Related
could someone please help? My starting table looks like this with 2 fields:
Name Counter
dave 2
Joe 3
I want my result to look like this:
Name Counter
dave 1
dave 2
joe 1
joe 2
joe 3
Essentially creating n number of records base on the counter and starts at 1. I tried to do a loop using counter as a variable, but the code just runs nonstop.. could someone help?
A procedural SQL Server solution:
declare #input table
(
name nvarchar(100)
,wantedrows int
,processed bit
,id uniqueidentifier
);
declare #output table
(
name nvarchar(100)
,rownum int
);
insert into #input
select 'Dave',3,0,newid()
union
select 'Joe',2,0,newid();
while exists(select * from #input where processed = 0)
begin
declare #currentid uniqueidentifier = (select top 1 id from #input where processed = 0);
declare #currentwantedrows int = (select wantedrows from #input where id = #currentid);
declare #i int = 0;
while #i < #currentwantedrows
begin
insert into #output
select name,#i+1
from #input
where id = #currentid;
set #i = #i + 1;
end;
update #input set processed = 1 where id = #currentid;
end
select name,wantedrows from #input;
select * from #output;
You can use a number-table or following trick using a system view to build a sequence:
WITH Nums AS
(
SELECT n = ROW_NUMBER() OVER (ORDER BY [object_id])
FROM sys.all_objects
)
SELECT Name, Counter = n
FROM Nums n CROSS JOIN Table1 t1
WHERE n BETWEEN 1 AND Counter
ORDER BY Name, Counter;
Demo
This view has only about 2000 rows, so if you need more you could use a number-table.
http://sqlperformance.com/2013/01/t-sql-queries/generate-a-set-1
( presuming SQL-Server )
Is a hundred copies enough?
create table #c (num)
insert into #c (num)
select 0 union
select 1 union
select 2 union
select 3 union
select 4 union
select 5 union
select 6 union
select 7 union
select 8 union
select 9
select T.Name, c1.num * 10 + c0.num + 1
from T, #c c1, #c c0
where c1.num * 10 + c0.num < T.Counter
drop table #c
You didn't say which version of Sybase. The old ones I've worked on didn't allow derived tables so I had to throw the values into a temp table. But you can see how to extend the idea. This may not be the best approach if this is something you need to do more than once though.
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 a varchar string of delimited numbers separated by commas that I want to use in my SQL script but I need to compare with a bigint field in the database. Need to know to convert it:
DECLARE #RegionID varchar(200) = null
SET #RegionID = '853,834,16,467,841,460,495,44,859,457,437,836,864,434,86,838,458,472,832,433,142,154,159,839,831,469,442,275,840,299,446,220,300,225,227,447,301,450,230,837,441,835,302,477,855,411,395,279,303'
SELECT a.ClassAdID, -- 1
a.AdURL, -- 2
a.AdTitle, -- 3
a.ClassAdCatID, -- 4
b.ClassAdCat, -- 5
a.Img1, -- 6
a.AdText, -- 7
a.MemberID, -- 9
a.Viewed, -- 10
c.Domain, -- 11
a.CreateDate -- 12
FROM ClassAd a
INNER JOIN ClassAdCat b ON b.ClassAdCAtID = a.ClassAdCAtID
INNER JOIN Region c ON c.RegionID = a.RegionID
AND a.PostType = 'CPN'
AND DATEDIFF(d, GETDATE(), ExpirationDate) >= 0
AND a.RegionID IN (#RegionID)
AND Viewable = 'Y'
This fails with the following error:
Error converting data type varchar to bigint.
RegionID In the database is a bigint field.. need to convert the varchar to bigint.. any ideas..?
