sql,tsql,recursion,order,hierarchy , T-SQL Ordering a Recursive Query - Parent/Child Structure
T-SQL Ordering a Recursive Query - Parent/Child Structure
I am trying (and failing) to correctly order my recursive CTE. My table consists of a parent-child structure where one task can relate to another on a variety of different levels.
For example I could create a task (this is the parent), then create a sub-task from this and then a sub-task from that sub-task and so forth..
Below is some test data that I have included. Currently it's ordered by
Path which orders it alphabetically.
So if I were to create a task. It would give me a TaskID for that task (Say 50) - I could then create 5 subtasks for that main task (51,52,53,54,55). I could then add sub-tasks to the 5 subtasks (51->56) (53->57) but when I want the order I would need it returning
So the order I would require it
Proper order of the test data
Here is the code that I have been using
DECLARE @TaskID NUMERIC(10,0)
SET @TaskID = 38
;WITH cte AS
,CONVERT(VARCHAR(MAX),'') AS [Nest]
,CONVERT(VARCHAR(MAX),'') AS [Path]
t.ParentID IS NULL
AND t.TaskID = @TaskID
,cte.[Nest] + CONVERT(VARCHAR(MAX),sub.TaskID) AS [Nest]
,cte.[Path] + ',' + CONVERT(VARCHAR(MAX),sub.TaskID) AS [Path]
INNER JOIN cte ON cte.TaskID = sub.ParentID
,NULLIF(LEN(cte.[Path]) - LEN(REPLACE(cte.[Path], ',', '')),0) Nest
,CONVERT(VARCHAR(25),@TaskID) + cte.[Path] AS [Path]
I have a feeling it will be blindingly obvious but I'm really not sure how to proceed. I thought about more recursion, functions, splitting the string with no success.
Apologies if I'm not being clear
The easiest way would be to pad the keys to a fixed length. e.g.
038,007 will be ordered before
038,012 But the padding length would have to be safe for the largest taskid. Although you could keep your
path trimmed for readability and create an extra padded field for sorting.
A somewhat safer version would be to do the same, but create a padded path from row_numbers. Where the padding size would have to be big enough to support the maximum number of sub items.
DECLARE @TaskID NUMERIC(10,0)
SET @TaskID = 38
declare @maxsubchars int = 3 --not more than 999 sub items
;with cte as
,0 AS [Nest]
,CONVERT(VARCHAR(MAX),t.taskid) AS [Path]
t.ParentID IS NULL
AND t.TaskID = @TaskID
,cte.Nest + 1
,cte.[Path] + ',' + CONVERT(VARCHAR(MAX),sub.TaskID)
,cte.OrderPath + ',' + right(REPLICATE('0', @maxsubchars) + CONVERT(VARCHAR,ROW_NUMBER() over (order by sub.TaskID)), @maxsubchars)
INNER JOIN cte ON cte.TaskID = sub.ParentID
select taskid, parentid, title,nullif(nest,0) Nest,Path, createddate from cte order by OrderPath
You could probably go more fancy than a fixed subitem length, determining the amount of subitems and basing the padding on said length. Or using numbered rows based on the amount of siblings and traverse in reverse direction and maybe (just spouting some untested thoughts), but using a simple ordered path is likely enough.
So I am working with a database where I will be purging various tables that contain rows that are older than 30days. I have fairly limited knowledge of SQL and wanted to know if there was a certain way to select the row that will be purged and the rows...
I have a query to display the year value from a table and default the current year. select distinct year(startdate) as syear, year(startdate) as eyear, 1 as sOrder from [TTS].[dbo].[Class] where year(startdate) <> year(getdate()) union all select year(getdate()) as syear, year(getdate()) as eyear, 0 as sOrder order by sOrder asc,...
I have two tables, A and B, in a dataset in SQL Server; I have created a connection to the dataset in a c# project in visual studio. How can I create a foreign key ( A is the parent) between my two tables ? I want to create the...
