Not really sure how to explain this so I just start with the example.
Say I have a table like this which can include several rows:
id Type Text
1 Test Failure A=123 B=444 C=43343 Error=4 ErroDes=1
I also have a static Error and ErrorDes table which look like this
Id Code Description
1 1 Error1
2 4 Error4
How can I split up the information from the column into seperate fields and also join in the info from the subtables.
Expected result would be something like this:
Type Field1 FieldA FieldB FieldC Error ErrorDes
Test Failure 123 444 43343 Error4 Error1
I used the same table for joining in the example but this is 2 tables in the db.
So to help with this I have a split function in the database.
And if I first split the Text field on "space" and then on "=" I get everything I need (or atleast all the columns in seperate rows)
cross apply dbo.Split(a.Text, ' ') s
cross apply dbo.Split(s.Value, '=') s2
I get "TokenID" and "Value" field back from the split function.
The output from that looks like this:
TokenID Value TokenID Value
1 Failure 1 Failure
2 A=123 1 A
2 A=123 2 123
3 B=444 1 B
3 B=444 2 444
4 C=43343 1 C
4 C=43343 2 43343
5 Error=4 1 Error
5 Error=4 2 4
6 ErrorDes=1 1 ErrorDes
6 ErrorDes=1 2 1
I hope you understand what I ment and can help me how this can be solved.
you can use something like the folowing UDF function to cross apply
create function udf_ReturnTextSplit(#vText varchar(100))
returns #rt table (
Field1 varchar(100),
FieldA varchar(100),
FieldB varchar(100)
) as begin
declare #st varchar(100) = #vText + ' '
declare #sti varchar(100)
declare #stj varchar(100)
insert into #rt (Field1, FieldA, FieldB) values (null, null, null)
declare #i int = charindex(' ', #st)
while #i > 0 begin
set #sti = SUBSTRING(#st, 1, #i)
set #st = substring(#st, #i + 1, 100)
set #i = CHARINDEX('=', #sti)
if #i > 0 begin
set #stj = substring(#sti, #i + 1, 100)
set #sti = substring(#sti, 1, #i - 1)
if #sti = 'A' update #rt set FieldA = #stj
if #sti = 'B' update #rt set FieldB = #stj
end else begin
update #rt set Field1 = #sti
end
set #i = charindex(' ', #st)
end
return
end
go
select * from dbo.udf_ReturnTextSplit('Failure A=123 B=444 C=43343 Error=4 ErroDes=1')
Related
Sample table
Record Number | Filter | Filters_Applied
----------------------------------------------
1 | yes | red, blue
2 | yes | green
3 | no |
4 | yes | red, red, blue
Is it possible to query all records where there are duplicate string values? For example, how could I query to pull record 4 where the string "red" appeared twice? Except in the table that I am dealing with, there are far more string values that can populate in the "filters_applied" column.
CLARIFICATION I am working out of Periscope and pulling data using SQL.
I assume that you have to check that in the logical page.
You can query the table with like '%red%'.
select Filters_Applied from table where Filters_Applied like '%red%';
You will get the data which has red at least one. Then, doing some string analysis in logic page.
In php, You can use the substr_count function to determine the number of occurrences of the string.
//the loop to load db query
while(){
$number= substr_count("Filters_Applied",red);
if($number>1){
echo "this".$Filters_Applied.">1"
}
}
for SQL-SERVER or other versions which can run these functions
Apply this logic
declare #val varchar(100) = 'yellow,blue,white,green'
DECLARE #find varchar(100) = 'green'
select #val = replace(#val,' ','') -- remove spaces
select #val;
select (len(#val)-len(replace(#val,#find,'')))/len(#find) [recurrence]
Create this Function which will parse string into rows and write query as given below. This will works for SQL Server.
