Tag: mysql-workbench

So I was working on the problem of optimizing the following query I have already optimized this to the fullest from my side can this be further optimized? Answer Your query although joined ok, is an overall bloat. You are using the dim_ad_type table on the outside, just to make sure it exists on the inside as…

I can’t add a foreign key to an existing table. The error is as follows Answer I’ve written the schema below which is working. I advise against using the same name student_id for the constraint as already used for the column. I would prefer fk_student_id to avoid risk of an ambiguity or conflict a…

customers table id name 1 a 2 b 3 c 4 d purchase table product_id customer_id x 1 y 1 x 4 y 4 x 3 z 2 the customer table has customer data and purchase table has order data. Now coming to question, I want customers id who bought similar products ordered by the count of similar items eg:

So I have this problem in SQL where the question is this: List the sId and name of students that applied to “WSU” But not “U of O”. and my attempt was this: However this does not do the trick as it doesn’t catch that some of the students had already applied to U of O. MRE: And then of

If the table have only two columns with employee name and their supervisor column and if it doesn’t have any other numeric or number column with employee_number or employee_id, then how the results can be produced. I’m not getting logic to show the results. Code for creating table in Mysql: It&#82…