Many thanks in advance,
neojakey
create this function:
CREATE function [dbo].[f_split]
(
#param nvarchar(max),
#delimiter char(1)
)
returns #t table (val nvarchar(max), seq int)
as
begin
set #param += #delimiter
;with a as
(
select cast(1 as bigint) f, charindex(#delimiter, #param) t, 1 seq
union all
select t + 1, charindex(#delimiter, #param, t + 1), seq + 1
from a
where charindex(#delimiter, #param, t + 1) > 0
)
insert #t
select substring(#param, f, t - f), seq from a
option (maxrecursion 0)
return
end
change this part:
AND a.RegionID IN (select val from dbo.f_split(#regionID, ','))
Change this for better overall performance:
AND DATEDIFF(d, 0, GETDATE()) <= ExpirationDate
Your query does not know that those are separate values, you can use dynamic sql for this:
DECLARE #RegionID varchar(200) = null
SET #RegionID = '853,834,16,467,841,460,495,44,859,457,437,836,864,434,86,838,458,472,832,433,142,154,159,839,831,469,442,275,840,299,446,220,300,225,227,447,301,450,230,837,441,835,302,477,855,411,395,279,303'
declare #sql nvarchar(Max)
set #sql = 'SELECT a.ClassAdID, -- 1
a.AdURL, -- 2
a.AdTitle, -- 3
a.ClassAdCatID, -- 4
b.ClassAdCat, -- 5
a.Img1, -- 6
a.AdText, -- 7
a.MemberID, -- 9
a.Viewed, -- 10
c.Domain, -- 11
a.CreateDate -- 12
FROM ClassAd a
INNER JOIN ClassAdCat b ON b.ClassAdCAtID = a.ClassAdCAtID
INNER JOIN Region c ON c.RegionID = a.RegionID
AND a.PostType = ''CPN''
AND DATEDIFF(d, GETDATE(), ExpirationDate) >= 0
AND a.RegionID IN ('+#RegionID+')
AND Viewable = ''Y'''
exec sp_executesql #sql
I use this apporach sometimes and find it very good.
It transfors your comma-separated string into an AUX table (called #ARRAY) and then query the main table based on the AUX table:
declare #RegionID varchar(50)
SET #RegionID = '853,834,16,467,841,460,495,44,859,457,437,836,864,434,86,838,458,472,832,433,142,154,159,839,831,469,442,275,840,299,446,220,300,225,227,447,301,450,230,837,441,835,302,477,855,411,395,279,303'
declare #S varchar(20)
if LEN(#RegionID) > 0 SET #RegionID = #RegionID + ','
CREATE TABLE #ARRAY(region_ID VARCHAR(20))
WHILE LEN(#RegionID) > 0 BEGIN
SELECT #S = LTRIM(SUBSTRING(#RegionID, 1, CHARINDEX(',', #RegionID) - 1))
INSERT INTO #ARRAY (region_ID) VALUES (#S)
SELECT #RegionID = SUBSTRING(#RegionID, CHARINDEX(',', #RegionID) + 1, LEN(#RegionID))
END
select * from your_table
where regionID IN (select region_ID from #ARRAY)
It avoids you from ahving to concatenate the query string and then use EXEC to execute it, which I dont think it is a very good approach.
if you need to run the code twice you will need to drop the temp table
I think the answer should be kept simple.
Try using CHARINDEX like this:
DECLARE #RegionID VARCHAR(200) = NULL
SET #RegionID =
'853,834,16,467,841,460,495,44,859,457,437,836,864,434,86,838,458,472,832,433,142,154,159,839,831,469,442,275,840,299,446,220,300,225,227,447,301,450,230,837,441,835,302,477,855,411,395,279,303'
SELECT 1
WHERE Charindex('834', #RegionID) > 0
SELECT 1
WHERE Charindex('999', #RegionID) > 0
When CHARINDEX finds the value in the large string variable, it will return it's position, otherwise it return 0.
Use this as a search tool.
The easiest way to change this query is to replace the IN function with a string function. Here is what I consider the safest approach using LIKE (which is portable among databases):
AND ','+#RegionID+',' like '%,'+cast(a.RegionID as varchar(255))+',%'
Or CHARINDEX:
AND charindex(','+cast(a.RegionID as varchar(255))+',', ','+#RegionID+',') > 0
However, if you are explicitly putting the list in your code, why not use a temporary table?
declare #RegionIds table (RegionId int);
insert into #RegionIds
select 853 union all
select 834 union all
. . .
select 303
Then you can use the table in the IN clause:
AND a.RegionId in (select RegionId from #RegionIds)
or in a JOIN clause.
