You're required to create a conceptual data model of the data requirements of the company that specializes in IT training. The company has 30 instructors and could handle up to 100 trainees per training session. The offers five advanced technology courses, each of which is taught by a teaching team of two or more instructors . Each instructor is assigned to a maximum of two teaching teams or may be assigned to do research . Each trainee undertakes one advanced technology course per training session. Identify the main types of the company
You're required to create a conceptual data model of the data requirements of the company that specializes in IT training. The company has 30 instructors and could handle up to 100 trainees per training session. The offers five advanced technology courses, each of which is taught by a teaching team of two or more instructors . Each instructor is assigned to a maximum of two teaching teams or may be assigned to do research . Each trainee undertakes one advanced technology course per training session. Identify the main types of the company
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You are working with a database table that contains invoice data. The table includes columns for invoice_id and customer_id. You want to remove duplicate entries for customer ID and sort the results by invoice ID.
You write the SQL query below. Add a DISTINCT clause that will remove duplicate entries from the customer_id column.
NOTE: The three dots (...) indicate where to add the clause.
What customer ID number appears in row 12 of your query result?
16
42
23
8
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