Question

I’ve got a mySql stored procedure that looks like this–

delimiter | create procedure GetEmployeeById(in ID varchar(45)) begin   select id,       firstName,       lastName,       phone,       address1,       address2,       city,       state,       zip,       username,       password,       emptypeid   from myschema.tblemployees t   where       t.id=ID limit 1; end | delimiter; 

If i don’t have the limit 1 in place, it always returns all of the rows in the table–with each record’s id value set to the ID parameter. Why can’t i just use where id=ID, and why does it return all of the records when i do? What are the implications of me using limit 1? Why am i programming on a saturday night?

Answer 1

Because, it’s comparing t.id with itself, which will always be true. Call your formal parameter something else.