You must join tables by finding rows in the two tables that have identical values in matching columns.
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Q1: You can use the EXISTS operator to
Q2: For two tables to be union compatible,the
Q3: One reason for using an alias is
Q4: To relate two tables,in the FROM clause
Q6: There is only one approach to joining
Q9: When joining tables,it is always necessary to
Q11: You can join tables by using a
Q12: You can use the IN operator to
Q12: When the innermost subquery is evaluated,a permanent
Q17: In a nested query, the outer query
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