How to use Like expression with c# and postgresql as database server

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Hello, My problem at first seems like an easy issue to be fix, but I've spent 3 hours trying to solve this.

I want to use this expression

SQL

Select p.* from persona p where p.firstname like '%+?+%'

I had try the following

SQL

- Select p.* from persona p where p.firstname like "'%"+?+"%'"
- Select p.* from persona p where p.firstname like '%'+?+'%'
- Select p.* from persona p where p.firstname like ? (?='%parameter%')

but all the above gives me a error or doesn't returns any rows even when there is row that match the expression.

How should I make the query, I'm using c# with DataSet , postgreSQL

Regards
Gabriel

Posted 25-Aug-13 19:04pm

Member 10231124

Updated 25-Aug-13 19:11pm

Aarti Meswania

v2

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2 solutions

Solution 2

Problem solved!!!

Thanks Aarti

Posted 27-Aug-13 9:50am

Member 10231124

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Aarti Meswania 28-Aug-13 14:15pm

Welcome,
Glad to help you! :)

you should use "Have a Question or Comment?" button given below particular que-ans.

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Aarti Meswania · Accepted Answer · 2013-08-25T19:11:00

Solution 1

try this...

SQL

Select 
   p.* 
from persona p 
where p.firstname like CONCAT('%',  ?  ,'%')

Happy Coding!
:)

Posted 25-Aug-13 19:11pm

Aarti Meswania