I like Diego's answer some, but I think my modification is a little better because you are declaring a table variable and not creating an actual table. I know the "in" statement can be a little slow, so I did an inner join since I needed some info from the Company table anyway.
declare #companyIdList varchar(1000)
set #companyIdList = '1,2,3'
if LEN(#companyIdList) > 0 SET #companyIdList = #companyIdList + ','
declare #CompanyIds TABLE (CompanyId bigint)
declare #S varchar(20)
WHILE LEN(#companyIdList) > 0 BEGIN
SELECT #S = LTRIM(SUBSTRING(#companyIdList, 1, CHARINDEX(',', #companyIdList) - 1))
INSERT INTO #CompanyIds (CompanyId) VALUES (#S)
SELECT #companyIdList = SUBSTRING(#companyIdList, CHARINDEX(',', #companyIdList) + 1, LEN(#companyIdList))
END
select d.Id, d.Name, c.Id, c.Name
from [Division] d
inner join [Company] c on d.CompanyId = c.Id
inner join #CompanyIds cids on c.Id = cids.CompanyId
In my table, I have a varchar column whereby multi-values are stored. An example of my table:
RecNum | Title | Category
-----------------------------------------
wja-2012-000001 | abcdef | 4,6
wja-2012-000002 | qwerty | 1,3,7
wja-2012-000003 | asdffg |
wja-2012-000004 | zxcvbb | 2,7
wja-2012-000005 | ploiuh | 3,4,12
The values in the Category column points to another table.
How can I return the relevant rows if I want to retrieve the rows with value 1,3,5,6,8 in the Category column?
When I tried using IN, I get the 'Conversion failed when converting the varchar value '1,3,5,6,8' to data type int' error.
Breaking the Categories out into a separate table would be a better design if that's a change you can make... otherwise, you could create a function to split the values into a table of integers like this:
CREATE FUNCTION dbo.Split(#String varchar(8000), #Delimiter char(1))
returns #temptable TABLE (id int)
as
begin
declare #idx int
declare #slice varchar(8000)
select #idx = 1
if len(#String)<1 or #String is null return
while #idx!= 0
begin
set #idx = charindex(#Delimiter,#String)
if #idx!=0
set #slice = left(#String,#idx - 1)
else
set #slice = #String
if(len(#slice)>0)
insert into #temptable(id) values(convert(int, #slice))
set #String = right(#String,len(#String) - #idx)
if len(#String) = 0 break
end
return
end
Then call it from your query:
SELECT ...
FROM ...
WHERE #SomeID IN (SELECT id FROM dbo.Split(Category, ','))
Or if you're looking to provide a list of categories as an input parameter (such as '1,3,5,6,8'), and return all records in your table that contain at least one of these values, you could use a query like this:
SELECT ...
FROM ...
WHERE
EXISTS (
select 1
from dbo.Split(Category, ',') s1
join dbo.Split(#SearchValues, ',') s2 ON s1.id = s2.id
)
you can do like this
declare #var varchar(30); set #var='2,3';
exec('select * from category where Category_Id in ('+#var+')')
Try this solution:
CREATE TABLE test4(RecNum varchar(20),Title varchar(10),Category varchar(15))
INSERT INTO test4
VALUES('wja-2012-000001','abcdef','4,6'),
('wja-2012-000002','qwerty','1,3,7'),
('wja-2012-000003','asdffg',null),
('wja-2012-000004','zxcvbb','2,7'),
('wja-2012-000005','ploiuh','3,4,12')
select * from test4
Declare #str varchar(25) = '1,3,5,6,8'
;WITH CTE as (select RecNum,Title,Category from test4)
,CTE1 as (
select RecNum,Title,RIGHT(#str,LEN(#str)-CHARINDEX(',',#str,1)) as rem from CTE where category like '%'+LEFT(#str,1)+'%'
union all
select c.RecNum,c.Title,RIGHT(c1.rem,LEN(c1.rem)-CHARINDEX(',',c1.rem,1)) as rem from CTE1 c1 inner join CTE c
on c.category like '%'+LEFT(c1.rem,1)+'%' and CHARINDEX(',',c1.rem,1)>0
)
select RecNum,Title from CTE1
