select_set_distinct

Description:

[ Version ( since = "4.2" ) ]
public void select_set_distinct (bool distinct, SqlBuilderId expr_id)

Defines (if distinct is true) or removes (if distinct is false) a DISTINCT clause for a SELECT statement.

If distinct is true, then the ID of an expression can be specified as the expr_id argument: if not typeof (unichar2)0, this is the expression used to apply the DISTINCT clause on (the resuting SQL will then usually be "... DISTINCT ON <expression>...").

Parameters:

this	a SqlBuilder object
distinct	set to `true` to have the DISTINCT requirement
expr_id	the ID of the DISTINCT ON expression, or `typeof (unichar2)`0 if no expression is to be used. It is ignored if `distinct` is `false`.