I am looking for a "better" way to perform a query in which I want to show a single player who he has played previously and the associated win-loss record for each such opponent. Here are the tables involved stripped down to essentials: create table player (player_id int, username text);...
I have Two tables first us IMG_detail S.NO Title 1 women holding stack of gifts 2 Rear view of a man playing golf 3 Women holding gifts 4 Close-up of a golf ball on a tee 5 Businessman reading a newspaper and smiling and Second is tbl_NoiceWords SN Key 1...
Here is my SQL query which returns number of days by subtracting current date from specified date and returns exact as i need, but in addition i want to add 1 to result if current time passes 14:30 or 2:30. My query SELECT reservations.customerid, DateDiff("d",reservations.checkin_date,Now()) AS Due_nights FROM reservations Am...
If i have a resultset like this for example (just a list of numbers) : 1,2,3,4,5,6,7,8,9,10,11 and I would like to add a grouping column so i can group them per 4 like this : 1,1,1,1,2,2,2,2,3,3,3 (The last one in this examle does not have a forth element, so that...
I have values like below I need to take only the thousand value in sql. 38,635.123 90,232.89 123,456.47888 I need to take result as below. 635 232 456...
I have this issue, I need your help: EmpNo Shift_Date Shift1 shift2 stamp_Date stamp_Time stamp_Type 426 2015-04-12 A 2015-04-12 10:09:00.000 I 426 2015-04-15 B C 2015-04-15 23:46:00.000 I 426 2015-04-15 B C 2015-04-15 23:45:00.000 O 426 2015-04-16 OF 2015-04-16 07:02:00.000 O 426 2015-04-17 A 2015-04-17 07:34:00.000 I 426 2015-04-18 A...
I am trying to write a procedure that inserts calculated table data into another table. The problem I have is that I need each row's calculated column to be influenced by the result of the previous row's calculated column. I tried to lag the calculation itself but this does not...
I have to parse very big (abt 40Gb) text files(logs) very often. Usually AWK/grep is enough for my needs, but logs are growing and now I'm curious whether sqlite3 will allow me to do the same things more efficiently. I chosen sqlite for my tests as it installed out-of-the-box (SQLite...
When I use mysql_real_escape_string in my localhost and I output the result of html in a table I have no problem. But when I use it on my server it outputs even the \ This is how I use it: $_GETVARS['txtEmpNum'] = mysql_real_escape_string($_GETVARS['txtEmpNum']); $_GETVARS['txtLName'] = mysql_real_escape_string($_GETVARS['txtLName']); $_GETVARS['txtFName'] = mysql_real_escape_string($_GETVARS['txtFName']); $varSQL...
I have two 2 table t1(years int, numOfppl int), t2(years int, numOfppl int). t1 contains years between 2001 and 2010 , t2 contains years between 2003-2005 and 2007-2010 I want to query a result like that t1.years t1.numOfppl t2.yeras t2.numOfppl 2001 7 null null 2002 6 null null 2003 4...
I am having an issue going through column by column and getting a count of all the non-null values in each column. I think issue is how I am getting the column names. In the last select statement where I am trying to select all of the values in each...
[Aim] We would like to find out how often an event "A" ocurred before time "X". More concretely, given the dataset below we want to find out the count of the prior purchases. [Context] DMBS: MySQL 5.6 We have following dataset: user | date 1 | 2015-06-01 17:00:00 2 |...
I have two tables, one an abbreviated calendar: create table dbo.calendar ( [date] datetime ) insert into dbo.calendar values ('20150101 00:00:00 AM') -- 1/1/15 insert into dbo.calendar values ('20150102 00:00:00 AM') -- 1/2/15 insert into dbo.calendar values ('20150103 00:00:00 AM') -- 1/3/15 insert into dbo.calendar values ('20150104 00:00:00 AM') --...
I want to select the sum of values of my_field. The unit of my_field is in seconds. I don't want to exceed 24 hours, so when it exceeds 24 hours, I want it to select 24*60*60 = 86400. SELECT IF(SUM(my_field) > 86400, 86400, SUM(my_field)) ... This solution doesn't seem to...
