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|    Message 18,801 of 19,505    |
|    Erland Sommarskog to Tony Johansson    |
|    Re: How do I write this sql statement    |
|    08 Dec 12 16:50:51    |
      From: esquel@sommarskog.se              Tony Johansson (johansson.andersson@telia.com) writes:       > In a field in the database called Cid we have a format like year-35-X       > So in the database we can have numbers that can look like this.       > 2012-35-1       > 2012-35-2       > ....       > 2012-35-56       > 2012-35-0145       >       > If I want a select statement that return the largest number for X how       > can I write this ?       > So if we have 2012-35-0194 in the database field Cid I want to get back       > 195 ?              RJA and Bob has already answered your question as posted, and they have       also hinted that you need to restructure the design. For one thing, what does       the existence of 2012-35-145 and 2012-35-0145 signify?              Whatever, to retrieve the MAX value of the last part, SQL Server needs to scan       the table. Or at least scan all entries for the year in question. Which may be       acceptable. Or just a plain disaster.              It seems to me that it would be better to have physical column that controls       this number, and you would run MAX on that column. Then you have a computed       column which holds the string.                     --       Erland Sommarskog, SQL Server MVP, esquel@sommarskog.se              Links for SQL Server Books Online:       SQL 2008: http://msdn.microsoft.com/en-us/sqlserver/cc514207.aspx       SQL 2005: http://msdn.microsoft.com/en-us/sqlserver/bb895970.aspx              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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