for example i have the following table (let's call it, comodity)
+-----------+
|name |
+-----------+
|kemasan |
|fe emas ex |
+-----------+
using the following query
SELECT * FROM comodity WHERE name ILIKE '%emas%'
give me two rows kemasan and fe emas ex, however I want to select only the second row fe emas ex. how to do that?
PS: it's also SHOULD NOT preceded/followed by any visible character.
Thanks in advance
SELECT *
FROM (VALUES
('blah emas blah'),
('vlademask'),
('emas1'),
('1emas'),
('emas'),
('1 emas'),
('emas 1')
) as commodity(word)
WHERE word ~* '\yemas\y'
Use a regular expression that matches words or start and stop markers.
Related
i have a column href which contiens a liste of links
href
100712107%23C3.3_.pdf
100712107~%23C3.2_C00.zip
100740104_C2.3.xls
testme_aze_--b00.xls
My ouput would be
href
name
rev
100712107%23C3.3_.pdf
100712107%23C3.3
100712107~%23C3.2_C00.zip
100712107~%23C3.2
C00
100740104_C2.3.xls
100740104
C2.3
testme_aze_--b00.xls
testme_aze
--b00
I have tried to use ** reverse(split_part(reverse(href),'.',1))**
You can use a regex together with substring() to extract the parts you want:
select href,
substring(href from '(.*)_') as name,
substring(href from '.*_(.*)\.') as rev
from the_table
returns:
href | name | rev
--------------------------+-------------------+------
100712107%23C3.3_.pdf | 100712107%23C3.3 |
100712107~%23C3.2_C00.zip | 100712107~%23C3.2 | C00
100740104_C2.3.xls | 100740104 | C2.3
testme_aze_--b00.xls | testme_aze | --b00
substring() will return the first group from the regex. The firs regex matches all characters until the last _.
The second expression matches everything after the last _ up until the last .
You want add a column to the table ?
ALTER TABLE TABLE_NAME ADD COLUMN HREF VARCHAR(255) NOT NULL;
How do I check in postgres that a varchar contains 'aaa' or 'bbb'?
I tried myVarchar IN ('aaa', 'bbb') but, obviously, it's true when myvarchar is exactly equal to 'aaa' or 'bbb'.
for multiple similarity check the best fit in terms of speed and laconic syntax would be
SIMILAR TO '%(aaa|bbb|ccc)%'
you can use ANY & LIKE operators together.
SELECT * FROM "myTable" WHERE "myColumn" LIKE ANY( ARRAY[ '%aaa%', '%bbb%' ] );
Assuming this is your table:
CREATE TABLE t
(
myVarchar varchar
) ;
INSERT INTO t (myVarchar)
VALUES
('something aaa else'),
('also some bbb'),
('maybe ccc') ;
-- (some random data, this query is PostgreSQL specific)
INSERT INTO t (myVarchar)
SELECT
random()::varchar
FROM
generate_series(1, 10000) ;
SQL Standard approach:
You can do (in all SQL standard databases):
SELECT
*
FROM
t
WHERE
myVarchar LIKE '%aaa%' or myVarchar LIKE '%bbb%' ;
and you'll get:
| myvarchar |
| :----------------- |
| something aaa else |
| also some bbb |
PostgreSQL specific approaches
Specifically for PostgreSQL, you can use a (single) regex with multiple values to look for:
SELECT
*
FROM
t
WHERE
myVarchar ~ 'aaa|bbb' ;
| myvarchar |
| :----------------- |
| something aaa else |
| also some bbb |
dbfiddle here
If you need quick finds, you can use trigram indexes, like this:
CREATE EXTENSION pg_trgm; -- Only needed if extension not already installed
CREATE INDEX myVarchar_like_idx
ON t
USING GIST (myVarchar gist_trgm_ops);
... the query using LIKE will be much faster.
I have a table EmployeeMoves:
| EmployeeID | CityIDs
+------------------------------
| 24 | 23,21,22
| 25 | 25,12,14
| 29 | 1,2,5
| 31 | 7
| 55 | 11,34
| 60 | 7,9,21,23,30
I'm trying to figure out how to expand the comma-delimited values from the EmployeeMoves.CityIDs column to populate an EmployeeCities table, which should look like this:
| EmployeeID | CityID
+------------------------------
| 24 | 23
| 24 | 21
| 24 | 22
| 25 | 25
| 25 | 12
| 25 | 14
| ... and so on
I already have a function called SplitADelimitedList that splits a comma-delimited list of integers into a rowset. It takes the delimited list as a parameter. The SQL below will give me a table with split values under the column Value:
select value from dbo.SplitADelimitedList ('23,21,1,4');
| Value
+-----------
| 23
| 21
| 1
| 4
The question is: How do I populate EmployeeCities from EmployeeMoves with a single (even if complex) SQL statement using the comma-delimited list of CityIDs from each row in the EmployeeMoves table, but without any cursors or looping in T-SQL? I could have 100 records in the EmployeeMoves table for 100 different employees.
This is how I tried to solve this problem. It seems to work and is very quick in performance.
INSERT INTO EmployeeCities
SELECT
em.EmployeeID,
c.Value
FROM EmployeeMoves em
CROSS APPLY dbo.SplitADelimitedList(em.CityIDs) c;
UPDATE 1:
This update provides the definition of the user-defined function dbo.SplitADelimitedList. This function is used in above query to split a comma-delimited list to table of integer values.
