons
WHERE UPPER(firstName) LIKE 'J_M__'
This would return "James", "Jimmy", "Jamos", "Jxmx" and filter away any "Jason", "Jaguar", etc.
For more info click here
You can use a.* where a is the name of the table. For instance in
select a.* from a left join b on a.id = b.id
You would return only the fields from a but not from b
If want to use a wild card in SQL, You need to key on the column that you want to filter using LIKE.
SELECT *
FROM table
WHERE column_name LIKE 'a%';
This will give you everything that begins with 'a' on that column.
If you don't want all the columns, you must explicitly give the name of each column that you want in the query.
SELECT LastName, FirstName, Address
FROM table
So if you want all the fields that begin with 'a' you must name all the fields that begin with 'a' in the SELECT statement.
Hope this helps.
I am trying to implement an AutoComplete search box(like google) using SQL Server 2008 and Full Text Search.
Say I have 3 columns that I want to search across and have created the proper indexes and what not.
The columns are ProductName, ProductNumber, and Color...
For the user input I want to search for possible matches across all three columns and suggest the proper search term.
So say the user starts typing "Bl"
id like to return a single column containtng results like "Black" "Blue" which come from the Color column and also any matches from the other two columns(like ProductNumber: BL2300)
So basically I need to search across multiple columns and return a single column as the result. Is there a way to do this?
UPDATED follwoing comment of op If you created a FULLTEXT INDEX on different columns, then you can simple use CONTAINS or FREETEXT to look on one of them, all of them, or some of them. Like this:
SELECT *
FROM YourTable
WHERE CONTAINS(*, #SearchTerm);
If you want to look on all the columns that are included in the FULLTEXT INDEX. or:
SELECT *
FROM YourTable
WHERE CONTAINS((ProductName, ProductNumber, Color), #SearchTerm);
If you want to specify the columns that you want to search.
If you need the results in one column, you are gonna have to do a UNION and do a search for every column you want to be searched.
SELECT *
FROM YourTable
WHERE CONTAINS(ProductName, #SearchTerm)
UNION
SELECT *
FROM YourTable
WHERE CONTAINS(ProductNumber, #SearchTerm)
UNION
SELECT *
FROM YourTable
WHERE CONTAINS(Color, #SearchTerm)
If you do not need to associate the single columns, something like
SELECT * FROM Table WHERE ProductName LIKE #SearchTerm + '%'
UNION
SELECT * FROM Table WHERE ProductNumber LIKE #SearchTerm + '%'
UNION
SELECT * FROM Table WHERE Color LIKE #SearchTerm + '%'
is a good point to start from.
I'm using the below query to return results from a table using Full-Text-Search.
In SQL2000 it was only possible to search one or all columns in a table. Is it possible in SQL 2008?
I would like to search two tables, Problem and Solution (Both indexed and in the same table):
DECLARE #topRank int set #topRank=(SELECT MAX(RANK)
FROM FREETEXTTABLE([Support_Calls], Problem, 'test', 1))
SELECT [ID] AS [Call No],Company_Name, Problem, Solution, CONVERT(VARCHAR(20),CAST((CAST(ftt.RANK as DECIMAL)/#topRank * 100) AS DECIMAL(13,0))) + '%' as Match
FROM [Support_Calls] INNER JOIN FREETEXTTABLE([Support_Calls], Problem, 'test') as ftt ON ftt.[KEY]=[ID] ORDER BY ftt.RANK DESC;
From what I can see the FREETEXTTABLE does not accept more than one column?
You specify them in parentheses; FREETEXTTABLE(tablename, (col1,col2,col3), 'expr') or use an asterisk to seach all columns in the index.
From MSDN,
Returns a table of zero, one, or more rows for those columns containing character-based data types for values that match the meaning, but not the exact wording, of the text in the specified freetext_string. FREETEXTTABLE can only be referenced in the FROM clause of a SELECT statement like a regular table name.
Queries using FREETEXTTABLE specify freetext-type full-text queries that return a relevance ranking value (RANK) and full-text key (KEY) for each row.
They give the following syntax:
FREETEXTTABLE (table , { column_name | (column_list) | * }
,'freetext_string'
[ , LANGUAGE language_term ]
[ ,top_n_by_rank ] )
So yes, what Alex K. said as well.
