Here is my problem: I have a stored procedure in SQL Server 2012 which should do the following thing.
I will pass an input parameter #Range, and the stored procedure should insert values into a table starting from 0 to #Range-1.
CREATE PROC MyExample
(#Range INT)
AS
BEGIN
// Suppose the value of #Range is 100
// So I should do INSERT into MyTable Values(0,1,2,3,4,5,6,......99)
END
Any idea how to achieve this?
You can use while loop as below:
Declare #Index AS INT=0
WHILE #Index<#Range
BEGIN
INSERT into MyTable Values(#Index)
SET #Index=#Index+1
END
I am thinking your teacher may suspect why you use cte when you just learn a loop
CREATE PROC MyExample
(
#Range INT,
)
AS
BEGIN
;WITH numbers AS
(
SELECT 0 AS Value WHERE #Range >= 0 -- Validate the #Range value too, try 0 or negative values
UNION ALL SELECT Value + 1 FROM numbers WHERE Value + 1 < #Range
)
INSERT INTO MyTable
SELECT * FROM numbers
OPTION (MAXRECURSION 0)
END
And here is a set based approach:
CREATE PROC MyExample
(
#Range INT,
)
AS
BEGIN
INSERT INTO MyTable (Number)
SELECT TOP (#Range) ROW_NUMBER() OVER(ORDER BY (SELECT NULL)) - 1
FROM sys.objects s1
CROSS JOIN sys.objects s2
END
(Based on this SO post)
CREATE PROC MyExample
(
#Range INT,
)
AS
BEGIN
declare #RANGE_COUNT int
select #RANGE_COUNT =#Range
//Suppose the value of #Range is 100
while #RANGE_COUNT<>0
begin
//So I should do INSERT into MyTable Values(0,1,2,3,4,5,6,......99)
INSERT into MyTable Values(#Range)
set #RANGE_COUNT = RANGE_COUNT -1
end
END
Using tally table technique:
DECLARE #range INT = 100
SELECT TOP(#range) -1 + ROW_NUMBER() OVER(ORDER BY (SELECT NULL)) AS rn
FROM
(VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) t1(n) CROSS JOIN --10
(VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) t2(n) CROSS JOIN --100
(VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) t3(n) --1000
--...continue to cover all possible #range values
Related
I want to loop through a list and insert each item into a column and iterate 1000 time. I am SQL noob - can anyone help me with this?
What I have so far:
DECLARE #Counter INT
DECLARE #myList varchar(100)
SET #Counter = 0
SET #myList = 'temp,humidity,dewpoint'
WHILE (#Counter <= 1000)
BEGIN
INSERT INTO [DBO].[tbl_var] (VariableNames)
VALUES (#myList)
SET #Counter = #Counter + 1
END
I get this error:
Cannot insert the value NULL into column 'VariableNames', table 'master.DBO.tbl_var'; column does not allow nulls. INSERT fails.
What I expected
VariableNames column
1. temp
2. humidity
3. dewpoint
4. temp
5. humidity
6. dewpoint
and so on until 1000 iterations of list is complete
If you want to INSERT each value 1000 times then use a VALUES table construct and CROSS JOIN to a tally containing 1,000 rows. I use an inline tally in the solution below:
USE YourUserDatabase;
GO
WITH N AS(
SELECT N
FROM (VALUES(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL))N(N)),
Tally AS(
SELECT ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) AS I
FROM N N1, N N2, N N3) --1,000 rows
INSERT INTO dbo.tbl_var (VariableNames)
SELECT V.VariableName
FROM (VALUES('temp'),
('humidity'),
('dewpoint'),
('temp'),
('humidity'),
('dewpoint'))V(VariableName)
CROSS JOIN Tally T;
I have not tested but this should work. You can use STRING_SPLIT function https://learn.microsoft.com/en-us/sql/t-sql/functions/string-split-transact-sql?view=sql-server-ver16
DECLARE #Counter INT =1
DECLARE #myList varchar(100)
SET #Counter=1
SET #myList = 'temp,humidity,dewpoint'
CREATE TABLE #TEMP (value varchar(255),cardinal Int)
INSERT INTO #TEMP(value,cardinal)
SELECT * FROM STRING_SPLIT(#myList, ',',1);
WHILE ( #Counter <= 1000)
BEGIN
INSERT INTO [DBO].[tbl_var] (VariableNames)
SELECT value from #TEMP WHERE cardinal =#counter
SET #Counter = #Counter + 1
END
I want to create series data in SQL for my testing purpose.
