How to send an IF statement by a Transaction

[raulbolanos]

Hi guys,

how can I send an IF statement by T-SQL?

Lets suppose that I want to insert something, for example;

int n_count = 5;
string querytosend = @"if  (" + n_count + " > 0)
     INSERT persons (name, age, address) values ('raul', 23, 'Könnigstraße 23')";
 

the if statements change regarding the DB engine, I have installed MySQL Server 2005, when I send transactions the server version is 5.0.67-community-nt. I think that's why I get and 1064 Code Error. If you could advise me somehow I will appreciate so much.

Raul Bolaños,
Best regards.

[raulbolanos]

@raulbolanos
I cant make this work... please help me.

int x = 23;
string queryString = @"CASE WHEN (" + x + @" > 0)
                                     THEN UPDATE person SET person.age = 23 WHERE age = 22
                                     ELSE 'x is less than 0'
                                   END";
 

[PRR]

You will have to go through the syntax of t-sql statements .
Link
MSDN

[raulbolanos]

@DeepBlue
The problem is that I have found only examples where whether the IF or CASE..WHEN statements are inside the Query. And I need to apply them outside.

[r035198x]

You don't need to send an if to T-SQL at all. You have all value of n in your C# code, test it there using C# and run the insert only if your required conditions are met.
You use an IF in T-SQL only if the arguments to the IF are themselves coming from the database.