Introduction to SQL
To define what columns should be displayed in an SQL SELECT statement:

use FROM to name the source table(s) and list the columns to be shown after SELECT.
use USING to name the source table(s) and list the columns to be shown after SELECT.
use USING to name the source table(s) and list the columns to be shown after WHER
use SELECT to name the source table(s) and list the columns to be shown after USING.

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Introduction to SQL
What does the following query find?(SELECT DISTINCT r.sidFROM boats b, reserves rWHERE b.bid = r.bidAND b.color = 'red')MINUS(SELECT DISTINCT r.sidFROM boats b, reserves rWHERE b.bid = r.bidAND b.color = 'green')

None of These
Find the sailor IDs of all sailors who have reserved red boats but not green boats
Find the sailor Ids of atmost one sailor who have reserved red boats but not green boats
Find the sailor IDs of at least one sailor who have reserved red boats but not green boats

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