strange Unicode comparison

• haiao2000

  Hall of Fame

  Points: 3734

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  December 3, 2014 at 1:07 pm

  #295528

  Expert,

  I ran into a weird unicode issue. help me understand why I was not using wildcard search, but the result show as if I was. unless I indicated with an N?

  --why both of these returns a result? unless explicitly change to N'PM1_BEEL_BWT_MD_2Ω_RTU.PV' ?

  declare @temp table (dummy nvarchar(50))

  insert into @temp(dummy) values('PM1_BEEL_BWT_MD_2?_RTU.PV')

  --exact match

  select * from @temp where dummy = 'PM1_BEEL_BWT_MD_2Ω_RTU.PV'

  --

  select * from @temp where dummy LIKE 'PM1_BEEL_BWT_MD_2Ω_RTU.PV'

• mister.magoo

  SSC-Forever

  Points: 47068

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  December 3, 2014 at 1:22 pm

  #1762508

  try this:

  declare @dummy nvarchar(50) = 'PM1_BEEL_BWT_MD_2?_RTU.PV';

  select @dummy;

  The result is 'PM1_BEEL_BWT_MD_2?_RTU.PV', which is what you are putting in the table.

  Why? try this:

  declare @dummy varchar(50) = N'PM1_BEEL_BWT_MD_2?_RTU.PV' ;

  select @dummy;

  Same result - the conversion from the text editor to a sql variable/column converts the Ohm symbol to a ? because it is not valid in a varchar string, which is what you have typed.

  MM
  

  ---

  
  select geometry::STGeomFromWKB(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