I've a database value that when inserted into a SQL variable, shows with question mark at the end !! can't find a reason?! declare @A varchar(50) = 'R2300529' select @A Results: R2300529? any explanation? i'm using SQL server 2012....
SELECT * FROM FirstTable WHERE RowProcessed = 'N' AND ( CASE WHEN EXISTS(SELECT top 1 FROM SecondTable) THEN 1 ELSE EXISTS( SELECT SecondTable.RowProcessed FROM SecondTable WHERE FirstTable.Key = SecondTable.Key AND SecondTable.RowProcessed = 'Y' ) END ) AND OtherConditions Case When then else in where clause. Not sure about the syntax....
Emp_No Emp_Shift Emp_Date 500 AL 1/5/2015 600 S 2/5/2015 600 H 3/5/2015 500 S 4/5/2015 500 AL 5/5/2015 600 AL 6/5/2015 I need help on this issue , HOW TO RETURN count in 3 Columns >> EX: Emp_No Count Al Count S Count H 500 2 1 0 600 1...
I have the following DB table called messages with columns: thread_id, sender_id, receiver_id, date Example: +-----------+------------+-------------+-------------+ | thread_id | sender_id | receiver_id | date | +----------------------+-----------+-----------------+ | 1 | 1 | 2 | 11/06/2015 | | 1 | 2 | 1 | 14/06/2015 | | 1 | 1 | 2...
I am getting the following error message when I am trying to do replace null to zero. The column name "jan" specified in the PIVOT operator conflicts with the existing column name in the PIVOT argument. Query below: select * from(select isnull(jan,0),isnull(feb,0),sum(data) as amount )as p pivot( sum(amount) for month...
from sqlalchemy import create_engine import _mssql from matplotlib import pyplot as plt engine = create_engine('mssql+pymssql://**:****@127.0.0.1:1433/AffectV_Test') connection = engine.connect() result = connection.execute('SELECT Campaign_id, SUM(Count) AS Total_Count FROM Impressions GROUP BY Campaign_id') for row in result: print row connection.close() The above code generates an array: (54ca686d0189607081dbda85', 4174469) (551c21150189601fb08b6b64', 182) (552391ee0189601fb08b6b73', 237304) (5469f3ec0189606b1b25bcc0',...
This is the query I'm using to count how many events are booked for each category of bookings. SELECT Categories.name, count(case when locations.name ='loc 1' then 1 end) as Location1, count(case when locations.name ='loc 2' then 1 end) as Location2, count(case when locations.name ='loc 3' then 1 end) as Location3,...
I have this mysql table structure: ------------------------------------ | item_id | meta_key | meta_value | ------------------------------------ 159 category Bungalow 159 location Lagos 159 price 45000 160 category Bungalow 160 location Abuja 160 price 53500 ... 350 category Bungalow 350 location Lagos 350 price 32000 What I'd like to do is select...
Basically i want to inner join 3 tables and the case is understood by the query itself as follows. Tables: A has 2 columns column 1 and column 2 B has 2 columns column 3 and column 4 C has 3 columns column 5,column 6 and column 7 Query: select...
I am trying to add n columns to a table, like in this example of code where n = 10: Sub toto() Dim db As Database, i As Integer Set db = CurrentDb() For i = 1 To i = 10 db.Execute " ALTER TABLE time_series " _ & "ADD...
I want to find all the dealers who haven't had an order in 2015 yet. I know this query doesn't work but I thought it might be helpful to understand what I want to do. In this example I want to get just "Bob" as a result. He is the...