CREATE FUNCTION [dbo].[StrParse]
(#delimiter CHAR(1),
#csv NTEXT)
RETURNS #tbl TABLE(Keys NVARCHAR(255))
AS
BEGIN
DECLARE #len INT
SET #len = Datalength(#csv)
IF NOT #len > 0
RETURN
DECLARE #l INT
DECLARE #m INT
SET #l = 0
SET #m = 0
DECLARE #s VARCHAR(255)
DECLARE #slen INT
WHILE #l <= #len
BEGIN
SET #l = #m + 1--current position
SET #m = Charindex(#delimiter,Substring(#csv,#l + 1,255))--next delimiter or 0
IF #m <> 0
SET #m = #m + #l
--insert #tbl(keys) values(#m)
SELECT #slen = CASE
WHEN #m = 0 THEN 255 --returns the remainder of the string
ELSE #m - #l
END --returns number of characters up to next delimiter
IF #slen > 0
BEGIN
SET #s = Substring(#csv,#l,#slen)
INSERT INTO #tbl
(Keys)
SELECT #s
END
SELECT #l = CASE
WHEN #m = 0 THEN #len + 1 --breaks the loop
ELSE #m + 1
END --sets current position to 1 after next delimiter
END
RETURN
END
GO
CREATE TABLE Table1# (RecordNumber int, [Filter] varchar(5), Filters_Applied varchar(100))
GO
INSERT INTO Table1# VALUES
(1,'yes','red, blue')
,(2,'yes','green')
,(3,'no ','')
,(4,'yes','red, red, blue')
GO
--This query will return what you are expecting
SELECT t.RecordNumber,[Filter],Filters_Applied,ltrim(rtrim(keys)), count(*)NumberOfRows
FROM Table1# t
CROSS APPLY dbo.StrParse (',', t.Filters_Applied)
GROUP BY t.RecordNumber,[Filter],Filters_Applied,ltrim(rtrim(keys)) HAVING count(*) >1
You didn't state your DBMS, but in Postgres this isn't that complicated:
select st.*
from sample_table st
join lateral (
select count(*) <> count(distinct trim(item)) as has_duplicates
from unnest(string_to_array(filters_applied,',')) as t(item)
) x on true
where x.has_duplicates;
Online example: http://rextester.com/TJUGJ44586
With the exception of string_to_array() the above is actually standard SQL
I'm tryting to fill empty rows from my table . Here is the example from my table.
ID | Code |
1 NULL
2 NULL
3 NULL
what i want is
ID | Code |
1 KL0000001
2 KL0000002
3 KL0000003
I'm using sql server 2008 and here is my script so far :
declare #jml as int;
declare #no as int = 1;
declare #kode as varchar(50);
set #jml = (SELECT COUNT(IdArealeader) FROM arealeader);
set #kode = (select case
when right(max(KodeareaLeader),7) is null then 'KL0000001'
else ('KL' + RIGHT('0000000' + cast(right(max(KodeareaLeader),7) + 1 as nvarchar),7))
end KodeareaLeader from arealeader)
while #no < #jml begin
update arealeader set KodeareaLeader = #kode;
END
Try this simple method,
UPDATE T
SET T.Code = 'KL'+REPLICATE('0',7 - LEN(ID))+CAST(ID AS NVARCHAR(10))
FROM test_table T
Try to avoid loops, only use if it necessary.
Result
ID Code
1 KL0000001
2 KL0000002
3 KL0000003
....
10 KL0000010
I have 2 tables.
Table Heroes - 2 records
Name NVARCHAR(50)
PowerIds NVARCHAR(50)
Name PowerIds
'Hulk' '1,3'
'Reed Richards' '2'
Table Powers - 3 records
PowerId INT
PowerDescr NVARCHAR(50)
PowerId PowerDescr
1 'Strength'
2 'Intelligence'
3 'Durability'
What would be the smartest way to achieve this in a SELECT:
Name Powers
'Hulk' 'Strength, Durability'
'Reed Richards' 'Intelligence'
I cannot change the table structure, since this is a third party product.
The smartest way would be to normalize your table. Change the Heroes table to
Name PowerId
'Hulk' 1
'Hulk' 3
'Reed Richards' 2
or remove the power from the Heroes table and add another table that holds only the reference to a hero and the powers like this
HeroID PowerID
1 1
1 3
2 2
Never store multiple data in one column!