Ex.
Product1
Product2
Product3
.
.
.
Product1000
I want to create 1000 records like above manner in SQL.
Can anybody suggest me the solution ?
Thank you
You can do that via recursive way if you are working with SQL Server:
with series as (
select 1 as id
union all
select id+1
from series
where id < 1000
)
select concat('Product', id)
from series s
option (maxrecursion 1000);
Just another option using an ad-hoc tally table
Example
Select Top 1000 Product=concat('Product',Row_Number() Over (Order By (Select NULL)))
From master..spt_values n1
Returns
Product1
Product2
Product3
Product4
...
Product998
Product999
Product1000
Here you go:
DECLARE #temp TABLE(
Products VARCHAR(15)
);
DECLARE #counter INT
SET #counter = 1
WHILE (#counter <= 1000)
BEGIN
INSERT INTO #temp
VALUES('Product'+CONVERT(VARCHAR(5),#counter));
SET #counter = #counter + 1
END
SELECT * FROM #temp;
This should get you started.
DECLARE #table table (Product varchar(200))
DECLARE #cnt INT; SET #cnt = 0
WHILE #cnt <=10
BEGIN
SET #cnt = #cnt + 1
insert into #table
SELECT 'Product' +CAST(#cnt as varchar(150))
END
select * from #table
A set-based CTE can generate test data quickly. Even better would be a tally (a.k.a.) numbers table.
WITH
t10 AS (SELECT n FROM (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) t(n))
,t1k AS (SELECT ROW_NUMBER() OVER (ORDER BY (SELECT 0)) AS num FROM t10 AS a CROSS JOIN t10 AS b)
SELECT 'Product' + CAST(num AS varchar(10))
FROM t1k;
I would like to select some rows multiple-times, depending on the column's value.
Source table
Article | Count
===============
A | 1
B | 4
C | 2
Wanted result
Article
===============
A
B
B
B
B
C
C
Any hints or samples, please?
You could use:
SELECT m.Article
FROM mytable m
CROSS APPLY (VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10)) AS s(n)
WHERE s.n <= m.[Count];
LiveDemo
Note: CROSS APLLY with any tally table. Here values up to 10.
Related: What is the best way to create and populate a numbers table?
You could also use a recursive CTE which works with numbers > 10 (here up to 1000):
With NumberSequence( Number ) as
(
Select 0 as Number
union all
Select Number + 1
from NumberSequence
where Number BETWEEN 0 AND 1000
)
SELECT Article
FROM ArticleCounts
CROSS APPLY NumberSequence
WHERE Number BETWEEN 1 AND [Count]
ORDER BY Article
Option (MaxRecursion 0)
Demo
A number-table will certainly be the best option.
