464-4

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I am having trouble understanding which table and column to call in SELECT after I join a bunch of tables
DQ Courses
sql ,  464 ,  464-4 ,  sql-joins-relations-de
4 220 February 20, 2022
What's causing a difference in output?
DQ Courses
sql ,  464 ,  464-4 ,  sql-joins-relations-de
2 151 February 11, 2022
Cannot understand the issue
Q&A
464 ,  464-4 ,  sql-joins-relations-de
2 200 December 31, 2021
Reason for Joining to a Subquery
Q&A
464 ,  464-4
3 256 April 21, 2021