As mentioned by others, your table design violates basic database design principles and if there is no way around it, you could normalize the table with little code (example below) and then join away with the other table. Here you go:
Data:
CREATE TABLE data(RecNum varchar(20),Title varchar(10),Category varchar(15))
INSERT INTO data
VALUES('wja-2012-000001','abcdef','4,6'),
('wja-2012-000002','qwerty','1,3,7'),
('wja-2012-000003','asdffg',null),
('wja-2012-000004','zxcvbb','2,7'),
('wja-2012-000005','ploiuh','3,4,12')
This function takes a comma separated string and returns a table:
CREATE FUNCTION listToTable (#list nvarchar(MAX))
RETURNS #tbl TABLE (number int NOT NULL) AS
BEGIN
DECLARE #pos int,
#nextpos int,
#valuelen int
SELECT #pos = 0, #nextpos = 1
WHILE #nextpos > 0
BEGIN
SELECT #nextpos = charindex(',', #list, #pos + 1)
SELECT #valuelen = CASE WHEN #nextpos > 0
THEN #nextpos
ELSE len(#list) + 1
END - #pos - 1
INSERT #tbl (number)
VALUES (convert(int, substring(#list, #pos + 1, #valuelen)))
SELECT #pos = #nextpos
END
RETURN
END
Then, you can do something like this to "normalize" the table:
SELECT *
FROM data m
CROSS APPLY listToTable(m.Category) AS t
where Category is not null
And then use the result of the above query to join with the "other" table. For example (i did not test this query):
select * from otherTable a
join listToTable('1,3,5,6,8') b
on a.Category = b.number
join(
SELECT *
FROM data m
CROSS APPLY listToTable(m.Category) AS t
where Category is not null
) c
on a.category = c.number
I have a column named sequence. The data in this column looks like 1, 2, 3, 4, 5, 7, 9, 10, 15.
I need to find the missing sequence numbers from the table. What SQL query will find the missing sequence numbers from my table? I am expecting results like
Missing numbers
---------------
6
8
11
12
13
14
I am using only one table. I tried the query below, but am not getting the results I want.
select de.sequence + 1 as sequence from dataentry as de
left outer join dataentry as de1 on de.sequence + 1 = de1.sequence
where de1.sequence is null order by sequence asc;
How about something like:
select (select isnull(max(val)+1,1) from mydata where val < md.val) as [from],
md.val - 1 as [to]
from mydata md
where md.val != 1 and not exists (
select 1 from mydata md2 where md2.val = md.val - 1)
giving summarised results:
from to
----------- -----------
6 6
8 8
11 14
I know this is a very old post but I wanted to add this solution that I found HERE so that I can find it easier:
WITH Missing (missnum, maxid)
AS
(
SELECT 1 AS missnum, (select max(id) from #TT)
UNION ALL
SELECT missnum + 1, maxid FROM Missing
WHERE missnum < maxid
)
SELECT missnum
FROM Missing
LEFT OUTER JOIN #TT tt on tt.id = Missing.missnum
WHERE tt.id is NULL
OPTION (MAXRECURSION 0);
Try with this:
declare #min int
declare #max int
select #min = min(seq_field), #max = max(seq_field) from [Table]
create table #tmp (Field_No int)
while #min <= #max
begin
if not exists (select * from [Table] where seq_field = #min)
insert into #tmp (Field_No) values (#min)
set #min = #min + 1
end
select * from #tmp
drop table #tmp
The best solutions are those that use a temporary table with the sequence. Assuming you build such a table, LEFT JOIN with NULL check should do the job:
SELECT #sequence.value
FROM #sequence
LEFT JOIN MyTable ON #sequence.value = MyTable.value
WHERE MyTable.value IS NULL
But if you have to repeat this operation often (and more then for 1 sequence in the database), I would create a "static-data" table and have a script to populate it to the MAX(value) of all the tables you need.