http://sqlperformance.com/2013/01/t-sql-queries/generate-a-set-2
Please check following SQL script
Before executing the SELECT statement, note that I used a user function which is used to simulate a numbers table
You can find the sql codes of numbers table in SQL Server at referred tutorial
----create table myTempTbl (Article varchar(10), Count int)
--insert into myTempTbl select 'A',1
--insert into myTempTbl select 'B',4
--insert into myTempTbl select 'C',2
select t.*
from myTempTbl t
cross apply dbo.NumbersTable(1,100,1) n
where n.i <= t.Count
order by t.Article
one more CTE
with cte_t as (
select c as c, 1 as i
from mytable
group by c
union all
select t.c, ctet.i + 1
from mytable t
join cte_t ctet
on ctet.c = t.c
and ctet.i < t.i
)
select cte_t.c
from cte_t
order by cte_t.c
Can obtain the output using simple WHILE LOOP
DECLARE #table TABLE
(ID int ,Article varchar(5),[Count] int)
INSERT INTO #table
(ID,Article,Count)
VALUES
(1,'A',1),(2,'B',4),(3,'C',2)
DECLARE #temp TABLE
(Article varchar(5))
DECLARE #Cnt1 INT
DECLARE #Cnt2 INT
DECLARE #Check INT
DECLARE #max INT
SET #max =0
SET #Cnt1 = (SELECT Count(Article) FROM #table)
WHILE (#max < #Cnt1)
BEGIN
SET #max = #max +1
SET #Cnt2 = (SELECT [Count] FROM #table WHERE ID =#max)
SET #Check =(SELECT [Count] FROM #table WHERE ID =#max)
WHILE (#Cnt2 > 0)
BEGIN
INSERT INTO #temp
SELECT Article FROM #table WHERE [Count] =#Check
SET #Cnt2 = #Cnt2 -1
END
END
SELECT * FROM #temp
I need some on help a SQL Query. I have a column with values stored as comma separated values.
I need to write a query which finds the 3rd delimited item within each value in the column.
Is this possible to do this in a Select statement?
ex: ColumnValue: josh,Reg01,False,a0-t0,22/09/2010
So I will need to get the 3rd value (i.e.) False from the above string.
Yes.
Where #s is your string...
select
SUBSTRING (#s,
CHARINDEX(',',#s,CHARINDEX(',',#s)+1)+1,
CHARINDEX(',',#s,CHARINDEX(',',#s,CHARINDEX(',',#s)+1)+1)
-CHARINDEX(',',#s,CHARINDEX(',',#s)+1)-1)
Or more generically...
;with cte as
(
select 1 as Item, 1 as Start, CHARINDEX(',',#s, 1) as Split
union all
select cte.Item+1, cte.Split+1, nullif(CHARINDEX(',',#s, cte.Split+1),0) as Split
from cte
where cte.Split<>0
)
select SUBSTRING(#s, start,isnull(split,len(#s)+1)-start)
from cte
where Item = 3
Now store your data properly :)
Try this (assuming SQL Server 2005+)
DECLARE #t TABLE(ColumnValue VARCHAR(50))
INSERT INTO #t(ColumnValue) SELECT 'josh,Reg01,False,a0-t0,22/09/2010'
INSERT INTO #t(ColumnValue) SELECT 'mango,apple,bannana,grapes'
INSERT INTO #t(ColumnValue) SELECT 'stackoverflow'
SELECT ThirdValue = splitdata
FROM(
SELECT
Rn = ROW_NUMBER() OVER(PARTITION BY ColumnValue ORDER BY (SELECT 1))
,X.ColumnValue
,Y.splitdata
FROM
(
SELECT *,
CAST('<X>'+REPLACE(F.ColumnValue,',','</X><X>')+'</X>' AS XML) AS xmlfilter FROM #t F
)X
CROSS APPLY
(
SELECT fdata.D.value('.','varchar(50)') AS splitdata
FROM X.xmlfilter.nodes('X') as fdata(D)
) Y
)X WHERE X.Rn = 3
//Result
ThirdValue
False
bannana
Also it is not very clear from your question as what version of SQL Server you are using. In case you are using SQL SERVER 2000, you can go ahead with the below approach.
