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Peter7218
Starting Member
2 Posts |
 Posted - 2013-04-22 : 09:33:25
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| I am puzzled. What is the purpose of this query?declare @empName varchar(200), @salary moneyset @empName=nullset @salary=1000select *from Employee_Testwhere (@empName is null or Emp_name=@empName)and (@salary is null or Emp_Sal=@salary) |
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bandi
Master Smack Fu Yak Hacker
2242 Posts |
Posted - 2013-04-22 : 09:36:31
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| Purpose is:If you enter any value, then retrieves records which satisfies that conditionOtherwise it will show all records (in the case of @empname = null or @salary = null)--Chandu |
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MIK_2008
Master Smack Fu Yak Hacker
1054 Posts |
Posted - 2013-04-22 : 09:41:44
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| Kinda quiz?? :) Employess without name but salary as 1000CheersMIK |
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visakh16
Very Important crosS Applying yaK Herder
52326 Posts |
Posted - 2013-04-22 : 11:55:30
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quote:
Originally posted by MIK_2008
Kinda quiz?? :) Employess without name but salary as 1000CheersMIK
Nopeits just retrieving list of employees who have the passed salary value (1000)the empname = null is to bypass the employeename filter------------------------------------------------------------------------------------------------------SQL Server MVPhttp://visakhm.blogspot.com/https://www.facebook.com/VmBlogs |
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Peter7218
Starting Member
2 Posts |
Posted - 2013-04-22 : 19:21:56
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| Any expert out there, PLEASE help to solve my puzzle. |
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logpop
Starting Member
16 Posts |
Posted - 2013-04-22 : 19:44:57
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| It lists all employees with salary 1000. |
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MuMu88
Aged Yak Warrior
549 Posts |
Posted - 2013-04-22 : 19:50:57
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| As visakh16 explained, the query returns all records where employee salary is 1000. |
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James K
Master Smack Fu Yak Hacker
3873 Posts |
Posted - 2013-04-22 : 21:16:19
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| Just a word of caution: when you use this technique to bypass search conditions in a stored procedure, that can result in some extremely bad execution plans. See Sommarskog's article here for analysis and alternatives: http://www.sommarskog.se/dyn-search-2008.html |
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visakh16
Very Important crosS Applying yaK Herder
52326 Posts |
Posted - 2013-04-23 : 12:41:48
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quote:
Originally posted by Peter7218
Any expert out there, PLEASE help to solve my puzzle.
whats the puzzle? isnt my statement answer your puzzle?------------------------------------------------------------------------------------------------------SQL Server MVPhttp://visakhm.blogspot.com/https://www.facebook.com/VmBlogs |
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PLS HELP