SELECT CASE WHEN MAX(column_name) = COUNT(*)
THEN CAST(NULL AS INTEGER)
-- THEN MAX(column_name) + 1 as other option
WHEN MIN(column_name) > 1
THEN 1
WHEN MAX(column_name) <> COUNT(*)
THEN (SELECT MIN(column_name)+1
FROM table_name
WHERE (column_name+ 1)
NOT IN (SELECT column_name FROM table_name))
ELSE NULL END
FROM table_name;
Here is a script to create a stored procedure that returns missing sequential numbers for a given date range.
CREATE PROCEDURE dbo.ddc_RolledBackOrders
-- Add the parameters for the stored procedure here
#StartDate DATETIME ,
#EndDate DATETIME
AS
BEGIN
SET NOCOUNT ON;
DECLARE #Min BIGINT
DECLARE #Max BIGINT
DECLARE #i BIGINT
IF OBJECT_ID('tempdb..#TempTable') IS NOT NULL
BEGIN
DROP TABLE #TempTable
END
CREATE TABLE #TempTable
(
TempOrderNumber BIGINT
)
SELECT #Min = ( SELECT MIN(ordernumber)
FROM dbo.Orders WITH ( NOLOCK )
WHERE OrderDate BETWEEN #StartDate AND #EndDate)
SELECT #Max = ( SELECT MAX(ordernumber)
FROM dbo.Orders WITH ( NOLOCK )
WHERE OrderDate BETWEEN #StartDate AND #EndDate)
SELECT #i = #Min
WHILE #i <= #Max
BEGIN
INSERT INTO #TempTable
SELECT #i
SELECT #i = #i + 1
END
SELECT TempOrderNumber
FROM #TempTable
LEFT JOIN dbo.orders o WITH ( NOLOCK ) ON tempordernumber = o.OrderNumber
WHERE o.OrderNumber IS NULL
END
GO
Aren't all given solutions way too complex?
wouldn't this be much simpler:
SELECT *
FROM (SELECT row_number() over(order by number) as N from master..spt_values) t
where N not in (select 1 as sequence union
select 2 union
select 3 union
select 4 union
select 5 union
select 7 union
select 10 union
select 15
)
This is my interpretation of this issue, placing the contents in a Table variable that I can easily access in the remainder of my script.
DECLARE #IDS TABLE (row int, ID int)
INSERT INTO #IDS
select ROW_NUMBER() OVER (ORDER BY x.[Referred_ID]), x.[Referred_ID] FROM
(SELECT b.[Referred_ID] + 1 [Referred_ID]
FROM [catalog].[dbo].[Referrals] b) as x
LEFT JOIN [catalog].[dbo].[Referrals] a ON x.[Referred_ID] = a.[Referred_ID]
WHERE a.[Referred_ID] IS NULL
select * from #IDS
Just for fun, I decided to post my solution.
I had an identity column in my table and I wanted to find missing invoice numbers.
I reviewed all the examples I could find but they were not elegant enough.
CREATE VIEW EENSkippedInvoicveNo
AS
SELECT CASE WHEN MSCNT = 1 THEN CAST(MSFIRST AS VARCHAR (8)) ELSE
CAST(MSFIRST AS VARCHAR (8)) + ' - ' + CAST(MSlAST AS VARCHAR (8)) END AS MISSING,
MSCNT, INV_DT FROM (
select invNo+1 as Msfirst, inv_no -1 as Mslast, inv_no - invno -1 as msCnt, dbo.fmtdt(Inv_dt) AS INV_dT
from (select inv_no as invNo, a4glidentity + 1 as a4glid
from oehdrhst_sql where inv_dt > 20140401) as s
inner Join oehdrhst_sql as h
on a4glid = a4glidentity
where inv_no - invno <> 1
) AS SS
DECLARE #MaxID INT = (SELECT MAX(timerecordid) FROM dbo.TimeRecord)
SELECT SeqID AS MissingSeqID
FROM (SELECT ROW_NUMBER() OVER (ORDER BY column_id) SeqID from sys.columns) LkUp
LEFT JOIN dbo.TimeRecord t ON t.timeRecordId = LkUp.SeqID
WHERE t.timeRecordId is null and SeqID < #MaxID
I found this answer here:
http://sql-developers.blogspot.com/2012/10/how-to-find-missing-identitysequence.html
I was looking for a solution and found many answers. This is the one I used and it worked very well. I hope this helps anyone looking for a similar answer.