I have this situation in a stored Procedure: SET @DATE_RELEASE_START = '2015-01-01'; SET @DATE_RELEASE_END = '2015-05-31' SELECT @statement = ' SELECT * FROM (SELECT AFCDENTE, M.ID_MODIFICATION_CODE, COUNT(*) AS Conteggio--, CAST((COUNT(*) * 100/ 15032) AS decimal(10,7)) AS Percentage FROM CIC_LOG_MODIFICHE AS L INNER JOIN ADM_MODIFICATION_CODE AS M ON L.CD_MODIFICATION_CODE = M.CD_MODIFICATION_CODE...
Is there a way to ensure, when you design a table - SQL, MySQL -, that only one cell from column X is true, the rest being automatically false? When you change the value of a different cell to true, all other cells should automatically become false. A radio button...
If this is a duplicate, please let me know, I haven't found anything. I have written a php file that can read content from a database table and write it into a excel .xls file. Everything works fine except by that timestamps. In my generated .xls file every timestamp is...
Can someone tell me how this is an exclude? Assuming that tableID is auto generated and in columnY there can be value of 0 or 1. This statement should exclude everything were columnY has a value of 1. SELECT * FROM [table].[dbo].[one] AS t1 LEFT JOIN [table].[dbo].[one] AS t2 ON...
I am creating a very small, simple CRM for a company, they require the function to be able to view the last 25 orders via the dashboard. The orders are added via a Order-add form within the CRM. When adding the following code to the CRM I get an error:...
I'm currently working on a report that shows me all post codes covered by our sales team. Each team covers over 100 post codes. What i would like to do is create a report that brings back the clients within the post code. Currently my code looks like this. SELECT...
I have a table t as follows: CREATE TABLE t( id INTEGER PRIMARY KEY AUTOINCREMENT, date TEXT, a TEXT, b TEXT ); Sample Data 1|2015-06-15|a1 15|b1 15 2|2015-06-15|a2 15|b2 15 3|2015-06-16|a1 16|b1 16 4|2015-06-16|a2 16|b2 16 5|2015-06-17|a1 17|b1 17 6|2015-06-17|a2 17|b2 17 I want to select all values of a...
I've the following table in my PHPMYADMIN The desired output is headline impressions clicks Buy A new Iphone ...
I am a beginner to SQL, and I am having trouble getting rid of repeated code. I have a condition "AccountId=20" that I use twice in a SQL query. The SQL looks something like: DELETE FROM Table_A WHERE FunctionId IN (Select FunctionId FROM Table_B WHERE AccountId=20); DELETE FROM Table_B WHERE...
I am creating a key-wording module where I want to search data using the comma separated words.And the search is categorized into comma , and minus -. I know a relational database engine is designed from the principle that a cell holds a single value and obeying to this rule...
I know looping is not ideal in SQL, but I couldn't think of another way of doing this. I want each distinct row from this Table 1 to have each distinct date and hour produced on Table 2. In other words, Table 2 has the dates between 05/01/2014 through 04/30/2015,...
I couldn't find the answer to my specific question anywhere. Is it possible to select from two different views? For example my code looks something like this right. select view1.col1, view1.col2, view1.col3 from dbo.view1 inner join ~~~~~ inner join ~~~~~ but I want to include a column from a different...
I have the following Group By SQL: SELECT s.Login_Name, COUNT(s.s1CIDNumber) FROM [dbSuppHousing].[dbo].[tblSurvey] s group by s.Login_Name I want to know how I can join this result set to another table(tblUsers) to add user_id to the result set (tblSurvey and tblUsers have 1-1 relationship on Login_Name) I tried the following: Select...
My table looks like this: CREATE TABLE MyTable ( TableID INT IDENTITY NOT NULL, ForeignID INT NOT NULL, Value sql_variant NOT NULL, CodeOne VARCHAR(4) NOT NULL, CodeTwo VARCHAR(4) NOT NULL ) I'm trying to do a insert with the following code: INSERT INTO MyTable(ForeignID, Value, CodeOne, CodeTwo) VALUES ( 1,...
I am trying (and failing) to correctly order my recursive CTE. My table consists of a parent-child structure where one task can relate to another on a variety of different levels. For example I could create a task (this is the parent), then create a sub-task from this and then...