Try This:
SELECT Name,
STUFF(
(SELECT ',' + CAST(P.PowerDescr as VARCHAR(MAX))
FROM fn_ParseCsvString(H1.PowerIds, ',') H2
INNER JOIN Powers P ON P.PowerId = H2.ParsedString
FOR XML path('')),1,1,''
) AS Strength
FROM Heroes H1
Function:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION [dbo].[fn_ParseCsvString]
(
#csvString VARCHAR(MAX),
#delimiter VARCHAR(MAX)
)
RETURNS #parsedStringTable TABLE (ParsedString VARCHAR(MAX))
AS
BEGIN
DECLARE #startIndex INT, #targetedIndex INT
SELECT
#startIndex = 1
WHILE #startIndex <= LEN(#CSVString)
BEGIN
SELECT
#targetedIndex = charindex(#Delimiter, #CSVString, #startIndex)
IF #targetedIndex = 0
BEGIN
SELECT
#targetedIndex = len(#CSVString) + 1
END
INSERT #parsedStringTable
SELECT
SUBSTRING(#CSVString, #startIndex, #targetedIndex - #startIndex)
SELECT #startIndex = #targetedIndex + LEN(#Delimiter)
END
RETURN
END
GO
Here you can find a SQL Fiddle example.
I have been trying for a while now to return data from the database with the ID(int) values in the following order.
3, 6, 1, 9, 2, 5.
Is there anyway this can be done?
EDIT: Ok i made a bit of a stuff up in my post. the ID's above are just an example.
I am trying to do this dynamically, based around how many records from another table are linked to the record i want to pull out, e.g. i host 3 branches and each branch has a group of shops how would i determine which has the most?
I hope this helps.
Yes, something like this:
select ID from tablename
order by
CASE WHEN ID = 3 THEN 1
WHEN ID = 6 THEN 2
WHEN ID = 1 THEN 3
WHEN ID = 9 THEN 4
WHEN ID = 2 THEN 5
WHEN ID = 5 THEN 6
ELSE 7 END, ID ASC
This will put 3,6,1,9,2,5 and afterwords the other numbers in ascending order.
select cols from table where
order by
case ID when 3 then 0
when 6 then 1
when 1 then 2
when 9 then 3
...
end
You get the idea...
Create a table for the sorting.
CREATE TABLE SortPriority (
SourceID int NULL,
Priority int NULL)
Populate it with the ids and what order they should showup in. Join to the table. and use SortPriority.Priority in your sorting.
You can more easily change the sorting around this way. You would just need to modify the data. You can also later write scripts to populate the table to handle predictable needs in the changing of the sorting.
A split function like this one:
CREATE FUNCTION fnSplit(#str varchar(max), #dlm char(1))
RETURNS #result TABLE (id int, value varchar(50))
AS BEGIN
DECLARE
#id int, #value varchar(50),
#lastpos int, #pos int, #len int;
SET #id = 0;
SET #len = LEN(#str);
SET #lastpos = 1;
SET #pos = CHARINDEX(#dlm, #str + #dlm);
IF #pos <> 0
WHILE 1 = 1 BEGIN
SET #value = SUBSTRING(#str, #lastpos, #pos - #lastpos);
IF #value <> '' BEGIN
SET #id = #id + 1;
INSERT INTO #result VALUES (#id, #value);
END;
IF #pos > #len BREAK;
SET #lastpos = #pos + 1;
SET #pos = CHARINDEX(#dlm, #str + #dlm, #lastpos);
END;
RETURN;
END
would return a row set containing not only the values, but also their indexes within the list. You could then use the function in this way:
SELECT
…
FROM atable t
LEFT JOIN dbo.Split('3,6,1,9,2,5', ',') s ON t.Value = s.Value
ORDER BY
CASE WHEN s.id IS NULL THEN 2147483647 ELSE s.id END
I have a SQL table with column which contain string like 'type|type1|type2|type3|type4'.
