试题详情
- 单项选择题What is true about joining tables through an equijoin?（）
A、You can join a maximum of two tables through an equijoin.
B、You can join a maximum of two columns through an equijoin.
C、You specify an equijoin condition in the SELECT or FROM clauses of a SELECT statement.
D、To join two tables through an equijoin, the columns in the join condition must be primary key and foreign key columns.
E、You can join n tables (all having single column primary keys) in a SQL statement by specifying a minimum of n-1 join conditions.
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