dynamic sql doubt on quotation

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--i have read some article and found that

''' anurag ''' --this in dynamic sql will be treated as 'anurag'

SQL

declare @var varchar(max)
set @var='select * from tbl_user_master where first_name like'+ '''%anurag%'''
print @var
exec (@var)

--i get the result

------------------------------------------------------------------------------
--but why i get error on below query

SQL

declare @var varchar(max)

set @var='select * from tbl_user_master where first_name like '''%anurag%''' '
print @var

exec (@var)

--Msg 207, Level 16, State 1, Line 3
Invalid column name 'anurag'.

-- i m new to it.. kindly guide me.

--i thought both are same and both will give me the same result

Posted 6-Sep-13 4:55am

anurag19289

Updated 6-Sep-13 4:56am

v2

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Richard C Bishop 6-Sep-13 10:58am

You have an extra single quote at the end of the second snippet of SQL.

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OriginalGriff · Accepted Answer · 2013-09-06T05:22:00

No, they aren't the same!
The in first example:

like' + '''%anurag%'''
    ^   ^^^        ^^^---- Close second string
    |   |||        ||----- 2nd character of a pair of quotes\
    |   |||        |                                         - These create a single ' character
    |   |||        |------ 1st character of a pair of quotes/
    |   |||--------------- 2nd character of a pair of quotes\
    |   ||                                                   - These create a single ' character
    |   ||---------------- 1st character of a pair of quotes/
    |   |----------------- Open second string
    |--------------------- Close first string

In the second example:

like '''%anurag%''' '
     |||        ||| |----- Or this...
     |||        |||------- Or this...
     |||        ||-------- Or this...
     |||        |--------- SQL not going to look at this...
     |||                   ERK! SQL NO UNDERSTAND! **REDO FROM START** ***OUT OF CHEESE ERROR***
     |||------------------ End of first string
     ||------------------- 2nd character of a pair of quotes\
     |                                                       - These create a single ' character
     |-------------------- 1st character of a pair of quotes/