I have a table named PAYMENT. Within this table I have a user ID, an account number, a ZIP code and a date. I would like to find all records for all users that have more than one payment per day with the same account number. UPDATE: Additionally, there should be a filter than only … Read more
I have the following two tables: 1. Lecturers (LectID, Fname, Lname, degree). 2. Lecturers_Specialization (LectID, Expertise). I want to find the lecturer with the most Specialization. When I try this, it is not working: SELECT L.LectID, Fname, Lname FROM Lecturers L, Lecturers_Specialization S WHERE L.LectID = S.LectID AND COUNT(S.Expertise) >= ALL (SELECT COUNT(Expertise) FROM Lecturers_Specialization … Read more
What is the difference between HAVING and WHERE in an SQL SELECT statement? EDIT: I have marked Steven’s answer as the correct one as it contained the key bit of information on the link: When GROUP BY is not used, HAVING behaves like a WHERE clause The situation I had seen the WHERE in did … Read more
