Question

I have a function which takes an argument that is used in where clause

function(string x)–>Now this will create a sql query which gives

select colname from tablename where columnname=x;

Now I want this function to give all rows i.e. query equivalent to

select colname from tablename;

when I pass x=”All”.

I want to create a generic query that when I pass “All” then it should return me all the rows else filter my result.

Answer 1

Just leave the where condition out.

If you really want it that complicated use

where columnname LIKE '%'

which will only filter nulls.