CREATE FUNCTION dbo.fn_SplitADelimitedList1
(
#String NVARCHAR(MAX)
)
RETURNS #SplittedValues TABLE(
Value INT
)
AS
BEGIN
DECLARE #SplitLength INT
DECLARE #Delimiter VARCHAR(10)
SET #Delimiter = ',' --set this to the delimiter you are using
WHILE len(#String) > 0
BEGIN
SELECT #SplitLength = (CASE charindex(#Delimiter, #String)
WHEN 0 THEN
datalength(#String) / 2
ELSE
charindex(#Delimiter, #String) - 1
END)
INSERT INTO #SplittedValues
SELECT cast(substring(#String, 1, #SplitLength) AS INTEGER)
WHERE
ltrim(rtrim(isnull(substring(#String, 1, #SplitLength), ''))) <> '';
SELECT #String = (CASE ((datalength(#String) / 2) - #SplitLength)
WHEN 0 THEN
''
ELSE
right(#String, (datalength(#String) / 2) - #SplitLength - 1)
END)
END
RETURN
END
Preface
This is not the right way to do it. You shouldn't create comma-delimited lists in SQL Server. This violates first normal form, which should sound like an unbelievably vile expletive to you.
It is trivial for a client-side application to select rows of employees and related cities and display this as a comma-separated list. It shouldn't be done in the database. Please do everything you can to avoid this kind of construction in the future. If at all possible, you should refactor your database.
The Right Answer
To get the list of cities, properly expanded, from a table containing lists of cities, you can do this:
INSERT dbo.EmployeeCities
SELECT
M.EmployeeID,
C.CityID
FROM
EmployeeMoves M
CROSS APPLY dbo.SplitADelimitedList(M.CityIDs) C
;
The Wrong Answer
I wrote this answer due to a misunderstanding of what you wanted: I thought you were trying to query against properly-stored data to produce a list of comma-separated CityIDs. But I realize now you wanted the reverse: to query the list of cities using existing comma-separated values already stored in a column.
WITH EmployeeData AS (
SELECT
M.EmployeeID,
M.CityID
FROM
dbo.SplitADelimitedList ('23,21,1,4') C
INNER JOIN dbo.EmployeeMoves M
ON Convert(int, C.Value) = M.CityID
)
SELECT
E.EmployeeID,
CityIDs = Substring((
SELECT ',' + Convert(varchar(max), CityID)
FROM EmployeeData C
WHERE E.EmployeeID = C.EmployeeID
FOR XML PATH (''), TYPE
).value('.[1]', 'varchar(max)'), 2, 2147483647)
FROM
(SELECT DISTINCT EmployeeID FROM EmployeeData) E
;
Part of my difficulty in understanding is that your question is a bit disorganized. Next time, please clearly label your example data and show what you have, and what you're trying to work toward. Since you put the data for EmployeeCities last, it looked like it was what you were trying to achieve. It's not a good use of people's time when questions are not laid out well.
Question about a query I'm trying to write in SQL Server Management Studio 2008. I am pulling 2 rows. The first row being the header information, the second row being the information for a certain Line Item. Keep in mind, the actual header information reads as "Column 0, 1, 2, 3, 4,.... etc."
The data looks something like this:
ROW 1: Model # | Item Description| XS | S | M | L | XL|
ROW 2: 3241 | Gray Sweatshirt| | 20 | 20 | 30 | |
Basically this shows that there are 20 smalls, 20 mediums, and 30 larges of this particular item. There are no XS's or XL's.
I want to create a subquery that puts this information in one row, but at the same time, disinclude the sizes with a blank quantity amount as shown under the XS and XL sizes.
I want it to look like this when all is said and done:
ROW 1: MODEL #| 3241 | ITEM DESCRIPTION | Gray Sweatshirt | S | 10 | M | 20 | L | 30 |
Notice there are no XS or XL's included. How do I do make it so those columns do not appear?
Since you are not posting your query, nor your table structure, I guess it is with columns Id, Description, Size. If so, you could do this and just replace with your table and column names:
DECLARE #columns varchar(8000)
SELECT #columns = COALESCE (#columns + ',[' + cast(Size as varchar) + ']', '[' + cast(Size as varchar) + ']' )
FROM YourTableName
WHERE COUNT(Size) > 0
DECLARE #query varchar(8000) = 'SELECT Id, Description, '
+ #columns +'
FROM
(SELECT Id, Description, Size
FROM YourTableName) AS Source
PIVOT
(
COUNT(Size)
FOR Size IN ('+ #columns +')
) AS Pvt'
EXEC(#query)
Anyhow, I also agree with #MichaelFredickson. I have implemented this pivot solution, yet it is absolutely better to let the presentation layer to take care of this after just pulling the raw data from SQL. If not, you would be processing the data twice, one on SQL to create the table and the other in the presentation when reading and displaying the values with your c#/vb/other code.
I've a problem with LIKE operator in PostgreSQL. It does not match patterns that contain the - character. I've tried to escape these characters using the ESCAPE option, but it still does not work.
Query:
select * from footable where trascrizione like '% [---]is Abraam %';
Sample data (contents of column trascrizione):
[---]is Abraam [e]t Ise[---] / ((crux quadrata))
How can I solve this problem?
That pattern would not match because there is no space before [---]is Ambraam. There is a space in your pattern, between the % and [ characters, and it's requiring that space to be in your data. Try LIKE '%[---]is Abraam %'.
Please show the code. I have no problem:
SELECT * FROM a WHERE a LIKE '%-' AND b LIKE '%-%' AND c LIKE '-%';
a | b | c | d | e
------+---+------+---+---
foo- | - | -bar | |
(1 Zeile)