-- This will return better Results
-- ----------------------------------
;With CTERange
As (
select (select isnull(max(ArchiveID)+1,1) from tblArchives where ArchiveID < md.ArchiveID) as [from],
md.ArchiveID - 1 as [to]
from tblArchives md
where md.ArchiveID != 1 and not exists (
select 1 from tblArchives md2 where md2.ArchiveID = md.ArchiveID - 1)
) SELECT [from], [to], ([to]-[from])+1 [total missing]
From CTERange
ORDER BY ([to]-[from])+1 DESC;
from to total missing
------- ------- --------------
6 6 1
8 8 1
11 14 4
DECLARE #TempSujith TABLE
(MissingId int)
Declare #Id Int
DECLARE #mycur CURSOR
SET #mycur = CURSOR FOR Select Id From tbl_Table
OPEN #mycur
FETCH NEXT FROM #mycur INTO #Id
Declare #index int
Set #index = 1
WHILE ##FETCH_STATUS = 0
BEGIN
if (#index < #Id)
begin
while #index < #Id
begin
insert into #TempSujith values (#index)
set #index = #index + 1
end
end
set #index = #index + 1
FETCH NEXT FROM #mycur INTO #Id
END
Select Id from tbl_Table
select MissingId from #TempSujith
Create a useful Tally table:
-- can go up to 4 million or 2^22
select top 100000 identity(int, 1, 1) Id
into Tally
from master..spt_values
cross join master..spt_values
Index it, or make that single column as PK.
Then use EXCEPT to get your missing number.
select Id from Tally where Id <= (select max(Id) from TestTable)
except
select Id from TestTable
You could also solve using something like a CTE to generate the full sequence:
create table #tmp(sequence int)
insert into #tmp(sequence) values (1)
insert into #tmp(sequence) values (2)
insert into #tmp(sequence) values (3)
insert into #tmp(sequence) values (5)
insert into #tmp(sequence) values (6)
insert into #tmp(sequence) values (8)
insert into #tmp(sequence) values (10)
insert into #tmp(sequence) values (11)
insert into #tmp(sequence) values (14)
DECLARE #max INT
SELECT #max = max(sequence) from #tmp;
with full_sequence
(
Sequence
)
as
(
SELECT 1 Sequence
UNION ALL
SELECT Sequence + 1
FROM full_sequence
WHERE Sequence < #max
)
SELECT
full_sequence.sequence
FROM
full_sequence
LEFT JOIN
#tmp
ON
full_sequence.sequence = #tmp.sequence
WHERE
#tmp.sequence IS NULL
Hmmmm - the formatting is not working on here for some reason? Can anyone see the problem?
i had made a proc so you can send the table name and the key and the result is a list of missing numbers from the given table
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
create PROCEDURE [dbo].[action_FindMissing_Autoincremnt]
(
#tblname as nvarchar(50),
#tblKey as nvarchar(50)
)
AS
BEGIN
SET NOCOUNT ON;
declare #qry nvarchar(4000)
set #qry = 'declare #min int '
set #qry = #qry + 'declare #max int '
set #qry = #qry +'select #min = min(' + #tblKey + ')'
set #qry = #qry + ', #max = max('+ #tblKey +') '
set #qry = #qry + ' from '+ #tblname
set #qry = #qry + ' create table #tmp (Field_No int)
while #min <= #max
begin
if not exists (select * from '+ #tblname +' where '+ #tblKey +' = #min)
insert into #tmp (Field_No) values (#min)
set #min = #min + 1
end
select * from #tmp order by Field_No
drop table #tmp '
exec sp_executesql #qry
END
GO
SELECT TOP 1 (Id + 1)
FROM CustomerNumberGenerator
WHERE (Id + 1) NOT IN ( SELECT Id FROM CustomerNumberGenerator )
Working on a customer number generator for my company. Not the most efficient but definitely most readable
The table has one Id column.
The table allows for Ids to be inserted at manually by a user off sequence.
The solution solves the case where the user decided to pick a high number