If you created a FULLTEXT INDEX on different columns, then you can simple use CONTAINS or FREETEXT to look on one of them, all of them, or some of them. Like this:
SELECT *
FROM YourTable
WHERE CONTAINS(*, #SearchTerm);
If you want to look on all the columns that are included in the FULLTEXT INDEX. or:
SELECT *
FROM YourTable
WHERE CONTAINS((ProductName, ProductNumber, Color), #SearchTerm);
If you want to specify the columns that you want to search. If you need the results in one column, you are gonna have to do a UNION and do a search for every column you want to be searched.
SELECT *
FROM YourTable
WHERE CONTAINS(ProductName, #SearchTerm)
UNION
SELECT *
FROM YourTable
WHERE CONTAINS(ProductNumber, #SearchTerm)
UNION
SELECT *
FROM YourTable
WHERE CONTAINS(Color, #SearchTerm)
I am trying to find a way, if possible, to use IN and LIKE together. What I want to accomplish is putting a subquery that pulls up a list of data into an IN statement. The problem is the list of data contains wildcards. Is there any way to do this?
Just something I was curious on.
Example of data in the 2 tables
Parent table
ID Office_Code Employee_Name
1 GG234 Tom
2 GG654 Bill
3 PQ123 Chris
Second table
ID Code_Wildcard
1 GG%
2 PQ%
Clarifying note (via third-party)
Since I'm seeing several responses which don't seems to address what Ziltoid asks, I thought I try clarifying what I think he means.
In SQL, "WHERE col IN (1,2,3)" is roughly the equivalent of "WHERE col = 1 OR col = 2 OR col = 3".
He's looking for something which I'll pseudo-code as
WHERE col IN_LIKE ('A%', 'TH%E', '%C')
which would be roughly the equivalent of
WHERE col LIKE 'A%' OR col LIKE 'TH%E' OR col LIKE '%C'
The Regex answers seem to come closest; the rest seem way off the mark.
I'm not sure which database you're using, but with Oracle you could accomplish something equivalent by aliasing your subquery in the FROM clause rather than using it in an IN clause. Using your example:
select p.*
from
(select code_wildcard
from second
where id = 1) s
join parent p
on p.office_code like s.code_wildcard
In MySQL, use REGEXP:
WHERE field1 REGEXP('(value1)|(value2)|(value3)')
Same in Oracle:
WHERE REGEXP_LIKE(field1, '(value1)|(value2)|(value3)')
Do you mean somethign like:
select * FROM table where column IN (
SELECT column from table where column like '%%'
)
Really this should be written like:
SELECT * FROM table where column like '%%'
Using a sub select query is really beneficial when you have to pull records based on a set of logic that you won't want in the main query.
something like:
SELECT * FROM TableA WHERE TableA_IdColumn IN
(
SELECT TableA_IdColumn FROM TableB WHERE TableA_IDColumn like '%%'
)
update to question:
You can't combine an IN statement with a like statement:
You'll have to do three different like statements to search on the various wildcards.
You could use a LIKE statement to obtain a list of IDs and then use that in the IN statement.
But you can't directly combine IN and LIKE.
Perhaps something like this?
SELECT DISTINCT
my_column
FROM
My_Table T
INNER JOIN My_List_Of_Value V ON
T.my_column LIKE '%' + V.search_value + '%'
In this example I've used a table with the values for simplicity, but you could easily change that to a subquery. If you have a large list (like tens of thousands) then performance might be rough.
select *
from parent
where exists( select *
from second
where office_code like trim( code_wildcard ) );
Trim code_wildcard just in case it has trailing blanks.
You could do the Like part in a subquery perhaps?
Select * From TableA Where X in (Select A from TableB where B Like '%123%')
tsql has the contains statement for a full-text-search enabled table.
CONTAINS(Description, '"sea*" OR "bread*"')
If I'm reading the question correctly, we want all Parent rows that have an Office_code that matches any Code_Wildcard in the "Second" table.
In Oracle, at least, this query achieves that:
SELECT *
FROM parent, second
WHERE office_code LIKE code_wildcard;
Am I missing something?