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Bizarre behaviour...


Bizarre behaviour...

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oranjjje
oranjjje
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Group: General Forum Members
Points: 2 Visits: 4
Does this seem weird to you too?

I know that é is the same letter as É as I speak fluent french but what about this accented "Z"? How can it run through UPPER and fail the case-insensitive equality check?


--SQL_Latin1_General_CP1_CI_AI

SELECT CASE WHEN 'ž'='Ž' THEN 'TRUE' ELSE 'FALSE' END
--> FALSE

SELECT CASE WHEN 'é'='É' THEN 'TRUE' ELSE 'FALSE' END
--> TRUE

SELECT UPPER('ž')
--> Ž
Andrew G
Andrew G
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Group: General Forum Members
Points: 3967 Visits: 2279
Dont use SQL_Latin1_General_CP1_CI_AS / AI with a varchar variable datatype if you have unicode data. You will experience problems like the one you have due to an implicit conversion. Another example is documented here:
http://www.olcot.co.uk/sql-blogs/revised-difference-between-collation-sql_latin1_general_cp1_ci_as-and-latin1_general_ci_as

Note if you use unicode datatypes, you will get the correct answer, TRUE;
SELECT CASE WHEN N'ž'= N'Ž' THEN 'TRUE' ELSE 'FALSE' END



The newer windows collation Latin1_CP1_CI_AS / AI will give you the correct answer as it has better rules for comparing non-unicode to unicode data.
http://support.microsoft.com/kb/322112
oranjjje
oranjjje
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Group: General Forum Members
Points: 2 Visits: 4
Thank you good sir Smile
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