Step 1: Create a number table
CREATE TABLE dbo.Numbers
(
N INT NOT NULL PRIMARY KEY
);
GO
DECLARE #rows AS INT;
SET #rows = 1;
INSERT INTO dbo.Numbers VALUES(1);
WHILE(#rows <= 10000)
BEGIN
INSERT INTO dbo.Numbers SELECT N + #rows FROM dbo.Numbers;
SET #rows = #rows * 2;
END
Step 2: Apply the query below
DECLARE #t TABLE(ColumnValue VARCHAR(50))
INSERT INTO #t(ColumnValue) SELECT 'josh,Reg01,False,a0-t0,22/09/2010'
INSERT INTO #t(ColumnValue) SELECT 'mango,apple,bannana,grapes'
INSERT INTO #t(ColumnValue) SELECT 'stackoverflow'
--Declare a table variable to put the identity column and store the indermediate results
DECLARE #tempT TABLE(Id INT IDENTITY,ColumnValue VARCHAR(50),SplitData VARCHAR(50))
-- Insert the records into the table variable
INSERT INTO #tempT
SELECT
ColumnValue
,SUBSTRING(ColumnValue, Numbers.N,CHARINDEX(',', ColumnValue + ',', Numbers.N) - Numbers.N) AS splitdata
FROM #t
JOIN Numbers ON Numbers.N <= DATALENGTH(ColumnValue) + 1
AND SUBSTRING(',' + ColumnValue, Numbers.N, 1) = ','
--Project the filtered records
SELECT ThirdValue = X.splitdata
FROM
--The co-related subquery does the ROW_NUMBER() OVER(PARTITION BY ColumnValue)
(SELECT
Rn = (SELECT COUNT(*)
FROM #tempT t2
WHERE t2.ColumnValue=t1.ColumnValue
AND t2.Id<=t1.Id)
,t1.ColumnValue
,t1.splitdata
FROM #tempT t1)X
WHERE X.Rn =3
-- Result
ThirdValue
False
bannana
Also you can use Master..spt_Values for your number table
DECLARE #t TABLE(ColumnValue VARCHAR(50))
INSERT INTO #t(ColumnValue) SELECT 'josh,Reg01,False,a0-t0,22/09/2010'
INSERT INTO #t(ColumnValue) SELECT 'mango,apple,bannana,grapes'
INSERT INTO #t(ColumnValue) SELECT 'stackoverflow'
--Declare a table variable to put the identity column and store the indermediate results
DECLARE #tempT TABLE(Id INT IDENTITY,ColumnValue VARCHAR(50),SplitData VARCHAR(50))
-- Insert the records into the table variable
INSERT INTO #tempT
SELECT
ColumnValue
,SUBSTRING(ColumnValue, Number ,CHARINDEX(',', ColumnValue + ',', Number ) - Number) AS splitdata
FROM #t
JOIN master..spt_values ON Number <= DATALENGTH(ColumnValue) + 1 AND type='P'
AND SUBSTRING(',' + ColumnValue, Number , 1) = ','
--Project the filtered records
SELECT ThirdValue = X.splitdata
FROM
--The co-related subquery does the ROW_NUMBER() OVER(PARTITION BY ColumnValue)
(SELECT
Rn = (SELECT COUNT(*)
FROM #tempT t2
WHERE t2.ColumnValue=t1.ColumnValue
AND t2.Id<=t1.Id)
,t1.ColumnValue
,t1.splitdata
FROM #tempT t1)X
WHERE X.Rn =3
You can read about this from
1) What is the purpose of system table table master..spt_values and what are the meanings of its values?
2) Why (and how) to split column using master..spt_values?
You really need something like String.Split(',')(2) which unfortunately dos not exist in SQL but this may be helpful to you
You can make some test with this solution and the other ones but, I believe that using XML in such situations almost always gives to you best performance and insure less coding:
DECLARE #InPutCSV NVARCHAR(2000)= 'josh,Reg01,False,a0-t0,22/09/2010'
DECLARE #ValueIndexToGet INT=3
DECLARE #XML XML = CAST ('<d>' + REPLACE(#InPutCSV, ',', '</d><d>') + '</d>' AS XML);
WITH CTE(RecordNumber,Value) AS
(
SELECT ROW_NUMBER() OVER(ORDER BY T.v.value('.', 'NVARCHAR(100)') DESC) AS RecordNumber
,T.v.value('.', 'NVARCHAR(100)') AS Value
FROM #XML.nodes('/d') AS T(v)
)
SELECT Value
FROM CTE WHERE RecordNumber=#ValueIndexToGet
I can confirm that it takes 1 seconds to get value from CSV string with 100 000 values.
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