queryLimit method
Adds a 'LIMIT' clause to the SQL query.
The limit parameter is optional and defaults to an empty string. It should contain the limit for the 'LIMIT' clause.
This method adds a 'LIMIT' clause to the _select list and then returns the SqlBuilder instance for method chaining.
Usage:
var builder = SqlBuilder();
builder.queryLimit(limit: '10');
Implementation
SqlBuilder queryLimit({String limit = ''}) {
_select.add('LIMIT $limit ');
return this;
}