Searching Missing Number - SQL Server Forums

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Searching Missing Number

Author

Topic

samamun001
Starting Member

17 Posts

Posted - 2005-01-09 : 09:23:28

Hello,
I have a table say temp. In temp the info is like

1
2
5
7

I want the missing number.

3
4
6

How can I do it without using cursor

samamun

amachanic
SQL Server MVP

169 Posts

Posted - 2005-01-09 : 09:33:23

First create a table of numbers:

http://sqljunkies.com/WebLog/amachanic/articles/NumbersTable.aspx

Then:

SELECT N.Number
FROM Numbers N
LEFT JOIN YourTable T
ON T.Number = N.Number
WHERE T.Number IS NULL

amachanic
SQL Server MVP

169 Posts

Posted - 2005-01-09 : 09:34:52

In retrospect, you may want to change it slightly:

SELECT N.Number
FROM Numbers N
LEFT JOIN YourTable T
ON T.Number = N.Number
WHERE T.Number IS NULL
AND N.Number < (SELECT MAX(T1.Number) FROM YourTable T1)

nr
SQLTeam MVY

12543 Posts

Posted - 2005-01-09 : 10:22:57

see
http://www.mindsdoor.net/SQLTsql/FindGapsInSequence.html

==========================================
Cursors are useful if you don't know sql.
DTS can be used in a similar way.
Beer is not cold and it isn't fizzy.

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