I need to select the string, id. Split string and insert to another table. First item should be default and I need to get identity of it and insert to another table with the type value.
Please help me to create T-SQL query to accomplish desirable result.
Example
Step 1 To select Items from Table 1.
Step 2 Split to array
Step 3 Insert to Table 2 (first item will be default)
Step 4 Update Table 1 with default Type Value based on TypeID and Default True
Table 1
ID Items Default
--------------------------------------------------
1 type|type1|type2|type3|type4
2 type|type1|type2|type3|type4
Table 2
ID TypeID Type Default(bool)
--------------------------------------------------
1 1 type1 1
2 1 type2 0
Using the split function from Arnold Fribble's answer on this thread
Create FUNCTION dbo.Split (#sep char(1), #s varchar(512))
RETURNS table
AS
RETURN (
WITH Pieces(pn, start, stop) AS (
SELECT 1, 1, CHARINDEX(#sep, #s)
UNION ALL
SELECT pn + 1, stop + 1, CHARINDEX(#sep, #s, stop + 1)
FROM Pieces
WHERE stop > 0
)
SELECT pn,
SUBSTRING(#s, start, CASE WHEN stop > 0 THEN stop-start ELSE 512 END) AS s
FROM Pieces
)
GO
You can write the following (I made some guesses about the ID field in table2 and what the defaultTypeID should be in table1 but you should be able to adjust that)
CREATE TABLE #table1 (
id INT,
items VARCHAR(MAX),
defaulttypeid INT
)
CREATE TABLE #table2 (
id INT IDENTITY,
typeid INT,
TYPE VARCHAR(5),
isdefault BIT
)
INSERT INTO #table1
VALUES (1,
'type|type1|type2|type3|type4',
NULL),
(2,
'type|type1|type2|type3|type4',
NULL)
INSERT INTO #table2
(typeid,
TYPE,
isdefault)
SELECT id typeid,
Rtrim(split.s) AS item,
CASE
WHEN ( split.pn = 1 ) THEN 1
ELSE 0
END AS isdefault
FROM #table1
CROSS APPLY test.dbo.Split('|', items) AS split
UPDATE #table1
SET defaulttypeid = t2.ID
FROM #table1 t1
INNER JOIN #table2 t2
ON t1.id = t2.typeid
AND t2.isdefault = 1
DROP TABLE #table1
DROP TABLE #table2
This outputs
ID Items DefaultTypeID
----------- ------------------------------ -------------
1 type|type1|type2|type3|type4 1
2 type|type1|type2|type3|type4 6
ID TypeID Type IsDefault
----------- ----------- ----- ---------
1 1 type 1
2 1 type1 0
3 1 type2 0
4 1 type3 0
5 1 type4 0
6 2 type 1
7 2 type1 0
8 2 type2 0
9 2 type3 0
10 2 type4 0
Though I totally disagree with the use of cursors I can't think of another way. This solution isn't tested but It looks like it should be ok.
DECLARE #pos INT
DECLARE #id INT
DECLARE #string VARCHAR(MAX)
DECLARE #default INT
DECLARE #substring VARCHAR(MAX)
DECLARE tempCursor CURSOR FOR
SELECT id, string
FROM table_name
OPEN tempCursor;
FETCH NEXT FROM tempCursor
INTO #id, #string
WHILE ##FETCH_STATUS = 0
BEGIN
SET #default = 1
SET #pos = CHARINDEX('|', #string)
WHILE (#pos <> 0)
BEGIN
SET #substring = SUBSTRING(#string, 1, #pos - 1)
INSERT INTO table_name2(typeid, type, default) VALUES (#id, #substring, #default)
SET #string = substring(#string, #pos+1, LEN(#string))
SET #pos = charindex('|', #string)
SET #default = 0
END
FETCH NEXT FROM tempCursor
INTO #id, #string
END
CLOSE EWSCursor;
DEALLOCATE EWSCursor;
Hope this helps.